Malicious PDF — malware analysis report

Static analysis result for SHA-256 94de5ea2ca739b3c…

MALICIOUS

PDF

76.0 KB Created: 2021-02-22 22:03:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 6fedcf1c79bcfa1db1c5e28a08026d1c SHA-1: de5563d5b6c3bb3c1cfa9a37bfb51be705fe8466 SHA-256: 94de5ea2ca739b3c341262000ff68dcf8ab8e4014616663005d3803c9e89f22f
186 Risk Score

Malware Insights

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

This PDF document is identified as malicious by multiple heuristics and a machine learning classifier, indicating a phishing or trojan distribution attempt. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. The document body, though heavily obfuscated, appears to be a lure related to 'screen repair'. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • 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://seumenha.ru/wb?keyword=where%20can%20i%20get%20my%20screen%20fixed%20for%20cheap PDF link annotation
    • http://lnstagram-blue-ticks.com/xaxix6urum.pdfIn PDF document text
    • https://pijolonaponezu.weebly.com/uploads/1/3/4/8/134879261/9d3af06b0bc.pdfIn PDF document text
    • https://lesamasipedu.weebly.com/uploads/1/3/0/7/130739144/4087f7.pdfIn PDF document text
    • http://vanlit.ru/29505493453dw7j1.pdfIn PDF document text
    • http://smartradiobf.ru/bokaro_general_hospital_blood_reportuwvlr.pdfIn PDF document text
    • http://consequences.space/toyota_carina_1990_manual6rxvl.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379483/normal_60319646a766d.pdfIn PDF document text
    • https://vagonegasix.weebly.com/uploads/1/3/1/4/131482995/ae8a2f04eabdc0.pdfIn PDF document text
    • https://nepuvojikonutoz.weebly.com/uploads/1/3/4/6/134677469/c371f.pdfIn PDF document text
    • http://gayerkan.com/elk_m1_manualnpyke.pdfIn PDF document text
    • https://popetufuwude.weebly.com/uploads/1/3/1/4/131483025/rawulesiri-manalawomaxe-witopupevi-lowapid.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366362/normal_5fc931bced406.pdfIn PDF document text
    • http://muldwych.com/306712541309mqgk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367631/normal_5fc5e59f5bb23.pdfIn PDF document text
    • https://zefisazivite.weebly.com/uploads/1/3/5/3/135314851/448322.pdfIn PDF document text
    • https://baginemesurewis.weebly.com/uploads/1/3/1/3/131380932/121195.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
    • http://gogolozumer.epizy.com/dental_anatomy_coloring_book_free.pdfIn PDF document text
    • http://vigorawosimop.rf.gd/91534307854.pdfIn PDF document text
    • http://tifureboriva.epizy.com/dedajimivonusiluxire.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_off0000dd19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD19 5508 bytes
SHA-256: e8be1fccc259414f6b2000842d8c7a3e154942bd748544926b78f31ce5313d7a
font_01_sfnt_off0000efb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFB8 10832 bytes
SHA-256: cf3b9609c6690d8c0789131a58d3d4a93d1ac0f90effe981122c6a98043881d0
font_02_sfnt_off00011495.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11495 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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