Malicious PDF — malware analysis report

Static analysis result for SHA-256 09a34a317a2d318c…

MALICIOUS

PDF

77.8 KB Created: 2021-03-02 17:28:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: c8e53bad9ca6b38ef00336661ab62a50 SHA-1: dfb67bf14bd51d07f672bff55c53bb80972b0a8c SHA-256: 09a34a317a2d318c7c9f5c2b319932589935b735571f870ea9d54ba79a356934
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged as malicious by multiple heuristics and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to PDF files, suggesting a link farm or redirection mechanism. The primary external URI points to a URL that appears to be part of a phishing or scam campaign, using keywords to potentially entice clicks. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://mezovuduw.ru/award?keyword=how+often+should+a+treadmill+be+serviced PDF link annotation
    • http://wifunagidoli.mypressonline.com/kinepafasojeribilipowof.pdfIn PDF document text
    • https://ganulexotugoris.weebly.com/uploads/1/3/1/1/131164012/fd671e.pdfIn PDF document text
    • https://jegewovujukevu.weebly.com/uploads/1/3/4/5/134507091/8324067.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426828/normal_5ffdc2ec9369a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417418/normal_601560ec3c38f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388274/normal_5feba4ce72a1f.pdfIn PDF document text
    • https://toverumu.weebly.com/uploads/1/3/0/8/130815437/zoxixagunev-ropajariwagel.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388280/normal_5fceed6c63ebd.pdfIn PDF document text
    • https://gezumadugoviful.weebly.com/uploads/1/3/4/6/134611133/govubazivedama.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369495/normal_5fc84466528b0.pdfIn PDF document text
    • https://cdn.sqhk.co/mitebosareki/hghfqUt/titan_360_slot.pdfIn PDF document text
    • https://dojufewuwi.weebly.com/uploads/1/3/4/2/134235401/nuper_zatinujew.pdfIn PDF document text
    • http://zakewabo.scienceontheweb.net/2018_forester_review_car_and_driver.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vexabimumemig.atwebpages.com/conversion_de_llaves_de_pulgadas_a_milimetros.pdfIn PDF document text
    • https://s3.amazonaws.com/sugowubuf/retafexironati.pdfIn PDF document text
    • https://s3.amazonaws.com/jazuravazaguz/89487011149.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f3f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3F7 5516 bytes
SHA-256: 605669fb0fb775340c87952f50f75e217faa70c0bf00bf7dfad0fa1eb78f17d3
font_01_sfnt_off000106a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106A1 10412 bytes
SHA-256: 37812a6753f14c3709988484cbd91a0ec72d1d130211b734bd38d7ac74cc8019

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