Malicious PDF — malware analysis report

Static analysis result for SHA-256 944f518e7f05c69e…

MALICIOUS

PDF

79.8 KB Created: 2021-03-02 11:49:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 85f64636a969904c4f62492c1557711e SHA-1: 96f719c7f6a0ff54b857a4c501e172b0c7f09861 SHA-256: 944f518e7f05c69e2dcb01e6023bf72982e4351626b6e8d15d70b856858e47e7
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://baarspo.ru/123?utm_term=how+does+brain+dominance+affect+color+perception PDF link annotation
    • https://cdn.sqhk.co/pasededi/hiLqib7/get_real_followers_for_instagram_real_likes_tagme.pdfIn PDF document text
    • https://gomamuna.weebly.com/uploads/1/3/5/3/135304292/1e6bd53898.pdfIn PDF document text
    • https://guxenebulofoto.weebly.com/uploads/1/3/2/8/132814975/8309899.pdfIn PDF document text
    • https://moliveje.weebly.com/uploads/1/3/5/3/135323163/1203478.pdfIn PDF document text
    • http://easycreditscore.info/1701125737yl0al.pdfIn PDF document text
    • http://voiprormul.xyz/majezijinipidurifabiri92jkh.pdfIn PDF document text
    • https://cdn.sqhk.co/zasokolof/rjeTMy0/zombies_2_werewolves_costumes_wyatt.pdfIn PDF document text
    • https://cdn.sqhk.co/lawafopugu/wMI7jjt/bingo_at_home_app_pattern.pdfIn PDF document text
    • http://dalkomis.website/rusitatobd61hu.pdfIn PDF document text
    • https://vaxinukosiju.weebly.com/uploads/1/3/4/6/134625250/9320437.pdfIn PDF document text
    • http://morpeoplelife.ru/39847502779uyj4x.pdfIn PDF document text
    • https://befejabenitegi.weebly.com/uploads/1/3/4/5/134530095/9466251.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/tunenijexe/bareilly_ki_barfi_movie_free_filmywap.pdfIn PDF document text
    • https://s3.amazonaws.com/wujafivabipo/musikif.pdfIn PDF document text
    • https://s3.amazonaws.com/sajezife/harry_potter_books_reddit.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e357.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE357 5492 bytes
SHA-256: 915999a241bc8c778692e8a3b99a03e2df00357092246c7816023a4bbb290204
font_01_sfnt_off0000f5fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5FA 11252 bytes
SHA-256: b319c215d0789cb2e65b3f21df3f4c0bb257601d6fe2fc8b29add4ded75c6782
font_02_sfnt_off00011c91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C91 16036 bytes
SHA-256: 35d3440dae1ebc896564e4e6f70ea95aa3a30a1ac603c7fffbb21b68b8b72e2f

Open this report in the interactive analyzer, or submit your own file for analysis.