Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a76f5684dc197ee…

MALICIOUS

PDF

70.3 KB Created: 2021-01-16 07:50:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: a2b2cd82ef5db819f5687973c040d98c SHA-1: 1574026e7380318b40b21e3aa2851313147f6882 SHA-256: 7a76f5684dc197ee99d31d622c4646f162ae09f0faa424610217ad41b6128b45
186 Risk Score

Malware Insights

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

This PDF file is identified as malicious by ML classifiers and ClamAV, indicating it's a phishing or trojan distribution attempt. It contains a large number of external links, suggesting it functions as a link farm to direct users to potentially malicious websites. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, and the presence of numerous external links points towards a tactic of SEO manipulation or traffic redirection.

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://traffset.ru/wb?keyword=cute%20snake%20coloring%20page PDF link annotation
    • https://vejazejama.weebly.com/uploads/1/3/1/3/131381369/695332433f5c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489733/normal_5fc030914fd52.pdfIn PDF document text
    • https://ranutejojem.weebly.com/uploads/1/3/5/3/135314135/jelapo.pdfIn PDF document text
    • https://cdn.sqhk.co/vefapatape/qgidBjZ/spirit_saga_eggplant_escapade_apk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446394/normal_5fd059ad29729.pdfIn PDF document text
    • https://cdn.sqhk.co/tuseliwi/WieTvyI/raspberry_pi_zero_pinout_tv.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455881/normal_5ffbb46a276c9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416810/normal_5f95880bc05c3.pdfIn PDF document text
    • https://gilinolejokakis.weebly.com/uploads/1/3/4/6/134632374/kerav.pdfIn PDF document text
    • https://fulipevaxavu.weebly.com/uploads/1/3/2/6/132695351/e4e04ccb83ff3.pdfIn PDF document text
    • https://fosakozetabu.weebly.com/uploads/1/3/1/4/131483491/a3bd9bb27f.pdfIn PDF document text
    • https://vatelepetelijul.weebly.com/uploads/1/3/4/7/134765631/bonirujufatu-sanap-nufazukikolokiw-sogozim.pdfIn PDF document text
    • https://cdn.sqhk.co/vefapatape/hdihfjh/40895213770.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386829/normal_5f95d9c67a994.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/wixanarer/36309467437.pdfIn PDF document text
    • https://s3.amazonaws.com/setikizo/ansys_maxwell_free_crack.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_off0000d724.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD724 5068 bytes
SHA-256: 3a00721bf7e70aeb9b7b554561a3f4c1fa3e45f9b284245efa15001b9ac49d71
font_01_sfnt_off0000e873.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE873 10400 bytes
SHA-256: 1e1c7abb722fe8118176189ab4bb4e4cea8ac2fa0fad3800baf3adbff62cb844

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