Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6447d91e88bffd9…

MALICIOUS

PDF

74.2 KB Created: 2021-04-03 12:25:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 8e3ffb34e3cf6f6ce68dbe3e24dfafaf SHA-1: 12587d5a86f9f63a12bcc4ef431e6c177602138c SHA-256: e6447d91e88bffd90b03899ef16700177daea42feb0ac9db6355719467f36215
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a link farm. It contains numerous external URIs pointing to various domains, many of which are associated with disposable hosting or are otherwise suspicious. The primary purpose appears to be directing users to potentially malicious or scam-related content hosted externally.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://xezojetit.ru/wix?keyword=ace+fitness+study+guide PDF link annotation
    • https://webakutukulufu.weebly.com/uploads/1/3/2/6/132683024/06a1e9e6e.pdfIn PDF document text
    • http://changepass.online/ukulele_strumming_patterns_4_4d4fg6.pdfIn PDF document text
    • http://helpforteam.com/how_to_repair_tv_remote_buttonsidenb.pdfIn PDF document text
    • http://winsbig.space/kolay_ngilizce_gramer_kitab_c3um81.pdfIn PDF document text
    • http://nosinoski.shop/sofewumezagadelipijugs08g.pdfIn PDF document text
    • https://fadabavawabup.weebly.com/uploads/1/3/4/0/134095990/lanari-dopebevera-kizigokopinuno.pdfIn PDF document text
    • http://item-mask.top/coleman_generators_4000_wattsputyl.pdfIn PDF document text
    • http://temagezo.iblogger.org/hamlet_freezer_film.pdfIn PDF document text
    • https://fudiditinip.weebly.com/uploads/1/3/1/4/131453724/6343171.pdfIn PDF document text
    • https://karegito.weebly.com/uploads/1/3/4/6/134626514/613962b7cb9.pdfIn PDF document text
    • http://tiktokfrance.fun/tumewudaxuwuv9kit9.pdfIn PDF document text
    • https://xezinaruwi.weebly.com/uploads/1/3/4/4/134479948/lepepufuwuto_mubaniz.pdfIn PDF document text
    • http://gloslides.com/msi_z97_gaming_5_cpu_compatibilityswspg.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://46a1ac71-481d-4a85-b709-d40f3a189542.filesusr.com/ugd/143c98_6d31c307d1404d5da71e495a8024a668.pdf?index=trueIn PDF document text
    • http://fisumude.rf.gd/nador.pdfIn PDF document text
    • https://f635e5d9-31b1-4f19-b758-7a623be10181.filesusr.com/ugd/6cf0f5_84c2d339911f44d5a4b537ef4c387128.pdf?index=trueIn PDF document text
    • https://89d9876f-4e47-4433-ab5b-8da47ae3ae5c.filesusr.com/ugd/37c326_fd4dd3cb619146a4ae57e3410efaacb6.pdf?index=trueIn PDF document text
    • https://f8d82b49-d438-4da2-b906-f876cb6fe635.filesusr.com/ugd/12dc78_471093fc3b6b40159025439aea439455.pdf?index=trueIn PDF document text
    • https://147762ec-90f0-4523-8579-43cb3cd17c82.filesusr.com/ugd/6c48b9_91f7b048f6174b84ae0b3908512068f7.pdf?index=trueIn PDF document text
    • http://vokunewegulu.epizy.com/gajeridebadesogona.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_off0000e3e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3E5 4944 bytes
SHA-256: 17907dfeb73d7de8b057abe5d930172496bf45bf11c14d12f1aa0bd1d4d73746
font_01_sfnt_off0000f4e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4E2 11528 bytes
SHA-256: 5c9b25aabe5239244f89babd89d7b7ae88fe0c52b8b4e888deb9a170d9fdce9c

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