Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0d0742e8e9a1501…

MALICIOUS

PDF

82.8 KB Created: 2021-09-02 08:06:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: c0408a365a2e6c4e977b082cd68ae087 SHA-1: ed51629df7e57dc1a3b51d684a8e2d815ecbc1b2 SHA-256: d0d0742e8e9a15011f63fada20ebe0e3a5767d5ab9ea3f24eb384356b375822f
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links, many pointing to compromised WordPress sites and other unknown domains, suggesting it functions as a link farm or phishing lure. The PDF structure and embedded links are consistent with attempts to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aed99ba1db9---26119375020.pdf In PDF document text
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/b9t3dej8q5orcjapc9bgoo337u/99660175100.pdfIn PDF document text
    • http://polymer-optix.de/userfiles/file/24046518343.pdfIn PDF document text
    • http://thelonerangerfanclub.com/ckfinder/userfiles/files/81298205809.pdfIn PDF document text
    • https://ht-cooling-j3t.com/contents//files/rukeneke.pdfIn PDF document text
    • http://logiccpacma.com/ckfinder/userfiles/files/gumatar.pdfIn PDF document text
    • http://ats-dz.com/userfiles/file/67543785291.pdfIn PDF document text
    • http://extracam.es/app/webroot/arxius/file/22244905931.pdfIn PDF document text
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a405c97e1d1---80828855124.pdfIn PDF document text
    • http://wojno-stal.pl/pliki/file/bamojosirukinevezade.pdfIn PDF document text
    • http://sunrui-ti.com/d/files/26157641961.pdfIn PDF document text
    • https://condicionamentofisico.com/arquivos/file/6569177830.pdfIn PDF document text
    • https://semut73.com/contents//files/mezawo.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/2c84c77d3616c051a1f23633c2316dad/69367725173.pdfIn PDF document text
    • http://kennyre.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cd226472941---81713549528.pdfIn PDF document text
    • https://saraelv.no/wp-content/plugins/formcraft/file-upload/server/content/files/160bc54bc21d80---28589047400.pdfIn PDF document text
    • http://asbufestival.com/uploads/FCK_files/file/52767439301.pdfIn PDF document text
    • https://anbuadidravidarmatrimony.com/ckfinder/userfiles/files/pejufunawe.pdfIn PDF document text
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb3cc010f67---zugokamu.pdfIn PDF document text
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/1607308090765e---gogusesakazedasiditexit.pdfIn PDF document text
    • https://bursakaynak.com/userfiles/file/2387572034.pdfIn PDF document text
    • http://hilltop1976.com/clients/24685/File/7955680145.pdfIn PDF document text
    • http://pkynfe.net/userfiles/file/jexikikigused.pdfIn PDF document text
    • https://visaonline-vn.com/wp-content/plugins/super-forms/uploads/php/files/r8imi1gba03ovqovu6vioa36ub/takotawigoxuzaxonakoruw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=4+inch+pvc+pipe+bendPDF 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_off0000e0f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0F1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f903.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF903 17560 bytes
SHA-256: 50e3ea110492be5d3ad7f94a9d488795cee868fe96c4171c0e05aa039f8bab6c
font_02_sfnt_off00012698.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12698 10104 bytes
SHA-256: b487d91c05cd92889ce26dc145478f0eb6fc218b59d0d1aa4952256e0d090734

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