Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ef268ad0e6eb441…

MALICIOUS

PDF

67.4 KB Created: 2020-11-24 11:43:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 686fa85fe9c74b3508cfc97195c452d1 SHA-1: ea9688e38366bbbc9d447d93f2f92fb994cfdaaa SHA-256: 7ef268ad0e6eb4419181bb29edcf6f9002bb01437a50668542a7d18b17a2508f
174 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is a PDF containing embedded JavaScript, flagged by ML classifiers and ClamAV as malicious. Heuristics indicate it's a payment redirection lure, likely designed to trick users into clicking external links. The embedded JavaScript and numerous external URLs, including suspicious ones hosted on disposable domains, support the conclusion that this document is part of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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/strik?utm_term=carta+comercial+modelo PDF link annotation
    • https://papunagaku.weebly.com/uploads/1/3/1/3/131384156/9526788.pdfIn PDF document text
    • https://nulejekenafu.weebly.com/uploads/1/3/4/3/134367691/b8ab9ac96c4.pdfIn PDF document text
    • https://wosabizovores.weebly.com/uploads/1/3/4/5/134577485/divajo_ruxarumiziga.pdfIn PDF document text
    • https://tafuposavibado.weebly.com/uploads/1/3/4/0/134017079/vopemijifujebagude.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366632/normal_5fa2b8914f9a7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374976/normal_5f94ee07e447a.pdfIn PDF document text
    • https://naxedomabaxa.weebly.com/uploads/1/3/1/6/131606472/wexufuvaximis.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/bizamesuwepe/calendario_serie_a2_basket.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/431aa5c8-d07d-4afc-8e0a-23818e75b6c5/enchanting_fishing_rod_bdo.pdfIn PDF document text
    • https://s3.amazonaws.com/suxuzubojut/raman_abdullah_movie_hd.pdfIn PDF document text
    • https://s3.amazonaws.com/fokapikow/bahrain_bus_map.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_off0000ca92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA92 4812 bytes
SHA-256: bde588fe658cc03f7dfa7e7b7e6509922c3b472efa02865e84f7c407156e9a00
font_01_sfnt_off0000dad0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAD0 11736 bytes
SHA-256: e45271e6a0f0fb89679680738fe9aa8498abe161dea73c32df63c762e3cd0ae8

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