Malicious PDF — malware analysis report

Static analysis result for SHA-256 54d342f9cb567c77…

MALICIOUS

PDF

75.7 KB Created: 2021-06-10 03:57:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dc6051be8c5744528dd6b4127be9535c SHA-1: ae5f115acb2d13bb0c4383ac36ec79880b9c51fb SHA-256: 54d342f9cb567c7760bff40b1934ab3f13c24eceded5dfda810c91b5337bf7b1
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document contains numerous external links, suggesting it functions as a link farm or a phishing lure, with one prominent URL pointing to a movie streaming site. The presence of embedded PDF links and the overall structure strongly suggest a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://laborke.ru/pbw?utm_term=wanted+2008+full+movie+online+watch
    • https://cdn-cms.f-static.net/uploads/4379236/normal_606460a7a48f9.pdf
    • https://fujareke.weebly.com/uploads/1/3/5/3/135391043/gevokakejavi.pdf
    • https://mulexiti.weebly.com/uploads/1/3/1/0/131070330/zomatun-sasimiwesin-rotujusaf-dezujipurojodo.pdf
    • https://kopomitesukov.weebly.com/uploads/1/3/1/4/131453216/tulelobimage.pdf
    • https://pamonufurudanes.weebly.com/uploads/1/3/4/6/134621962/tomedir_gujaxena_buniregikawi.pdf
    • https://dikanutedageke.weebly.com/uploads/1/3/4/4/134457663/c852f385e.pdf
    • https://cdn-cms.f-static.net/uploads/4448556/normal_60255976250c1.pdf
    • https://static.s123-cdn-static.com/uploads/4390350/normal_5fefdf03e6f24.pdf
    • https://nanukofufo.weebly.com/uploads/1/3/7/5/137516761/mamadazon.pdf
    • https://zefilezagomi.weebly.com/uploads/1/3/4/4/134474677/geniwajobamow.pdf
    • https://cdn-cms.f-static.net/uploads/4473049/normal_5fd2190e22d5b.pdf
    • https://static.s123-cdn-static.com/uploads/4409393/normal_5ff6193ae74d9.pdf
    • https://cdn-cms.f-static.net/uploads/4419235/normal_6066a6019f5ba.pdf
    • https://static.s123-cdn-static-d.com/uploads/4452851/normal_60b1a14a1c187.pdf
    • https://cdn-cms.f-static.net/uploads/4368487/normal_605da8854985d.pdf
    • https://cdn-cms.f-static.net/uploads/4419629/normal_604ef09adb186.pdf
    • https://cdn-cms.f-static.net/uploads/4411917/normal_604a333862649.pdf
    • https://cdn-cms.f-static.net/uploads/4406166/normal_5fd7c0d1e8f18.pdf
    • https://static.s123-cdn-static.com/uploads/4465565/normal_5ff2496272ecc.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://fezosubi.pbworks.com/w/file/fetch/144780585/hillsborough_county_schools_report_cards_quarter_4.pdf
    • http://nozobitativi.pbworks.com/w/file/fetch/144552342/lana_del_rey_born_to_die_album_cover.pdf
    • http://zixawedeg.pbworks.com/f/57223062206.pdf
    • http://tufukamapaf.pbworks.com/w/file/fetch/144528894/convertitore_da_centesimi_a_minuti.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd09.bin
999a3479ce93a97fc72ebee1ec8328ee9daaace4a94831936e51451e8c6542fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDD09 5500 bytes
font_01_sfnt_off0000efb6.bin
b325962184710959537c7a0aea7b7609f73890ab74f949851726ee3e35049018		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEFB6 10376 bytes
font_02_sfnt_off00011322.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11322 4324 bytes

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