Malicious PDF — malware analysis report

Static analysis result for SHA-256 e19bc662f3f6ee8e…

MALICIOUS

PDF

86.2 KB Created: 2021-08-22 09:17:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: d85fb37de4a055fe6352719aaa816838 SHA-1: dbb7519e484218dae6ac539277bad30efde37cb5 SHA-256: e19bc662f3f6ee8e2e0ffefdcba03fea6950093b2b387e9cfd5a0cf66b2eb446
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a link farm pointing to numerous compromised WordPress upload directories and disposable hosting sites, likely intended to trick users into downloading further malware. The document body is unreadable, but the heuristics strongly suggest a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9945

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://farmaciasacoor.com/site/upload/file/votedotobaburezexuziz.pdf In PDF document text
    • http://www.mondzorgvesa-voorschoten.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1610d408e0e16f---tobemudumovaxurudo.pdfIn PDF document text
    • http://auto-spec.ca/fck/file/49887321726.pdfIn PDF document text
    • https://www.straightmyteeth.eu/wp-content/plugins/super-forms/uploads/php/files/4744c55a1f3ec5a3a3cfa08edba10c57/xarerawibanirutakusatux.pdfIn PDF document text
    • http://csc020.com/userfiles/file/20210807115434_ippuk9.pdfIn PDF document text
    • https://bowenpainter.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610f60fee0f07---neboranezubunenilaku.pdfIn PDF document text
    • http://lavera.it/wp-content/plugins/formcraft/file-upload/server/content/files/160bb73e910f44---rawisabofusedufirujupomod.pdfIn PDF document text
    • https://daquin-ferriere.fr/userfiles/file/vuzilefuxirov.pdfIn PDF document text
    • https://efnnma.org/files/file/volokabinobagowulepu.pdfIn PDF document text
    • http://napiarsaigh.com/images/zizutanurisotugewofubov.pdfIn PDF document text
    • http://www.webtony.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609c2aa4bcc9b---75571795547.pdfIn PDF document text
    • https://www.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090597c6e2c1---biluvokataw.pdfIn PDF document text
    • https://esperanzadeavila.com/fotos/file/zigubukujuruzibezover.pdfIn PDF document text
    • https://fjordancv.info/wp-content/plugins/super-forms/uploads/php/files/864ac5578189f238085b87ab95a414e7/xawevoka.pdfIn PDF document text
    • https://himalayanthailand.com/image/upload/File/vidomener.pdfIn PDF document text
    • https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084f3cbc8e4f---govit.pdfIn PDF document text
    • http://www.hangmandigital.com/files/file/figupolugazilari.pdfIn PDF document text
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f514d267c3---kiwinereruzadegupon.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/ij9rinii4g2djr13u2jjfit0b9/99048295069.pdfIn PDF document text
    • https://big-affaires.com/img/pics/files/bifinoduwofumobag.pdfIn PDF document text
    • http://dom-nenilovo.ru/wp-content/plugins/super-forms/uploads/php/files/6319ed44d8c70db612b0727bceb883bb/juramifidifos.pdfIn PDF document text
    • http://ort168.com/upload//ckeditor/files/35294434000.pdfIn PDF document text
    • http://salocchi.it/userfiles/files/zanita.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=download+battle+trip+seventeen+in+indonesia+sub+indo+bandungPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cf20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF20 19560 bytes
SHA-256: 6a0582a2026f86978408b1004acb0cbe58d1aded57d32ca25d2f3336180cc04b
font_01_sfnt_off0001016a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1016A 16344 bytes
SHA-256: 5cd8a120e106fc2d4fc1855603a636a3ce922decfb1b4d98f17a4a5450337c58
font_02_sfnt_off00011763.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11763 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00012f7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F7A 10960 bytes
SHA-256: d07a5a92c527ab6982c9d5e2b80e72a4a76d1c932789ca91208dcfd44ed04a48

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