Malicious PDF — malware analysis report

Static analysis result for SHA-256 acb019ce014a1d1d…

MALICIOUS

PDF

79.4 KB Created: 2021-03-19 23:17:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: ad2a6e0be7641466abed3406e7202e9b SHA-1: 50aa22ed1a5136c00a4af170b137d6256ac79b38 SHA-256: acb019ce014a1d1d0983008f336233513a29edf6086f01e75fd1edfc516f04ec
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://dafemum.ru/123?utm_term=crystal+report+viewer++for+windows+xp PDF link annotation
    • https://bamojatiw.weebly.com/uploads/1/3/4/6/134699288/6690975.pdfIn PDF document text
    • http://fezanabuxa.22web.org/think_twice_act_wise_meaning_in_hindi.pdfIn PDF document text
    • https://rolurenogilu.weebly.com/uploads/1/3/4/0/134096536/libewa-nudereg-dipunonosor-vimopawiponise.pdfIn PDF document text
    • http://mozujana.22web.org/24161268079.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408862/normal_5fd6999c702f8.pdfIn PDF document text
    • https://lamosafobe.weebly.com/uploads/1/3/5/3/135322951/74eb89b.pdfIn PDF document text
    • http://buvanerupapuko.22web.org/ejemplo_de_minuta_de_una_empresa_sac.pdfIn PDF document text
    • http://vijuziruzunubiz.iblogger.org/puvadav.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415936/normal_5fd797616b1ac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450145/normal_602812c32ee77.pdfIn PDF document text
    • http://kekebum.22web.org/47970958708.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426810/normal_5fe18d589d7ae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448980/normal_6044a572db9b8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/mukut/aulas_basicas_de_ingles.pdfIn PDF document text
    • https://s3.amazonaws.com/bivanud/xikitakejokuj.pdfIn PDF document text
    • https://s3.amazonaws.com/bubisifapagefe/77082551987.pdfIn PDF document text
    • http://defizal.epizy.com/44417908292.pdfIn PDF document text
    • https://s3.amazonaws.com/nilititonawafim/69074055872.pdfIn PDF document text
    • http://dujizadixupodur.epizy.com/tektronix_oscilloscope_tds3014b_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/bejeseja/animated_text_after_effects_free_template.pdfIn PDF document text
    • http://jumerajoge.epizy.com/nesuvovixivameburalubev.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e2c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2C2 5168 bytes
SHA-256: 57f52ae56a3f74aa178de70662baa7fc8f0a76bc8c833885c22faf737c077b35
font_01_sfnt_off0000f481.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF481 14668 bytes
SHA-256: 337b702df0d1e215828d7fbfecd71dfe470e1f2eb60d16f3b8ae7ad22a5b9290
font_02_sfnt_off0001224e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1224E 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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