Malicious PDF — malware analysis report

Static analysis result for SHA-256 22501ce3c7302b3b…

MALICIOUS

PDF

76.2 KB Created: 2021-02-24 00:09:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: d348b7be5cc161f6d4e818dca56704d2 SHA-1: cd72256376f7ec04881be130c96936866acc8ac3 SHA-256: 22501ce3c7302b3bc6d51602edc939f24bb82fc85f0012520678f1b2381f01e8
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, with a critical heuristic firing for a 'PDF_SEO_LINK_FARM'. The primary external URL points to 'seumenha.ru', which is likely part of a phishing or SEO manipulation scheme. While no scripts were directly extracted, the PDF structure and numerous external links suggest an attempt to redirect users to malicious or deceptive content, potentially for phishing or to host further malware.

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 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://seumenha.ru/strik?utm_term=how+to+explain+feelings+to+therapist PDF link annotation
    • https://cdn.sqhk.co/loziromegon/dgefM0p/rewebama.pdfIn PDF document text
    • https://mesasijodise.weebly.com/uploads/1/3/5/3/135315214/ponaruku.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388819/normal_600e85d763069.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384039/normal_60149eb8b147b.pdfIn PDF document text
    • https://cdn.sqhk.co/tebefaravuz/icihCxw/zanopefoz.pdfIn PDF document text
    • https://cdn.sqhk.co/gavezexu/1gdxZKu/hardest_game_in_the_world_level_30.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/wukara/video_er_professional_for_edge.pdfIn PDF document text
    • https://s3.amazonaws.com/goviwigax/babapilet.pdfIn PDF document text
    • https://s3.amazonaws.com/xuzed/palanined.pdfIn PDF document text
    • https://s3.amazonaws.com/ruzumeb/gegar.pdfIn PDF document text
    • https://s3.amazonaws.com/gekojulog/derarus.pdfIn PDF document text
    • https://s3.amazonaws.com/napejaxosinages/kagejasuxiriwokabi.pdfIn PDF document text
    • https://s3.amazonaws.com/nufidibodudulad/plural_vs_possessive_nouns_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/fikuvine/dunkin_donuts_glazed_munchkin_calories.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d3ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3EA 3488 bytes
SHA-256: 0f602b020dc6dd63dc04ecd53ded7895b4598fad879ad71162346df75fc4e60e
font_01_sfnt_off0000e073.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE073 5072 bytes
SHA-256: 056374e178cf2cebe01b21c18ac24a0c3eed4c60a73588870aa3696196cf6c48
font_02_sfnt_off0000f1bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1BD 10264 bytes
SHA-256: 2c2863efcb970ae56ce3363a3ba3b1e4ac55f58753aae9b2b5c56ff40befe274
font_03_sfnt_off000114fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114FE 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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