Malicious PDF — malware analysis report

Static analysis result for SHA-256 7109b9a908fc9284…

MALICIOUS

PDF

81.5 KB Created: 2021-03-19 04:29:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 07dd7cebb9609557b415c1344d875e19 SHA-1: d48a7a306e6b57ce70827ce6addf4a9251164b53 SHA-256: 7109b9a908fc9284129727472730d663622e98986cd824524a4adc42d01aba41
126 Risk Score

Malware Insights

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

This PDF document is classified as malicious and contains multiple embedded URLs, one of which, 'https://vilenefex.ru/strik?utm_term=how+to+get+a+counterbalance+forklift+licence', is flagged as suspicious. The document's content and structure suggest it is designed to trick users into visiting external sites, likely for phishing or malware distribution. No scripts were extracted, but the PDF structure and URL usage are indicative of a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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 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://vilenefex.ru/strik?utm_term=how+to+get+a+counterbalance+forklift+licence PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4403407/normal_5fda4c024707f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387430/normal_6013817b00418.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450251/normal_60076b9e9b299.pdfIn PDF document text
    • http://bixorusinalabi.22web.org/bewisowopijirusesufe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473047/normal_5fd7ba5ae875c.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/cc36cb3a-a69c-4afa-88e6-249380c976f3/turafu.pdfIn PDF document text
    • http://midotujeg.rf.gd/9265783316.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a13871e4-7b09-424a-a72f-0d689f87d317/33280675520.pdfIn PDF document text
    • https://s3.amazonaws.com/dekogamik/61364981889.pdfIn PDF document text
    • http://juwovupo.rf.gd/32574239057.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d32c059-b0dd-4cd3-8233-d21800594b28/sivepaledezagami.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2bee68c-3842-4915-ad2e-596157eabf4a/32083423900.pdfIn PDF document text
    • https://s3.amazonaws.com/nonabafat/how_many_pages_are_in_the_communist_manifesto.pdfIn PDF document text
    • http://diwejijozijigez.rf.gd/21567830414.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9d2d062-223c-4dae-a52f-cd2ef20fd24f/7865410401.pdfIn PDF document text
    • https://s3.amazonaws.com/xuxifuzituwu/how_do_i_use_google_maps_on_my_apple_watch.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a644036-c5fc-4bee-b65f-166af04f5d93/80585083911.pdfIn PDF document text
    • https://s3.amazonaws.com/kefiperizonofu/hrk_physics_5th_edition_volume_1_solution.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d194032-50ac-40e6-9f55-b8b9bac52f58/bugobugowigub.pdfIn PDF document text
    • https://s3.amazonaws.com/belapawerezuju/39864217711.pdfIn PDF document text
    • https://s3.amazonaws.com/dazifozixawus/54015672035.pdfIn PDF document text
    • https://s3.amazonaws.com/jewizopukuni/what_do_black_ribbons_symbolize.pdfIn PDF document text
    • https://s3.amazonaws.com/nupotukig/short_resignation_letter_effective_immediately_template.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_off0001001c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1001C 5128 bytes
SHA-256: 29f8d638eb0408926701bec13136742113f3b0784e9f32519ad796593fc9208d
font_01_sfnt_off000111bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111BD 11420 bytes
SHA-256: ab05cb61b162c9a49b539c8014c14efc785a0d4c5e441eca860d7a63caf6e414

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