Malicious PDF — malware analysis report

Static analysis result for SHA-256 e34f55c74fc96604…

MALICIOUS

PDF

71.9 KB Created: 2021-01-15 00:16:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 7fe340e144c9a76676503bb37a28d4ad SHA-1: e3177894323b5305bcdc970a6bfd04db14a930d8 SHA-256: e34f55c74fc966044e6377782082dd9c686321edb916fa6750d1e045e61f1e68
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It contains numerous external URIs, with one specifically pointing to 'trafffe.ru', suggesting it's part of a phishing or malware distribution campaign. The document body, though heavily obfuscated, contains text related to a 'laboratory safety audit report sample', likely a lure to entice users to click on the embedded malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://trafffe.ru/aws?utm_term=laboratory+safety+audit+report+sample PDF link annotation
    • https://site-1176684.mozfiles.com/files/1176684/65806608613.pdfIn PDF document text
    • https://site-1192597.mozfiles.com/files/1192597/paypal_customer_service_hours.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365620/normal_5fada2a057444.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412780/normal_5ff4d90045a55.pdfIn PDF document text
    • https://site-1190639.mozfiles.com/files/1190639/1086513460.pdfIn PDF document text
    • https://liwojugimigazip.weebly.com/uploads/1/3/4/9/134904469/kujiwunazokevowo.pdfIn PDF document text
    • https://site-1246156.mozfiles.com/files/1246156/bawobesoxiloxekixulunerus.pdfIn PDF document text
    • https://xawalovu.weebly.com/uploads/1/3/4/6/134652108/liwubov-tadotufugubure-metunamobuf.pdfIn PDF document text
    • https://site-1174103.mozfiles.com/files/1174103/heart_applique_pattern_free.pdfIn PDF document text
    • https://site-1178570.mozfiles.com/files/1178570/corporate_strategy_definition_in_management.pdfIn PDF document text
    • https://site-1178112.mozfiles.com/files/1178112/5961434460.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501041/normal_5fbf5cb2f2e01.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000dd16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD16 5372 bytes
SHA-256: 972a134d31bbdcfa02bd2518042c1f2b087018bce85d11cdc80b6f5c2ad78b34
font_01_sfnt_off0000ef4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF4A 10396 bytes
SHA-256: a2969b1cc02132e91e9812a7d64fe1e5293e0ea76e1f6114d111dfc3aa936546

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