Malicious PDF — malware analysis report

Static analysis result for SHA-256 438d6cc46a1724b7…

MALICIOUS

PDF

72.8 KB Created: 2021-02-10 17:26:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: e051b13e2a46b1d0b5d0f4fbd0643846 SHA-1: b9ea0edb04157469b0c263c48d65537e16f98626 SHA-256: 438d6cc46a1724b7e526e1f9d0e94d5134080c1637047de7339023cc4fdc4d4a
244 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/123?utm_term=america+pathways+to+the+present+chapter+11+pdf In PDF document text
    • http://formverifiedbadge.com/dmv_ny_written_test_languagesonx0b.pdfIn PDF document text
    • https://pinobuni.weebly.com/uploads/1/3/0/9/130969003/desugowelun-fiwawosizoji-tajukenamuf-wuvigemobuwew.pdfIn PDF document text
    • https://jisiresofuwidi.weebly.com/uploads/1/3/0/7/130739297/53e86f2342f24e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427799/normal_5fe1811ab1bd4.pdfIn PDF document text
    • http://socialwave.me/704723163047tau.pdfIn PDF document text
    • https://jizufozerujit.weebly.com/uploads/1/3/4/3/134343201/6d05cc0c2.pdfIn PDF document text
    • http://front-glass.website/814502865782818m.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488335/normal_5fcb3b60afb88.pdfIn PDF document text
    • https://lopiranurepo.weebly.com/uploads/1/3/4/7/134735856/tuxafowome-jagisawa.pdfIn PDF document text
    • http://1green.space/58533050610vlk1r.pdfIn PDF document text
    • https://baxemazone.weebly.com/uploads/1/3/0/7/130739829/84e6c648e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368235/normal_601cbbe20e276.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/voxulija/68357525159.pdfIn PDF document text
    • https://s3.amazonaws.com/fejififimaketo/49573895641.pdfIn PDF document text
    • http://gelutosedufom.epizy.com/lesson_2_classifying_matter_answers.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_off0000de56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE56 5600 bytes
SHA-256: fbe86c83cd502e77ba3a7615cadbeac58c820e47c753bdf9da335d588b189577
font_01_sfnt_off0000f153.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF153 11180 bytes
SHA-256: 9e7b0c1039355872634113aefd9d64b2f748f9fc7788a35a2de5c184737214f6

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