Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c421ce2344fac73…

MALICIOUS

PDF

80.9 KB Created: 2020-12-16 13:52:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: d18f79487e490c2469ee6d67fb36e1a7 SHA-1: e5d4223c341e1575356808deb885418e13059d5a SHA-256: 0c421ce2344fac7336d1cd88ada870ea6ebdd035f46bfb3a941ae712ac238876
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file, identified as malicious by ML classifiers and ClamAV, contains a large number of external links, a technique often used for SEO farms or phishing campaigns. One prominent URL, 'https://trafffi.ru/aws?utm_term=greenland+group+china+annual+report', is embedded within the document's content, suggesting a potential phishing or malicious redirection attempt. The presence of numerous PDF links, including one to 'https://s3.amazonaws.com/xifabilejilab/map_with_symbols_and_key.pdf', indicates a link farm strategy.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://trafffi.ru/aws?utm_term=greenland+group+china+annual+report PDF link annotation
    • https://munejubulogulep.weebly.com/uploads/1/3/4/2/134266186/9724240.pdfIn PDF document text
    • https://kapebuzuzevasa.weebly.com/uploads/1/3/4/5/134587117/mufapa.pdfIn PDF document text
    • https://vasigigu.weebly.com/uploads/1/3/4/6/134607878/ruwagisotu-vewosudizenijis-fasig.pdfIn PDF document text
    • https://tovozilulu.weebly.com/uploads/1/3/0/8/130873983/f4f9f865deebe8.pdfIn PDF document text
    • https://vorevowupi.weebly.com/uploads/1/3/4/6/134633589/wozijexokowufinin.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/xifabilejilab/map_with_symbols_and_key.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fce08b1bb7ea8683c95c538/t/5fd1b32b133bcb3b889c702d/1607578411716/35_ty_draw_road_cardiff.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9be590a7-9c9d-4421-8c86-40ebddacb313/minecraft_witchcraft_mod.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe0871f8cdb769c6aa423e/1606289522654/81613734592.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc580283398ff75154cf52d/t/5fd685467fc52c206929f32b/1607894343410/44508860513.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5baadf7cf8c75404bcdf6/t/5fd613e73ebe04163156a1f1/1607865321126/pdf_to_dwg_converter_offline.pdfIn PDF document text
    • https://s3.amazonaws.com/suxuzubojut/41238889545.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc1d2da12facd59ceb37db7/t/5fc5413d3485235c8672895d/1606762814325/cod_mobile_hacks_no_human_verification.pdfIn PDF document text
    • https://s3.amazonaws.com/mozirolinitaje/zebosanolura.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d32a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD32A 13684 bytes
SHA-256: 92f26af37fc3d47912b10b1966379ebb0eca63195eeccbac6c679d955f93f739
font_01_sfnt_off0000ff25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF25 5188 bytes
SHA-256: 989bb367ed04fd890c58df0d96b4d628471cb99db2d879b1472e0941a6b0c745
font_02_sfnt_off000110c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110C3 11028 bytes
SHA-256: 0b51e4297f95ccf74033d2e1be1551420c44efbe7541b93a67a76e684686ba6b

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