Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d7eea72e98118ce…

MALICIOUS

PDF

92.5 KB Created: 2021-02-13 09:30:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 7324e06294127893016011a929729d0b SHA-1: f43a329a46e4fb3fbbd49a66424699f9639ee071 SHA-256: 9d7eea72e98118cedc283eae25445a4e5bccddcc29aa7f247c69d34032ddfb31
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document exhibits characteristics of a phishing lure, using a seemingly innocuous topic ('Dps phone number in san antonio') to mask malicious intent. The high number of external links hosted on disposable domains, coupled with ML and ClamAV detections, strongly indicates malicious activity. Although no scripts were explicitly extracted, the PDF structure and heuristic firings suggest it may contain embedded JavaScript or exploit code designed to redirect users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://druttle.ru/123?utm_term=dps+phone+number+in+san+antonio PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4488558/normal_60046d51cc5cc.pdfIn PDF document text
    • https://buxomajuse.weebly.com/uploads/1/3/4/5/134588570/2019412.pdfIn PDF document text
    • http://wuzubofetaxoger.iblogger.org/73429040326.pdfIn PDF document text
    • http://rating-bookmaker.ru/interesting_boy_names_starting_with_kgbh0u.pdfIn PDF document text
    • http://healthit.space/a_pinch_of_salt_poem_answersacnqb.pdfIn PDF document text
    • http://koteyarn.moscow/33611409592bx2a6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383680/normal_5fcd3904a3c54.pdfIn PDF document text
    • https://guxilidokuwog.weebly.com/uploads/1/3/0/7/130738661/gixunasoti-fumoxaru.pdfIn PDF document text
    • https://malolikekex.weebly.com/uploads/1/3/4/7/134718462/jakuzejifirolob.pdfIn PDF document text
    • http://zdorovie-vashe-vse.xyz/69259064401sd154.pdfIn PDF document text
    • https://piwutevuxave.weebly.com/uploads/1/3/4/8/134891910/pitusokejiwame-barofikez.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419430/normal_5feb7b042e11c.pdfIn PDF document text
    • https://biteledazuxol.weebly.com/uploads/1/3/4/3/134315761/f946d815b6c89.pdfIn PDF document text
    • https://faxomozux.weebly.com/uploads/1/3/0/7/130775398/2978080.pdfIn PDF document text
    • https://kaposabebozof.weebly.com/uploads/1/3/4/4/134466843/8623746.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486987/normal_6025945c17d41.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/jeworurowam/long_vs_short_vowel_sounds_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/jajuzasalikirut/metezutexunojebesimubudiz.pdfIn PDF document text
    • http://nawexox.epizy.com/sql_database_administrator_resume.pdfIn PDF document text
    • http://vezuzatutuxi.epizy.com/africa_video_music.pdfIn PDF document text
    • http://varunogozanog.rf.gd/loch_lomond_walking_guide.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_off00012a89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A89 5164 bytes
SHA-256: 5203f05fbe0abeec3a35b991e43838c3b9dc1539830fdc10cb89fdfd9594b625
font_01_sfnt_off00013be7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13BE7 12272 bytes
SHA-256: 18516967cbc7ce1504063ab7c5a3e94d7531bc3eed9e0ab851d4b3d5125e0857

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