Malicious PDF — malware analysis report

Static analysis result for SHA-256 d11e49addc770651…

MALICIOUS

PDF

82.2 KB Created: 2021-03-25 05:30:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: dacc3173046c17afb73188ad998d0c67 SHA-1: 7e14ad264739d1cd71e8921f03792ece450fa98f SHA-256: d11e49addc77065104ec1c3e58bd470801e9aa662fb3cdb02c543bd89071b25e
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, identified as a link farm, and is flagged by ML classifiers and ClamAV as malicious. The document body, though heavily obfuscated, suggests a lure related to a 'Dometic ct thermostat manual'. The presence of embedded URLs and the heuristic 'PDF_SEO_LINK_FARM' indicate a strong intent to redirect users to potentially malicious sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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.
  • 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://fokemale.ru/wix?keyword=dometic+ct+thermostat+manual PDF link annotation
    • https://tazifidaron.weebly.com/uploads/1/3/4/9/134901468/kozinuturo-karixofixege-tizujuroju-jegefunanunoviz.pdfIn PDF document text
    • https://cdn.sqhk.co/soxuvezosapa/fgdihQA/xudemobimiwajolulunepilu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412164/normal_602b486671cdf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492240/normal_6038799c43c5f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414701/normal_600d936ec9999.pdfIn PDF document text
    • https://cdn.sqhk.co/pabelemusib/hbji582/michigan_abortion_consent_form.pdfIn PDF document text
    • https://cdn.sqhk.co/torazanopuni/9hdWfic/nipibekugawolomutasubebib.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488137/normal_60113996f0ea6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382621/normal_6011371a1c4e1.pdfIn PDF document text
    • https://cdn.sqhk.co/gepumenujeme/difiiaS/racing_fever_game_download_app.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459028/normal_5fe5c7a979307.pdfIn PDF document text
    • https://cdn.sqhk.co/wakivugex/xijjcUx/68781502926.pdfIn PDF document text
    • https://cdn.sqhk.co/jemitaso/ilVibgf/evacuation_zone_map_santa_cruz_county.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491436/normal_5ffccf76198d0.pdfIn PDF document text
    • https://cdn.sqhk.co/zogameva/iaPBgY2/golden_spike_salt_lake_city.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492259/normal_6041d5969d176.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485301/normal_605bf6e489a53.pdfIn PDF document text
    • https://cdn.sqhk.co/jaxabofapuw/kjbjdEr/2384821536.pdfIn PDF document text
    • https://cdn.sqhk.co/noloxunipe/hjhihts/wuluxugulelodigewikekegas.pdfIn PDF document text
    • https://zunutupere.weebly.com/uploads/1/3/1/4/131453944/tikosonuperer.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_off00010554.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10554 5036 bytes
SHA-256: 01ca198dc4edd431677fee314d3dfb8f38a6abf46a9b411621dedf28daddbb24
font_01_sfnt_off00011648.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11648 11036 bytes
SHA-256: 038d4e736aac22b1ef69a33f06ccab0fed5a7d21fbd92719d6819a19b57ff84d

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