Malicious PDF — malware analysis report

Static analysis result for SHA-256 695ee4bf8a815c64…

MALICIOUS

PDF

74.9 KB Created: 2021-02-24 10:36:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 0b0e24f9410c434ffdcd8be00b92d0ad SHA-1: 8776aab4f07f3eeccfae18ee801b6faf39b9438c SHA-256: 695ee4bf8a815c643653fff58e7afab65207190c0b7b49d003d0449fac03e3ba
126 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external URIs, many pointing to disposable domains, suggesting a link farm or phishing lure. The presence of PDF-specific heuristics like 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports this, indicating the document is designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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 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://jottigo.ru/123?utm_term=bosch+router+table+setup PDF link annotation
    • http://bokifov.iblogger.org/jamopelowuvoparuxiraku.pdfIn PDF document text
    • http://smilex.club/live_tv_channels_online_free_apkgfdrt.pdfIn PDF document text
    • http://jumpfs.space/41088183280fv4ru.pdfIn PDF document text
    • https://xebolefijepipol.weebly.com/uploads/1/3/0/7/130739937/757772f4c68f402.pdfIn PDF document text
    • https://topuzuxet.weebly.com/uploads/1/3/0/7/130739133/2710914.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378831/normal_5ff45b89c6da6.pdfIn PDF document text
    • https://naxulukituno.weebly.com/uploads/1/3/4/8/134879135/sovovunose.pdfIn PDF document text
    • http://kekebum.22web.org/credit_note_approval_format.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370284/normal_5fe982a50d3f0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449615/normal_5fd3cf8494f2e.pdfIn PDF document text
    • https://pajotesose.weebly.com/uploads/1/3/2/6/132681045/nexisoriw_wupunogugataf_jinew.pdfIn PDF document text
    • https://gekojivigi.weebly.com/uploads/1/3/1/0/131070255/minelivakijuga.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415334/normal_5fce0cd9a974a.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/wovisak/apk_blibli_versi_lama.pdfIn PDF document text
    • https://s3.amazonaws.com/jifedefujodu/firebase_access_token_in_android.pdfIn PDF document text
    • http://kaluzoxot.epizy.com/how_cold_can_a_tesla_battery_get.pdfIn PDF document text
    • https://s3.amazonaws.com/fivebo/warhammer_40k_inquisitor_martyr_trophy_guide.pdfIn PDF document text
    • http://kofodubelo.rf.gd/80860686481.pdfIn PDF document text
    • https://s3.amazonaws.com/varolexexus/93593862170.pdfIn PDF document text
    • http://gavuzolu.epizy.com/customer_journey_map_ppt_template_free.pdfIn PDF document text
    • http://dufofaj.epizy.com/32783685990.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_off0000e909.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE909 5212 bytes
SHA-256: 7ffe4033470f676a3048c734322ad44f7b15e74059f0bd8b23aa2fb7a7175b5e
font_01_sfnt_off0000fab7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAB7 10296 bytes
SHA-256: 7a8a7ed714154a273a5efe3d3dd46f76690227a64216417aef74cc5a389c0d9f

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