Malicious PDF — malware analysis report

Static analysis result for SHA-256 96a74e634760eafe…

MALICIOUS

PDF

85.4 KB Created: 2021-09-18 17:44:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: dae31e3d1ce8b051c87f8d510856a4d2 SHA-1: 1d45dbc7265c6fa7f283b47ff1a89678dd56ecfb SHA-256: 96a74e634760eafe2c24ebe2d06737d83ea0f45ed7a162baca0c48b0ec7c1c13
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF file flagged by ClamAV as Pdf.Phishing.Trojan. It contains embedded JavaScript, which is often used to exploit vulnerabilities or redirect users. The document also features a large number of external links, including one pointing to a raw IP address, indicating a phishing or credential harvesting attempt. The presence of embedded JavaScript and numerous external links strongly suggests a malicious intent to redirect users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9607

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://oshcongregation.com/userfiles/file/majivemezojamosipopanat.pdf In PDF document text
    • http://honyi.tw/ckfinder/userfiles/file/samirajinerasezemag.pdfIn PDF document text
    • https://imapcb.org/wp-content/plugins/super-forms/uploads/php/files/f9dd9a27fb274d1beda591230859b64a/mumukogul.pdfIn PDF document text
    • http://www.rajpuc.pl/pics/file/pivimutigazovutepuse.pdfIn PDF document text
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/161402191100de---denugufu.pdfIn PDF document text
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/161351f92db8f6---wizedi.pdfIn PDF document text
    • http://donghobaoan.com/uploads/files/89065429910.pdfIn PDF document text
    • http://cesvil.it/filesUploads/file/doralagu.pdfIn PDF document text
    • http://muntepa.com/userfiles/files/44655009212.pdfIn PDF document text
    • https://dpengineers.info/admin/userfiles/file/xuzasedodulaloxitumek.pdfIn PDF document text
    • http://lasantitosrestaurant.com/userfiles/file/wuzatotoxivemavifovidot.pdfIn PDF document text
    • http://edallyshop.com/upload/files/dugubuvovefogiz.pdfIn PDF document text
    • https://floraplant.gr/FCKeditor/userimages/file/92261439529.pdfIn PDF document text
    • http://bnblspecialities.com/userfiles/files/81322842766.pdfIn PDF document text
    • https://12shio1.com/contents/files/ditipifunanote.pdfIn PDF document text
    • http://benedictinoselrosal.org/ckfinder/userfiles/files/vupidakafuserumugixu.pdfIn PDF document text
    • http://www.weilandensemble.nl/ckfinder/userfiles/files/79313595379.pdfIn PDF document text
    • https://www.techsrollout.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613502acc0503---tujubelif.pdfIn PDF document text
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141259db942d---41356926440.pdfIn PDF document text
    • http://tanabuauto.com/js/upload/files/vibatoxapinerixotevanusu.pdfIn PDF document text
    • https://xnkvinatimex.com/uploads/files/vojebilaba.pdfIn PDF document text
    • http://bebsulmare.com/userfiles/files/tasidagadiluz.pdfIn PDF document text
    • https://soyana.de/js/ckfinder/userfiles/files/83676699516.pdfIn PDF document text
    • http://157.230.241.115/image/upload/File/mesivokigifek.pdfPDF link annotation
    • http://www.laterveer-biesenbeek.nl/ckfinder/userfiles/files/54071784733.pdfIn PDF document text
    • http://denda.co.kr/ckfinder/userfiles/files/gipadoxubabidaraleka.pdfIn PDF document text
    • http://monkey-do.net/userfiles/file/72732678250.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=%D1%81%D0%BA%D0%B0%D1%87%D0%B0%D1%82%D1%8C+%D1%82%D0%B5%D0%BC%D1%83+%D0%BD%D0%B0+%D1%82%D0%B5%D0%BB%D0%B5%D1%84%D0%BE%D0%BD+%D0%B0%D0%BD%D0%B4%D1%80%D0%BE%D0%B8%D0%B4PDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bd1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD1E 1828 bytes
SHA-256: c65da4501f80be219574418733c77cb401adeeba023536fee640a710fe7be6ed
font_01_sfnt_off0000c5b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5B3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ddca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDCA 10852 bytes
SHA-256: 179ac80fe33df78f044af974be8be9b6407d6bd658a571c222e363cc8d24fd3b
font_03_sfnt_off0000f6c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6C4 16132 bytes
SHA-256: 071bac7a3a90310621307d68123817e30fba7c89f9e5021c4391eb43bd8b9137
font_04_sfnt_off00010c37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C37 22688 bytes
SHA-256: 1984d3532f8994be4ce05f1e0c7b867db33dbb36f674a5ebc6ea5b3017031d7a

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