Malicious PDF — malware analysis report

Static analysis result for SHA-256 229d648f684c8875…

MALICIOUS

PDF

75.9 KB Created: 2021-09-04 19:06:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: e6b743a3a9ad38477e5fc3b96e6924f1 SHA-1: 3c0ec85b0ff5a5b329a5bca665e8eb01155a9122 SHA-256: 229d648f684c88757d590d400cf98b77b7b9cb986f5b35c2b3afec91c9fe0135
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. It contains numerous links, many pointing to compromised CMS upload directories, suggesting a link farm designed to redirect users to malicious sites. The PDF's structure and the presence of external URIs strongly suggest it's used as a lure to initiate further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 6

  • 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.
  • 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://www.albispanaderia.com/wp-content/plugins/super-forms/uploads/php/files/95870038a8e5ecb480d0199302f42644/gulafivatid.pdf In PDF document text
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4b005833b1---mutufanuxasomedik.pdfIn PDF document text
    • http://baschin-heizung.com/meineBilderAlbertGrundschule/file/sofilet.pdfIn PDF document text
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/16081cf8eb545e---61742420917.pdfIn PDF document text
    • https://mimpishio1.com/contents//files/tewilugusepibapiriv.pdfIn PDF document text
    • http://kayamedbursa.com/userfiles/file/73857553902.pdfIn PDF document text
    • http://basaritarim.net/admin/editor_resim/file/39700615013.pdfIn PDF document text
    • http://abwclayton.com/uploads/files/80837068097.pdfIn PDF document text
    • http://lussoleathertiles.com/test4/EDITOR/example/v2/userfiles/file/rafubewipi.pdfIn PDF document text
    • http://uniondrygoods.com/fckeditor/userfiles/file/6673834914.pdfIn PDF document text
    • https://118highschool.am/wp-content/plugins/super-forms/uploads/php/files/587a64704520ef08cad2e91d14736cfe/17541039831.pdfIn PDF document text
    • https://www.varishastalari.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f49957b052---tapudonedubifefa.pdfIn PDF document text
    • https://www.willmarareachamber.com/ckfinder/userfiles/files/37391519882.pdfIn PDF document text
    • http://jungvassar.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/8913210128.pdfIn PDF document text
    • https://www.fmworks.com.tr/wp-content/plugins/super-forms/uploads/php/files/ur0jpvm041u4na9lep1sl18geh/95722094141.pdfIn PDF document text
    • https://www.chinacimctrailer.com/wp-content/plugins/super-forms/uploads/php/files/c90a7710c367ef3817676d1c00383e80/97886347173.pdfIn PDF document text
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c555579b1f7---rovipitulofojozo.pdfIn PDF document text
    • https://intersat.lv/files/file/24875324349.pdfIn PDF document text
    • http://www.expo-hotel.com/english/wp-content/plugins/formcraft/file-upload/server/content/files/1606d636ab1f89---1182834866.pdfIn PDF document text
    • http://indecomavo.pl/inc/vibeparilenabuje.pdfIn PDF document text
    • http://ivepe-elearning.gr/assets/UserFiles/mainHome/file/gunepofosovimamixuposoxav.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=album+historia+natural+jet+pdfPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c2a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2A9 11116 bytes
SHA-256: ab4a45de689ad194a0ad93d34c012b7b78afd20fd4a640de8e14f8885d6b25cf
font_01_sfnt_off0000dc1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC1C 17820 bytes
SHA-256: 94039448f0018040f490293447597bdd253056cffc331df0e2ea78bde9bc9aca
font_02_sfnt_off00010a48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A48 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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