Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f66f065b694dc71…

MALICIOUS

PDF

163.6 KB Created: 2021-02-18 14:13:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 7742edbaa4816963ae8f0cf41ebd2035 SHA-1: 2e9b06f451be3b3ece0bddd74141e88bd9b95de5 SHA-256: 2f66f065b694dc713fb04530ad50e04576f287a27f22aedeab0e66b7d1d38e10
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, with 'seumenha.ru' and 'rimelutafoterir.iblogger.org' being prominent examples that likely lead to malicious content or further infection stages. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the overall structure and heuristic firings strongly suggest a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://seumenha.ru/wix?keyword=young+justice+rocket+husband PDF link annotation
    • http://rimelutafoterir.iblogger.org/dobubefamunelenanivaxulux.pdfIn PDF document text
    • https://towelekuw.weebly.com/uploads/1/3/1/4/131406253/8106451.pdfIn PDF document text
    • https://miwunukeje.weebly.com/uploads/1/3/4/5/134524605/45c43.pdfIn PDF document text
    • https://petuxomurekag.weebly.com/uploads/1/3/0/8/130874153/3493592.pdfIn PDF document text
    • https://rimuzomidaz.weebly.com/uploads/1/3/4/3/134353295/0f1ef561c0642e.pdfIn PDF document text
    • https://pejupatuwotim.weebly.com/uploads/1/3/2/8/132814375/wosomenu_talamolom_zerabiwag.pdfIn PDF document text
    • https://powufekati.weebly.com/uploads/1/3/4/0/134012492/8d7fbb.pdfIn PDF document text
    • https://luvodufugatese.weebly.com/uploads/1/3/4/8/134893210/garipurozefeniro.pdfIn PDF document text
    • https://serarabasujuz.weebly.com/uploads/1/3/1/6/131606617/dutetoxuvomapom.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://beduxuluwuniva.rf.gd/vafibapo.pdfIn PDF document text
    • http://lolofekigosot.epizy.com/cooking_academy_2_pc_free.pdfIn PDF document text
    • http://nimokum.rf.gd/mla_citation_guide.pdfIn PDF document text
    • http://vekemifapujev.rf.gd/realidades_2_3a-_8_crossword_answers.pdfIn PDF document text
    • http://vimitafukufes.rf.gd/63072817245.pdfIn PDF document text
    • https://s3.amazonaws.com/firigugixujotov/animal_donkey_sound.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_off000249e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x249E1 5412 bytes
SHA-256: 4d9844b9fdbee7cef58627697e3bc7a5992eea6ec2308b98028665abae8bde32
font_01_sfnt_off00025c4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x25C4D 10860 bytes
SHA-256: 98825acf6733cc35ea81696a205db73ee6d57580364beb3606bf22dbb093db70

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