Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e83ed13c08ddfd5…

MALICIOUS

PDF

78.4 KB Created: 2021-02-18 17:55:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 201b8769397858178ce9e56a8dbba78c SHA-1: 2198ea2744d4c9f0945083eba8322cd0d743c1e0 SHA-256: 5e83ed13c08ddfd56081bf93150541a053140bcf22fb64324aa7f7644650283c
226 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, indicative of a link farm or SEO poisoning attack. The document body text, while seemingly innocuous, is likely a lure to encourage clicks on these malicious links. The presence of phone numbers suggests a potential scam or phishing attempt. The ML classifier and ClamAV detection strongly indicate malicious intent.

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
  • 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.
  • Travel-support phone-number stuffing scam high SE_TRAVEL_SUPPORT_PHONE_SCAM
    Document repeats phone numbers in airline/travel/refund/support language, often across multiple regional phrasings. This matches SEO/support-scam PDFs that impersonate airlines or travel brands and route users to attacker-controlled call centers rather than a normal travel document.
  • 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://baarspo.ru/wix?keyword=r+for+everyone+pdf+drive PDF link annotation
    • https://cdn.sqhk.co/sigidezok/bheUJia/40669640696.pdfIn PDF document text
    • https://s3.amazonaws.com/resisuna/homebrew_nintendo_wii_guide.pdfIn PDF document text
    • http://9gusevshop.space/learning_basic_arabic_languagepsxlu.pdfIn PDF document text
    • https://zanasebumafuwaj.weebly.com/uploads/1/3/4/8/134899829/winajewisi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413113/normal_601d737d0dbb6.pdfIn PDF document text
    • https://cdn.sqhk.co/desogepupema/ghcJjfR/12075126281.pdfIn PDF document text
    • https://cdn.sqhk.co/nilesatu/ZtCtThc/dovet.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463002/normal_6028ed05196bc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496577/normal_5ff0204f652d2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455673/normal_600766d8b515e.pdfIn PDF document text
    • https://cdn.sqhk.co/zegofurop/Pggyhge/domiz.pdfIn PDF document text
    • https://s3.amazonaws.com/fulazelof/bupezurefomuvamotinaxovuk.pdfIn PDF document text
    • http://wei-nmvc.com/kebixog2efy.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473638/normal_5fd344bc9992d.pdfIn PDF document text
    • https://cdn.sqhk.co/wobuwozavenu/ikjjYji/92644319333.pdfIn PDF document text
    • https://s3.amazonaws.com/wotodedaruzuk/best_cross_platform_games_2018.pdfIn PDF document text
    • http://donbetosstreettacos.com/like_mike_pelicula_completa_en_espaol_latino_gratisenl8f.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off0000f6c8.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off0000f6c8.bin)
    • 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 extracted file (font_00_sfnt_off0000f6c8.bin)

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f6c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6C8 4784 bytes
SHA-256: c86ecc1c97cfd692519321fc427aff4ba997295129c180b92acb54da2ace9e0e
font_01_sfnt_off00010734.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10734 10964 bytes
SHA-256: 562fbe8d7512de77caad34470ae731f7958d5cd212958efb97646b12b4d108cc

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