Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b7b376881a1c237…

MALICIOUS

PDF

77.4 KB Created: 2021-01-05 03:43:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 6a2aa9d8179b104720201319b2ecbca0 SHA-1: eacbb083b68e3566d49161f4b99606caa1782d8f SHA-256: 8b7b376881a1c2379bdf364bd7388eee2591693fc686ea8ed9c9f365630af99b
156 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, flagging it as a phishing trojan. It contains a large number of external links, many pointing to PDFs, suggesting a link farm or SEO spam tactic to distribute malicious content. The primary URL, "https://trafffe.ru/123?utm_term=2011+forest+river+travel+trailer+owners+manual", is presented as a lure for a manual, but likely leads to a malicious payload. No scripts were extracted, but the PDF structure itself is used to host and distribute these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://trafffe.ru/123?utm_term=2011+forest+river+travel+trailer+owners+manual PDF link annotation
    • https://cdn.sqhk.co/lazujanaziri/LJxjggi/download_village_city_sim_2_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/ruxukulalodi/cjhJg7E/home_exterior_painting_cost_estimator.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418972/normal_5fb2fe457510c.pdfIn PDF document text
    • https://nakuzimatixibo.weebly.com/uploads/1/3/5/3/135388853/jekalibonojevuk-zuveposetar-vefubidonatezep.pdfIn PDF document text
    • https://cdn.sqhk.co/lixejudazeza/ahcjaii/53441518004.pdfIn PDF document text
    • https://saxibodusazo.weebly.com/uploads/1/3/0/7/130740440/jokerekokeb.pdfIn PDF document text
    • https://cdn.sqhk.co/jakufomego/1idjdic/21276858479.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422640/normal_5f9e1bfaea955.pdfIn PDF document text
    • https://cdn.sqhk.co/pavujakorige/bUhiJic/jungle_fruit_splash_a_match_3_games.pdfIn PDF document text
    • https://gusumadanu.weebly.com/uploads/1/3/2/6/132695601/2966987.pdfIn PDF document text
    • https://cdn.sqhk.co/bebubofawa/J6ibjhS/82738010855.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/dobesogum/3535185699.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6447bd57-f988-4cfe-826a-2cc6b49db0c9/sony_cdp-ce500_specs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab58b3b8-fa55-429b-b988-99e3cc998096/fleetwood_pop_up_camper_decals.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_off0000e43b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE43B 5176 bytes
SHA-256: ed1594b5f71487f3bf6a0eaf1a70ec33b2cc6d85abfa9698e9c9566b0c00aa57
font_01_sfnt_off0000f5c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5C5 10944 bytes
SHA-256: 7e2cb1e259ab5c90f03c3030e4baa71ea3759c3f8326ef4226268759b49662fa
font_02_sfnt_off00011a89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A89 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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