Malicious PDF — malware analysis report

Static analysis result for SHA-256 336cb9d15aa6656c…

MALICIOUS

PDF

63.0 KB Created: 2021-01-29 16:18:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: fec3db6bc26fc7864bf29d8086ee1159 SHA-1: 15edcb78c8e9fbf1a9512842f59c23cf353293b0 SHA-256: 336cb9d15aa6656caaff40f645deb64090ddd22a7cdc1f0d8603fc05afbc68ed
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or redirection scheme. While no scripts were explicitly extracted, the PDF structure and embedded URLs indicate a malicious intent to redirect users to potentially harmful content.

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://druttle.ru/123?utm_term=smash+4+falco+guide PDF link annotation
    • https://xovuxajewilim.weebly.com/uploads/1/3/0/7/130775567/e4ca474e65ffe.pdfIn PDF document text
    • https://fadufavibog.weebly.com/uploads/1/3/4/8/134889314/xiwelisog.pdfIn PDF document text
    • https://jesasifewom.weebly.com/uploads/1/3/1/4/131453969/vuduxuwavone_rodatinot.pdfIn PDF document text
    • http://onlajn-kassa.ru/code_for_final_boss_punch_outaehhk.pdfIn PDF document text
    • http://dkmz3.club/fundamental_methods_of_mathematical74xcg.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471692/normal_5fef95b67a991.pdfIn PDF document text
    • http://20970907.net/34232816889pocy9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378605/normal_600ece2ce745b.pdfIn PDF document text
    • https://cdn.sqhk.co/notenirikev/xqgcggO/26666841790.pdfIn PDF document text
    • https://pobejatu.weebly.com/uploads/1/3/2/7/132741278/6662753.pdfIn PDF document text
    • https://pejejuwefosewa.weebly.com/uploads/1/3/4/0/134040570/999869.pdfIn PDF document text
    • https://jitebemaduk.weebly.com/uploads/1/3/4/6/134692965/70df8c.pdfIn PDF document text
    • https://vilotirupoj.weebly.com/uploads/1/3/5/3/135328316/vigenogojetotam-pisusolez-keludaligorokan-dufemaxasona.pdfIn PDF document text
    • https://sogazefod.weebly.com/uploads/1/3/4/0/134000298/c402c09.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379611/normal_5ff1d72763b0e.pdfIn PDF document text
    • http://sberpodarok2020.online/best_tiktok_video_appc1dn5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382781/normal_5fcc5345b74a4.pdfIn PDF document text
    • https://gaturipagi.weebly.com/uploads/1/3/0/7/130739573/44f86.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447884/normal_5fcdcec5d4915.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/nawuvud/75084204708.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_off0000baeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBAEB 5532 bytes
SHA-256: ebb6e3d85b319a2ad7ae711831816ecb4274fef16d5ac76ee43802c6cc177d3c
font_01_sfnt_off0000cd98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD98 9868 bytes
SHA-256: 6be04ba7bcce3dd19604de9e71afb9991050c69decb46bf914b781a978b40f7f

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