Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8891936b6ac6842…

MALICIOUS

PDF

76.9 KB Created: 2021-03-13 17:28:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: cabdd558a77997a818c922f275eb7500 SHA-1: 23a09237551a2ba2fe525389fb94af8dffb717ff SHA-256: b8891936b6ac684273659043c05d7fca20a25fbf80221de25be84b2c17ad6b78
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9997

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://golowaki.ru/123?utm_term=destiny+2+season+of+opulence+chalice+guide PDF link annotation
    • http://zonizubiro.getenjoyment.net/94399870307.pdfIn PDF document text
    • https://dojifidixiwaji.weebly.com/uploads/1/3/4/3/134372722/6519635.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473379/normal_5fee43c50ef5d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412151/normal_5ff88f5d1d3f1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486521/normal_601fa1996da35.pdfIn PDF document text
    • https://cdn.sqhk.co/tatidukigag/iihigg3/37993643935.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448341/normal_6022baf94da36.pdfIn PDF document text
    • https://molawaxurot.weebly.com/uploads/1/3/4/6/134699933/womozalumo_wogujoreda_buloxoju_liveg.pdfIn PDF document text
    • https://cdn.sqhk.co/vapezuwe/7EgjfJN/alone_season_6_jordan_now.pdfIn PDF document text
    • https://cdn.sqhk.co/lewikokezina/ggjfnup/new_memes_2020_stickers.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4504870/normal_6022d2f6236d6.pdfIn PDF document text
    • http://kefudepoduwudi.sportsontheweb.net/tibajetu.pdfIn PDF document text
    • https://cdn.sqhk.co/jaziwuke/chaziim/4848280255.pdfIn PDF document text
    • https://gadonivoxe.weebly.com/uploads/1/3/5/3/135331758/guresulow.pdfIn PDF document text
    • https://cdn.sqhk.co/nixafusoda/gfhajfb/75608938129.pdfIn PDF document text
    • https://nuvutujozexavu.weebly.com/uploads/1/3/4/1/134131277/nesedumu_zesaseguparo_verufavo.pdfIn PDF document text
    • http://vivubowi.getenjoyment.net/60912515038.pdfIn PDF document text
    • https://weritesi.weebly.com/uploads/1/3/5/3/135314652/ralikapuje-gopuxagifinozi-xivevafevivag.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://3bcdeb60-9876-4d14-bc0a-1dd1632c647c.filesusr.com/ugd/16a96a_9a6b3c3c58044424bee4ea77c3c85315.pdf?index=trueIn PDF document text
    • http://josuxak.atwebpages.com/17522451991.pdfIn PDF document text
    • https://2ed821ec-8078-4e74-b11b-c5cec6a88262.filesusr.com/ugd/65e777_9e181c261a7a45368731e258b7949756.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_off0000ee2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE2F 5552 bytes
SHA-256: 65ab0228cab5bcce42aa7e470f21410ccafa1a4d650a1347befce3b1db9a0b0f
font_01_sfnt_off0001011e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1011E 10780 bytes
SHA-256: 02fddaf3140a7e832380ec67184e92c277c7559df9bcc4a1d698a6bcabe6ca22

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