Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e1832addc9b9eca…

MALICIOUS

PDF

94.3 KB Created: 2021-07-24 01:30:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: b804a8f4efce9a84d780bb6393f0fc22 SHA-1: 79797924a4f5e6eb958f2c20074045c5c726fec7 SHA-256: 0e1832addc9b9ecad044f8efe51af20d0f32d8791d053cbe84722ae5559d21a0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised WordPress upload storage and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The PDF structure and embedded links are indicative of a phishing or malware distribution campaign, likely leveraging a spearphishing attachment as the initial access vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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.hit-education.com/wp-content/plugins/super-forms/uploads/php/files/7occu0rsbl5dshgrssmlhnqe7q/74340661386.pdf In PDF document text
    • http://velkoobchod-man.eu/ckfinder/userfiles/files/modovixujatamatetodezoli.pdfIn PDF document text
    • http://trimblehighalumni.com/clients/84492/File/34043922530.pdfIn PDF document text
    • https://topinsolventa.ro/userfiles/file/lopenesofax.pdfIn PDF document text
    • https://hartwellcook.com/wp-content/plugins/super-forms/uploads/php/files/d528a03026f790bf01c6db5c5294c8c2/bavubewobawe.pdfIn PDF document text
    • http://guoyangmoju.com/userfiles/files/fuzanabirob.pdfIn PDF document text
    • https://sellos-mecanicos.com/wp-content/plugins/super-forms/uploads/php/files/b6f9a139d96a37db196e163844345b36/posetatabifiwija.pdfIn PDF document text
    • http://wearefamilypalestine.com/clients/3/3b/3bc38fc23f9ffb54b20226cbd6ad6ce3/File/76379807782.pdfIn PDF document text
    • http://belean.pl/userfiles/file/kiviruvedijojuvamem.pdfIn PDF document text
    • http://vishwkarmaenterprises.com/webroot/img/userfiles/files/63052197705.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/qgk4r7abiv6td9hp48v8hq9veo/49303211945.pdfIn PDF document text
    • https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e93d714fa03---57174287712.pdfIn PDF document text
    • https://www.nordatec.com/wp-content/plugins/super-forms/uploads/php/files/bcpctrqts3sejote39hn1gpijp/wejedunepojezoloruzeg.pdfIn PDF document text
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d4e7f57ad86---94215016083.pdfIn PDF document text
    • http://amadpich.com/userfiles/file/32041322591.pdfIn PDF document text
    • https://autosofortkauf.ch/wp-content/plugins/super-forms/uploads/php/files/d4agsroasj496dru47q79pfkt2/95137492299.pdfIn PDF document text
    • https://auf.vn/wp-content/plugins/super-forms/uploads/php/files/vqcle1f15vjno0rld1mvm0lfc1/29460633934.pdfIn PDF document text
    • https://sedefartphotography.com/resimler/files/19023678441.pdfIn PDF document text
    • http://ezibra.pl/upload//file/nipanupan.pdfIn PDF document text
    • https://asset-books.com/userfiles/file/nipogexapeku.pdfIn PDF document text
    • https://mymovingestimate.com/wp-content/plugins/super-forms/uploads/php/files/b1badd99d9239ab471f56c0368d3176d/26171053558.pdfIn PDF document text
    • http://scissortailfarms.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fb1d044d161---17124944490.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=wie+viele+fragen+gibt+es+bei+f%C3%BChrerschein+klasse+b+insgesamtPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010780.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10780 18160 bytes
SHA-256: 0dc89a00e176d349e55349f1c03347b1e6849011c4b9e4f1e74906d150741090
font_01_sfnt_off000135be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135BE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014dd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14DD5 11148 bytes
SHA-256: 0220459f2238f910149486e7a4f9e806c5a38a6473c10970a69d6fd1f79cfe52

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