Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1a063b47c2a13aa…

MALICIOUS

PDF

72.3 KB Created: 2021-09-30 17:45:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 20192e7cc80e70ac1e1a7d629f04a08b SHA-1: 409f08a9f053404ab18bd513b9704374c3011f33 SHA-256: e1a063b47c2a13aadec9d6ef0b6903d80d593f286d4cf359f7a8e438b87d266f
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains embedded JavaScript and a large number of external URIs, many of which point to compromised CMS upload directories or are part of link farms on disposable hosting. The embedded JavaScript likely serves to execute malicious code or redirect the user to a phishing or malware download site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 https://infrive.ru/uplcv?utm_term=pixel+car+racer+unlimited+money PDF link annotation
    • https://oferta.lt/i/File/55377007479.pdfIn PDF document text
    • https://congchung7.com/upload/file/jekavumewutujanabi.pdfIn PDF document text
    • https://lacausedeslivres.com/userfiles/file/surida.pdfIn PDF document text
    • http://rklatex.com/userfiles/file/birogopaxezifu.pdfIn PDF document text
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c7e4fa50ab---fisigoli.pdfIn PDF document text
    • https://www.tcf.gov.tr/ckfinder/userfiles/files/88601742028.pdfIn PDF document text
    • https://cepatdaftargroup2.com/contents/files/41776090180.pdfIn PDF document text
    • http://synergyproperty.com/images/files/minosivilunefabimalurosi.pdfIn PDF document text
    • http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/16152052878082---venadususujitutag.pdfIn PDF document text
    • http://www.ddd-iasi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/161492287a5ea3---sivoxuzajadezefeb.pdfIn PDF document text
    • http://hit-air.pro/ckfinder/userfiles/files/lafedufuvogiwajuto.pdfIn PDF document text
    • https://bongkartuantakur.com/contents/files/majenipodoruzeroju.pdfIn PDF document text
    • http://marthomaiticherukole.com/userfiles/file/kijaxotejeretunezirosa.pdfIn PDF document text
    • http://locthanhwindow.com/img_duhoc/files/xogudav.pdfIn PDF document text
    • http://foodchemsino.com/d/files/dupokonariduvo.pdfIn PDF document text
    • http://jamones-luna.shopcloud.es/ckfinder/userfiles/files/lubifar.pdfIn PDF document text
    • https://ibeguiristain.com/userfiles/files/janipemopiworep.pdfIn PDF document text
    • http://aftckwt.com/uploads/file/23465294921.pdfIn PDF document text
    • https://hotellemaritime.com/hotel/upload/files/48876700534.pdfIn PDF document text
    • http://basaritarim.net/admin/editor_resim/file/jamiserij.pdfIn PDF document text
    • https://chatsystem.site/js/ckfinder/userfiles/files/labexosa.pdfIn PDF document text
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614ce1e83fef4---megomabotosonebotub.pdfIn PDF document text
    • https://ln80.cn/filespath/files/20210917061236.pdfIn PDF document text
    • https://meesens.be/KrMee/Tekstverwerker/55182364960.pdfIn PDF document text
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b4d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB4D5 17852 bytes
SHA-256: f00490855f2960af76749588b2ac370b49ef32376bd01e5a6f334df5b958c00a
font_01_sfnt_off0000e31d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE31D 10680 bytes
SHA-256: ed583612d35db1552c5dbc390a192dcecd5ecc732b0eab1e406edb9f318dd207
font_02_sfnt_off0000fb9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB9F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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