Malicious PDF — malware analysis report

Static analysis result for SHA-256 2dd2d07f4c4716d3…

MALICIOUS

PDF

73.9 KB Created: 2021-03-19 20:02:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 6aff381d08459453d873c9472828f831 SHA-1: 0a8fdba68952e7e27f765e150b351f8fd8416853 SHA-256: 2dd2d07f4c4716d3905e0dde034beda9c5c47073a9540d639e7b89891c887e1f
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which are disguised as search results for specific book titles. This technique is commonly used to create link farms for SEO manipulation or to direct users to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution.

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 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://jacksth.ru/wix?keyword=fundamentals+of+musculoskeletal+imaging+mckinnis+pdf PDF link annotation
    • http://wwwbcpzonasegura-viabcp.com/jeripapana48pu5.pdfIn PDF document text
    • http://zoguponuwuxoli.medianewsonline.com/81832697184.pdfIn PDF document text
    • http://gazizelasama.getenjoyment.net/60272744019.pdfIn PDF document text
    • http://volalagokiva.sportsontheweb.net/strength_training_anatomy_2nd_edition_free_download.pdfIn PDF document text
    • https://jimivisimobud.weebly.com/uploads/1/3/4/9/134901817/3604493.pdfIn PDF document text
    • https://cdn.sqhk.co/kasuwune/zidFjbH/pudabaduwitiroxetemekezo.pdfIn PDF document text
    • https://cdn.sqhk.co/zerumowo/hixhfQ9/dazerufeduvuw.pdfIn PDF document text
    • http://100p-f.ru/gre_test_scores_percentilespt9nj.pdfIn PDF document text
    • https://vubufogos.weebly.com/uploads/1/3/4/7/134766152/fetabamegebu.pdfIn PDF document text
    • http://girlsbeach.space/81556535719zy7px.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lonesopuw.onlinewebshop.net/what_tech_stocks_are_down_today.pdfIn PDF document text
    • https://s3.amazonaws.com/sowewazulejewi/27160220631.pdfIn PDF document text
    • https://s3.amazonaws.com/zidosozawok/xitibafejabagovapo.pdfIn PDF document text
    • https://s3.amazonaws.com/vososasoxumete/barbri_conviser_mini_review_mpre.pdfIn PDF document text
    • https://s3.amazonaws.com/tufitijinexu/ejemplo_de_contrato_de_arrendamiento_de_parcela_ejidal.pdfIn PDF document text
    • https://s3.amazonaws.com/jijari/anaganaga_o_dheerudu_full_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/vavapekadoliti/dark_souls_2_how_to_do_jump_attack.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_off0000e393.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE393 5400 bytes
SHA-256: c5072617c83df74ca5cab3bf518a5bcd85c64a5fe593478e29be1076d3f5d63c
font_01_sfnt_off0000f5ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5ED 10528 bytes
SHA-256: 6cd45d11fc993c172ac3963da0a840b83869b7eaea6464b1aa3b9bc4e8cfab19

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