Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f902fd35bf20805…

MALICIOUS

PDF

77.7 KB Created: 2021-04-02 14:18:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: a43e3c2cc6e9aedfe547ab5edc00cf50 SHA-1: c196a3010d9275310996b9b388e26fabb822f88f SHA-256: 6f902fd35bf208051e0e870040d36492ae596093f00cdf83d460923010414347
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 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://soxebez.ru/123?utm_term=country+roads+alto+sax+sheet+music PDF link annotation
    • http://tipijijajofupi.sportsontheweb.net/nifubu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468837/normal_6021a34ee881f.pdfIn PDF document text
    • http://giwapozolaleg.mypressonline.com/xawamuko.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451766/normal_5fceba42dfe73.pdfIn PDF document text
    • http://nitanupemil.mygamesonline.org/pirurago.pdfIn PDF document text
    • http://ita-talia.fun/what_are_some_strengths_and_weaknesses_of_a_nursejwhj8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417314/normal_5fcd3a9fc2583.pdfIn PDF document text
    • http://kutufirix.iblogger.org/how_to_prove_adultery_in_the_military.pdfIn PDF document text
    • http://mufutekuson.getenjoyment.net/ruxebagepugulelizutugox.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420237/normal_606518b07c4c3.pdfIn PDF document text
    • http://ijmalan.xyz/582278391905kp68.pdfIn PDF document text
    • http://1green.space/1417841578222h31.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453560/normal_6045722b408e5.pdfIn PDF document text
    • http://gazedalepi.sportsontheweb.net/85428587512.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372076/normal_6023f04c0eff4.pdfIn PDF document text
    • http://gapuzenum.22web.org/minuvixevu.pdfIn PDF document text
    • http://jakor.pro/18273798897ohvwl.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kovusilo.epizy.com/xisapapufo.pdfIn PDF document text
    • https://48cc712b-de5e-493e-a198-f8962849e22b.filesusr.com/ugd/d2751c_bf30987828de438881ba14f77bc30123.pdf?index=trueIn PDF document text
    • http://kuzibawo.rf.gd/acrobat_pro_free_trial.pdfIn PDF document text
    • https://828c6a01-da61-4814-986a-f72e64f4f334.filesusr.com/ugd/cdfdba_a292e084bb46409ea27ff3b377ae503b.pdf?index=trueIn PDF document text
    • http://wakafovoda.epizy.com/43579446473.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE7B 5252 bytes
SHA-256: 4cf7579c0c05588dd63e647bcd18883f0d6c132cd6f652733afc02e00adc8f97
font_01_sfnt_off00010038.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10038 11964 bytes
SHA-256: 0bc1cfef747dad5a142a24b8da9bdec678fdf1dc303543cfc762dae5e1e7e645

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