Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc9ac21c3e32bf6e…

MALICIOUS

PDF

71.3 KB Created: 2021-03-20 17:55:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 3356bbbad69c644cf58c2a0830213592 SHA-1: 6d3967c96f7a0c543c8045b4c7f1109c720b3c4d SHA-256: fc9ac21c3e32bf6e71f4466587c063c72bb66b7d6d3163b0e41b5647c71ce873
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external URIs, many pointing to disposable hosting, suggesting a link farm or phishing operation. The presence of a URL like 'https://kuzutuzo.ru/wix?keyword=pokemon+go+latest+apk+download+apk+mirror' indicates a lure to download potentially malicious software. No scripts were extracted, but the PDF structure and numerous links strongly suggest a phishing or malware distribution attempt.

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://kuzutuzo.ru/wix?keyword=pokemon+go+latest+apk+download+apk+mirror PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4393018/normal_5ff782d21bf4c.pdfIn PDF document text
    • https://kosemezaped.weebly.com/uploads/1/3/4/7/134711049/7180413.pdfIn PDF document text
    • http://wamikesaximilub.22web.org/tactical_voting_guide_uk.pdfIn PDF document text
    • http://xofenejilomoz.iblogger.org/how_to_use_an_egg_cooker.pdfIn PDF document text
    • http://boost-shop.xyz/pexazudoxivowegewewa9h6rv.pdfIn PDF document text
    • https://sikenobavusemel.weebly.com/uploads/1/3/2/6/132682861/wudidonubopowi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421210/normal_5fffe53171938.pdfIn PDF document text
    • https://mafugefowodofo.weebly.com/uploads/1/3/1/3/131378796/gelodonubaduwukore.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389604/normal_5ff45e89cd778.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479684/normal_5fdbfa60f331c.pdfIn PDF document text
    • http://nizozipup.22web.org/gmail_email_as_attachment.pdfIn PDF document text
    • http://igcopyrightforhelps.com/among_us_mod_for_minecraft_2020._1026zhb.pdfIn PDF document text
    • https://nazumuliwoj.weebly.com/uploads/1/3/1/3/131383416/4555991.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369189/normal_604d02603f482.pdfIn PDF document text
    • http://bcpzon4segurabetaviabcp.com/tikiguvujupekomidakitrwph.pdfIn PDF document text
    • https://cdn.sqhk.co/lupobikud/bjkgdie/84049443416.pdfIn PDF document text
    • https://cdn.sqhk.co/moturalogupe/iaNuNie/18125912237.pdfIn PDF document text
    • http://lufawobakisi.22web.org/44877183030.pdfIn PDF document text
    • http://topemuliras.22web.org/36767775370.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://luzadewo.epizy.com/think_and_grow_rich_by_napoleon_hill_amazon.pdfIn PDF document text
    • http://dipulitexaxuz.epizy.com/dark_knight_returns_movie_cast.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_off0000d7f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7F4 5436 bytes
SHA-256: d20b54bb29eed63567d1f3b021ec2e70dc65da9b31039ae503c18183f3b75454
font_01_sfnt_off0000ea71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA71 10384 bytes
SHA-256: 3ee899d62ac2424df7aef3cebfefcddd09d4be174a39053b5f77c6df204010e5

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