Malicious PDF — malware analysis report

Static analysis result for SHA-256 6eb38791b06bf97f…

MALICIOUS

PDF

73.0 KB Created: 2021-05-01 23:44:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: f877553af2b0bdc92d180f2e348d7c78 SHA-1: 2d227653762cdfc79bc8135e3074856fc215692c SHA-256: 6eb38791b06bf97f9745101eaa56db4ab691bb42ae6b010e424dc298129d2dec
156 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. The heuristic 'PDF_SEO_LINK_FARM' suggests the document contains a large number of external links, likely to facilitate phishing or malware distribution. One of the embedded URLs, 'https://jumiwimov.ru/strik?utm_term=maid+rpg+review', is a primary indicator of compromise.

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 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.
  • 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://jumiwimov.ru/strik?utm_term=maid+rpg+review PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4411686/normal_60462c583f7ea.pdfIn PDF document text
    • http://gezetola.scienceontheweb.net/como_funciona_la_energia_eolica.pdfIn PDF document text
    • https://pesawuzopedeg.weebly.com/uploads/1/3/5/3/135327269/83ce85bd4972af9.pdfIn PDF document text
    • http://fevinoreniwelik.sportsontheweb.net/2001_subaru_outback_engine_oil.pdfIn PDF document text
    • http://biwedujurar.mywebcommunity.org/les_miserables_2019_summary.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480142/normal_605683d9eff39.pdfIn PDF document text
    • https://bamususifilozok.weebly.com/uploads/1/3/1/3/131383301/c5c125a515.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4503197/normal_5fde9db5cb167.pdfIn PDF document text
    • https://sipebiwamedewor.weebly.com/uploads/1/3/4/7/134707389/0fd049fbaae5aef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406213/normal_600cf1296b2cb.pdfIn PDF document text
    • https://zaluzukefajol.weebly.com/uploads/1/3/5/4/135400247/264f7bc3e42466a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://30de3caf-c510-4ce9-8691-b8280dc60d9b.filesusr.com/ugd/4980ee_9b3a408a52c74fbdada4109579cb5cc3.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/julexekubaj/fokenowepewapovurokuxosa.pdfIn PDF document text
    • https://s3.amazonaws.com/wixatax/74607184480.pdfIn PDF document text
    • https://s3.amazonaws.com/mejifavo/lomireboxizexi.pdfIn PDF document text
    • https://51364a6b-283d-4537-b9df-48522fd8faf2.filesusr.com/ugd/921180_e56aa05c8f1044eda96f33094f14b51c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/genijusemu/bazz_song_by_jinda_dhillon.pdfIn PDF document text
    • https://s3.amazonaws.com/pajeriramal/35178313597.pdfIn PDF document text
    • https://s3.amazonaws.com/wuvepilamamuse/60480425385.pdfIn PDF document text
    • https://s3.amazonaws.com/pasawexawinogad/british_comedy_guide_quiz.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_off0000e051.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE051 5072 bytes
SHA-256: ae97b6bc3552f446dddd7ea96f2b4348c49a25e1fbe1ce6c4b64ff2cd5fd6a51
font_01_sfnt_off0000f1c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1C5 10972 bytes
SHA-256: 26389e27c64620d45abf6268592a7fd29f4cb8db076a122aa339b52735edf214

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