Malicious PDF — malware analysis report

Static analysis result for SHA-256 1050a98d1e23267a…

MALICIOUS

PDF

83.2 KB Created: 2021-01-14 00:00:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 883618f39aea9f635d922b2672062676 SHA-1: 29e20ed5950075f265ffd9eaa051ef98cfcec4a7 SHA-256: 1050a98d1e23267a22d3d2b028b3704af6ce1560a27845e42e5fb1aae9bf4447
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains a large number of external links, many hosted on disposable domains, indicating a link farm or phishing operation. The embedded URLs suggest an attempt to redirect users to malicious sites, likely for credential harvesting or malware distribution.

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://trafffi.ru/123?utm_term=12+volt+fuel+transfer+pump+napa PDF link annotation
    • https://kubamugikogili.weebly.com/uploads/1/3/4/5/134508843/8009025.pdfIn PDF document text
    • https://bitifuzafaf.weebly.com/uploads/1/3/4/4/134488734/4245971.pdfIn PDF document text
    • https://site-1166042.mozfiles.com/files/1166042/sweet_empire_mod_apk_unlimited.pdfIn PDF document text
    • https://tofudilasikota.weebly.com/uploads/1/3/0/9/130969343/bidevujabop.pdfIn PDF document text
    • https://nofitipofawotuj.weebly.com/uploads/1/3/4/0/134012335/5469058.pdfIn PDF document text
    • https://site-1178814.mozfiles.com/files/1178814/janolakiboxoravitamakivu.pdfIn PDF document text
    • https://site-1177542.mozfiles.com/files/1177542/jisiwudajufiro.pdfIn PDF document text
    • https://tezexitebab.weebly.com/uploads/1/3/4/6/134600353/mixivipepawimu.pdfIn PDF document text
    • https://cdn.sqhk.co/texivewa/jehibfI/jajudonoxumojosiv.pdfIn PDF document text
    • https://site-1178570.mozfiles.com/files/1178570/government_funding_for_startup_business_in_south_africa.pdfIn PDF document text
    • https://cdn.sqhk.co/bulixanejad/hafiegc/36240776464.pdfIn PDF document text
    • https://jabuvevakeg.weebly.com/uploads/1/3/4/6/134685488/mogoxazus_ralulim.pdfIn PDF document text
    • https://rajexomogalifi.weebly.com/uploads/1/3/4/8/134891851/rutamudoxap_dawosogix_jowezevetoru_wixutemid.pdfIn PDF document text
    • https://site-1195739.mozfiles.com/files/1195739/netflix_party_ios_ipad.pdfIn PDF document text
    • https://cdn.sqhk.co/zivudasexoni/UPiwQPA/tivemevedupoginoj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off000109c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109C1 5196 bytes
SHA-256: be40dd1b880b7a4c8c559d555d61c79bbbee2b812bbe2e8f8878b6141bd34bfd
font_01_sfnt_off00011b62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B62 10672 bytes
SHA-256: bcad1e4158fae0a94f7d2a9c6faa3ce998b6f0504e498f3e4b7085458204f769

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