Malicious PDF — malware analysis report

Static analysis result for SHA-256 46a0d3dfa9f95779…

MALICIOUS

PDF

76.3 KB Created: 2021-06-01 10:52:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 6ff39c1d997d255747a415ecd88c7903 SHA-1: 81471919143cbb1c0035a541515f455a8aed1bad SHA-256: 46a0d3dfa9f95779c6d2d9c720bbc2ac68c9721e2e34e7c39b45f4304982a882
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are hosted on dynamic DNS or free hosting services, suggesting a link farm or phishing operation. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically related to phishing. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://pixomot.ru/pbw?utm_term=install+ipa+file+on+iphone+jailbreak PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4481155/normal_5fc99f52ab4af.pdfIn PDF document text
    • https://siropenisawad.weebly.com/uploads/1/3/4/3/134353493/1719674.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380384/normal_605f3613db583.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391319/normal_604ae5ba76831.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4505096/normal_5ffb4bd8e6a8b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460983/normal_6005055d06479.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386347/normal_5fe10231c22f5.pdfIn PDF document text
    • https://kosigejobawazi.weebly.com/uploads/1/3/4/3/134315380/vavudu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388060/normal_603f400449cc7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427529/normal_601b8de787cd6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413982/normal_5feeef19c7660.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383802/normal_5ff3ef8015937.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lugozamuxika.pbworks.com/w/file/fetch/144412251/reversionary_life_estate.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f43d405-7b5b-4eac-a4c4-d65aa0262368/asus_z97-a_usb_3.1_bios_update.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/913352cf-a777-4247-8d4e-eeb37b08d844/dyson_absolute_dc17_how_to_use.pdfIn PDF document text
    • http://jajisaparev.pbworks.com/w/file/fetch/144420660/antes_que_anochezca_pelicula_en_espaol.pdfIn PDF document text
    • http://wiwedano.pbworks.com/f/53282086227.pdfIn PDF document text
    • http://jesababa.pbworks.com/f/14908003733.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_off0000eba6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBA6 5208 bytes
SHA-256: 2b2b61023e645ecf60039fc73b6046da99dffee725785e217309265c3e2c7d88
font_01_sfnt_off0000fd52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD52 10976 bytes
SHA-256: a1108ff4401fdcf542427f1242873d21e326e9b26c9cd4edeebd4d9ca0e65fbc

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