Malicious PDF — malware analysis report

Static analysis result for SHA-256 eab3eb270978280c…

MALICIOUS

PDF

75.5 KB Created: 2021-02-25 07:10:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 15e490b7166e401f4aac8e802bdfc084 SHA-1: 9c0f503621c08e7fb8fd72a0361a113355298971 SHA-256: eab3eb270978280cb3358cfc4b034345cc0bf79303f082ceb9d7f7bdc782ce1e
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, with one prominent URL pointing to 'maypoin.ru' which is likely a phishing or malware distribution site. The document body, though heavily obfuscated, suggests a lure related to drawing tutorials, a common tactic for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://maypoin.ru/strik?utm_term=how+to+draw+a+realistic+female+head+shape PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4529780/normal_602de3370c884.pdfIn PDF document text
    • http://mbfsopg.com/barrons_ap_statistics_8th_edition0uv5k.pdfIn PDF document text
    • https://cdn.sqhk.co/nixivezez/fpgjfjh/scary_doll_fake_call_joke_download.pdfIn PDF document text
    • https://zafasasuk.weebly.com/uploads/1/3/4/7/134713251/5e364d206cc5c.pdfIn PDF document text
    • http://floradoma.net/fashion_report_ffxiv_week_68io6cu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4529087/normal_60192c043eb8e.pdfIn PDF document text
    • https://goxanakevixi.weebly.com/uploads/1/3/4/8/134857001/kenoxarunereroraku.pdfIn PDF document text
    • https://cdn.sqhk.co/mojafefegamo/Dh4vYgi/33389685275.pdfIn PDF document text
    • https://cdn.sqhk.co/dojidavos/WhaUX3j/16823159671.pdfIn PDF document text
    • https://duvutotan.weebly.com/uploads/1/3/0/7/130775700/46352d20366.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420454/normal_5fd632fcdb665.pdfIn PDF document text
    • http://kihepc.xyz/nkjv_bible_buy_online5p1g3.pdfIn PDF document text
    • http://businesslinecenter.com/nugeretoknttwt.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420434/normal_5fecf403d687f.pdfIn PDF document text
    • http://gobigs.space/is_applied_calculus_harder_than_calculus13zqm.pdfIn PDF document text
    • https://zodoxofavuzawa.weebly.com/uploads/1/3/1/4/131437464/kegomaxupoziwex-zupopedipefu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000e9d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9D4 5448 bytes
SHA-256: c88c3e4c452a3733668e6eaf866e3dcfeb793c9a85d83ac26d64c6b26e536c8d
font_01_sfnt_off0000fc41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC41 10804 bytes
SHA-256: 5e80136dcd8dd7cf1ceef7d5c57a0fc4eb7dd7150116988f7dfe9ffacb24e997

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