Malicious PDF — malware analysis report

Static analysis result for SHA-256 603ccc9281ce421e…

MALICIOUS

PDF

73.2 KB Created: 2021-03-25 08:47:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 2c653b0f68fb5fe3ce17b9d3c22ddfe2 SHA-1: c34c38ff99ee17c20ac3a17d86993264d593f340 SHA-256: 603ccc9281ce421e12d28179921c1726783a315039375f53cc9175ee356c14c0
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to disposable hosting, indicating a link farm designed to direct users to potentially malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document, possibly leveraging embedded JavaScript for redirection or exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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
  • 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.
  • 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://nipisod.ru/123?utm_term=william+branham+sermons+audio PDF link annotation
    • https://lukumupanulafaz.weebly.com/uploads/1/3/4/6/134683212/165fdf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416671/normal_6027c3c15766d.pdfIn PDF document text
    • https://vigajinid.weebly.com/uploads/1/3/4/8/134889024/1ab32725b5f1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459060/normal_6015545d60b11.pdfIn PDF document text
    • http://beremoter.online/bidabizagumesodulip31v3f.pdfIn PDF document text
    • http://my-favshopd.online/domino_s_pizza_village_road_leland_ncq8hal.pdfIn PDF document text
    • https://zadelenipavuluv.weebly.com/uploads/1/3/4/5/134595340/pugevakafosagutoj.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4401985/normal_6000b934e9197.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374976/normal_5fc90deb046f6.pdfIn PDF document text
    • https://mepanomelisegil.weebly.com/uploads/1/3/4/8/134899905/falipulig_ralob_lokexijopoz_kafoxuwusope.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413851/normal_60511fcc148a0.pdfIn PDF document text
    • https://lovapunosarimol.weebly.com/uploads/1/3/5/4/135401421/0f57b.pdfIn PDF document text
    • http://onatural.space/best_virginia_woolf_quotesseo4s.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/03af6f7c-4284-4ad0-9c1c-790622c6f176/sanyo_blu_ray_code_for_universal_remote.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/352f775b-7466-43f1-a83b-44b71d667122/11950955931.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/53c04235-76a3-49c8-9ba7-ce99e844aeec/how_to_draw_a_dog_easy_realistic.pdfIn PDF document text
    • https://08202b68-adf4-4b7d-bb06-fcebe54c78b8.filesusr.com/ugd/76dd3d_1afc83de929c47e49006c23a2efed500.pdf?index=trueIn PDF document text
    • https://dec4a425-646e-450a-80ca-a73a75d058ad.filesusr.com/ugd/ba3095_201bcef1929847fbb5407332b2cdab47.pdf?index=trueIn PDF document text
    • https://9cc02d22-446e-415d-9686-6e49aadcb3b3.filesusr.com/ugd/aa6a08_5c149b94d0c742e49cfb2a88514691e2.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f22213d6-4794-4d65-b92d-ebedde9d9c92/how_to_connect_ipega_controller.pdfIn PDF document text
    • https://91c7bc9f-df77-4dbd-ae51-8bcf521f3e61.filesusr.com/ugd/1df9ea_4f0516dd25084051a95f8576a0a9e8ec.pdf?index=trueIn PDF document text
    • https://bdc3fad0-85dd-4e34-85f7-620d54d4ff6f.filesusr.com/ugd/10cedf_72ce49cb90af44539247423d98f43060.pdf?index=trueIn PDF document text
    • https://7ed754b6-a209-4558-9281-0032c7ee8ade.filesusr.com/ugd/4329d7_0a9c8b60c5634fb5ae22276eecbf441e.pdf?index=trueIn PDF document text
    • https://fb3efafe-1b0e-41a1-9434-8bf556110c4a.filesusr.com/ugd/de5e41_bb08d585088642eaa34a44ad61ce1d8f.pdf?index=trueIn 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_off0000e107.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE107 5220 bytes
SHA-256: ebffe7e0624743bc08940b5dee23d94d8099ecf69c7551894bfa1dff882801fd
font_01_sfnt_off0000f29e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF29E 10704 bytes
SHA-256: d1c906b9475dcefead5992df603ea313182ea314fd0f9211a9472190b40d0cd8