Malicious PDF — malware analysis report

Static analysis result for SHA-256 b96cd75a2d6b6192…

MALICIOUS

PDF

71.2 KB Created: 2021-02-18 04:33:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 009087ec89a555a2a1b149e961344942 SHA-1: 5fccb23d69a478cc3ec8b34b51994ff884b95941 SHA-256: b96cd75a2d6b61927135ca5dd1b025080efd30cb9ddec6a51fd8bee03633929e
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains and link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The presence of external URIs and the structure of the PDF, which appears to be a link farm, support the classification as a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://maypoin.ru/aws?utm_term=haier+portable+air+conditioner+drain+hose PDF link annotation
    • https://cdn.sqhk.co/zenetofuma/f5gejje/46797937983.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381973/normal_601b925f90941.pdfIn PDF document text
    • https://cdn.sqhk.co/rezeribevi/ifA4jcy/53000146327.pdfIn PDF document text
    • https://cdn.sqhk.co/guxuboru/Zhf9nz7/infinite_growth_game_hack.pdfIn PDF document text
    • https://cdn.sqhk.co/wamefuvew/vbOjjhg/zeus_and_his_father_cronus_story.pdfIn PDF document text
    • https://cdn.sqhk.co/liweruruzed/kjjhaPe/50010241759.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409840/normal_5fd2d3753a5bf.pdfIn PDF document text
    • https://cdn.sqhk.co/xedaberetaj/FjdFhcn/no_1_trending_video_on_youtube_worldwide.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/rozebofukixus/xalipod.pdfIn PDF document text
    • http://velevemi.epizy.com/bevanekijivibe.pdfIn PDF document text
    • http://ditajizuru.rf.gd/rose_gold_platform_shoes.pdfIn PDF document text
    • https://s3.amazonaws.com/zakunafu/springfield_ohio_weather_report.pdfIn PDF document text
    • http://vejebuta.rf.gd/catholic_answers_live_radio_club.pdfIn PDF document text
    • http://zizematav.epizy.com/difference_between_organised_and_unorganised_sector.pdfIn PDF document text
    • http://giratas.epizy.com/aptoide_apk_free_for_mi_tv.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ccce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCCE 5048 bytes
SHA-256: 36023e1475afda0d04e49e9962cbcacd18d45a04318a3f132c33cd1045301a55
font_01_sfnt_off0000ddd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDD2 10532 bytes
SHA-256: a58628358e711ee138b705a2f3fcffc92227d55439155d24c0e085ccaa0955a4
font_02_sfnt_off000101b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101B5 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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