Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1084eaed4ed01b5…

MALICIOUS

PDF

70.8 KB Created: 2021-03-08 09:58:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 96f71b2c834632c475fdb3baec13525d SHA-1: db871281b2e3098e869fb12c21edabb56eda04f4 SHA-256: c1084eaed4ed01b52897351eef8f108cdb28dfa39e7bf4aa3783fa21309606a7
126 Risk Score

Malware Insights

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

The PDF file contains numerous links to external websites, many of which are hosted on disposable domains and appear to be part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The embedded URLs suggest an attempt to redirect the user to potentially malicious content.

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 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://gimoguvi.ru/award?keyword=dunkin+donuts+cinnamon+coffee+roll+k+cups+calories PDF link annotation
    • http://fakts.design/21194694974ygbb7.pdfIn PDF document text
    • http://nipokaxa.getenjoyment.net/69072909406.pdfIn PDF document text
    • http://twitter-center.com/jovodekumafezeretijqtyze.pdfIn PDF document text
    • http://vvd.bar/96014234183ztq61.pdfIn PDF document text
    • http://electorat.org/magorexideralurerav0r0sr.pdfIn PDF document text
    • http://kepalimis.22web.org/vijevokezularuvifi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422137/normal_6004dd6658523.pdfIn PDF document text
    • http://dogalijun.scienceontheweb.net/danizejatege.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426822/normal_6032b83198dc7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448129/normal_60303c2f350fb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486994/normal_6045694897228.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4526930/normal_6021c9bbf0e92.pdfIn PDF document text
    • http://miworusak.iblogger.org/67315844605.pdfIn PDF document text
    • http://blog-millionaire.buzz/jawibukawifizelifizafu20gk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xilibosukotijob.epizy.com/8051899353.pdfIn PDF document text
    • http://nejesezape.myartsonline.com/78234137726.pdfIn PDF document text
    • http://zopefunexot.epizy.com/beyond_meat_earnings_report_forecast.pdfIn PDF document text
    • http://zepibugab.rf.gd/zidexutanumimakapiwut.pdfIn PDF document text
    • https://s3.amazonaws.com/vibuvomomuv/jusifinulilojof.pdfIn PDF document text
    • https://s3.amazonaws.com/sazixipame/6127822671.pdfIn PDF document text
    • http://dapuseda.rf.gd/alex_rider_movie_wiki.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_off0000d777.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD777 5364 bytes
SHA-256: 0e4b874af7c1e7e220f1438ceb9c602e0a5b6ceba4c97c4ee7f81b9dbe93928c
font_01_sfnt_off0000e9aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9AA 10384 bytes
SHA-256: d5607b1b90e1ee3eb4e310f41141097c4525a0bfc19ac02742cd7cdf8583d131

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