Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a7e409d3626fa71…

MALICIOUS

PDF

67.4 KB Created: 2021-06-02 22:27:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 5be887fc04e5adae53438da572d35122 SHA-1: d37da37fac2f2063b049d54d5552eff59b97ad7c SHA-256: 8a7e409d3626fa711b4c3dbac359b6f2aea027fdcd7ca7ef6f8dd236139971c1
186 Risk Score

Malware Insights

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

The PDF document contains numerous external links, many of which are hosted on disposable domains, suggesting a link farm designed to direct users to potentially malicious websites. The document body, though heavily obfuscated, contains text related to 'how to reset your voicemail password verizon', indicating a phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://pixomot.ru/pbw?utm_term=how+to+reset+your+voicemail+password+verizon PDF link annotation
    • https://viledilexemapol.weebly.com/uploads/1/3/4/6/134698440/7821815.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487191/normal_5fd9225313269.pdfIn PDF document text
    • https://tekujutiwud.weebly.com/uploads/1/3/4/2/134234893/8339675.pdfIn PDF document text
    • https://fobedixosofano.weebly.com/uploads/1/3/4/3/134377241/jedekox.pdfIn PDF document text
    • https://worikasef.weebly.com/uploads/1/3/5/9/135966717/somunaw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494417/normal_602d7c8f34b9a.pdfIn PDF document text
    • https://gixifufu.weebly.com/uploads/1/3/3/9/133999878/a820c3464be264c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480155/normal_5ffaca0442b98.pdfIn PDF document text
    • https://zojujevekuki.weebly.com/uploads/1/3/0/9/130969212/vezari.pdfIn PDF document text
    • https://wavafawiwex.weebly.com/uploads/1/3/2/8/132815000/rakovanejilire.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4401518/normal_5ffeff0992770.pdfIn PDF document text
    • https://laboxowoxom.weebly.com/uploads/1/3/5/4/135400847/573900.pdfIn PDF document text
    • https://jirakevajiw.weebly.com/uploads/1/3/5/9/135966085/kubap.pdfIn PDF document text
    • https://koxiguxizabi.weebly.com/uploads/1/3/1/1/131163763/wifadokasemetotem.pdfIn PDF document text
    • https://vubozunede.weebly.com/uploads/1/3/4/6/134685471/a20b4.pdfIn PDF document text
    • https://bewotababuruga.weebly.com/uploads/1/3/1/1/131163836/pawurutizafidibirik.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370304/normal_5fe7e26a80d01.pdfIn PDF document text
    • https://lorolefe.weebly.com/uploads/1/3/1/8/131871725/lozekuxuwof.pdfIn PDF document text
    • https://dogaralezuj.weebly.com/uploads/1/3/1/6/131637140/471869.pdfIn PDF document text
    • https://fojaxusulilunud.weebly.com/uploads/1/3/1/3/131381134/670b73b9f3221.pdfIn PDF document text
    • https://lewixukulir.weebly.com/uploads/1/3/1/6/131606807/wokopi.pdfIn PDF document text
    • https://zobupevebidibet.weebly.com/uploads/1/3/3/9/133997179/punowi-gojawemozoxuw-zowebigisopo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000cace.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCACE 5484 bytes
SHA-256: 9c2e1f8ac3a5194700cd535d8e635344ca67132c616a1d7930a05b3c35989fe9
font_01_sfnt_off0000dd7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD7D 10084 bytes
SHA-256: 40dcb4974f174dee3969707ecb13fcfd760f66bdc37a03f9949172fcf44780a4