Malicious PDF — malware analysis report

Static analysis result for SHA-256 244308031623baaf…

MALICIOUS

PDF

71.0 KB Created: 2021-03-08 14:57:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 5bcbc8ba6045bb3c926200c5be278a6b SHA-1: 50e1406dc7a0953089e6d5583506323e7024f909 SHA-256: 244308031623baafff39bcce265539c7bbf20cd6193c4ee964485ac7a819e828
126 Risk Score

Malware Insights

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

This PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external URIs, including one pointing to a link farm on disposable hosting, suggesting an attempt to redirect users to malicious sites. The document body is heavily obfuscated, but the presence of embedded URLs indicates a likely intent to lead the user to a compromised or malicious web page.

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 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://soxebez.ru/wix?keyword=pillars+of+the+earth+rules+pdf PDF link annotation
    • http://bottlechainworld.com/slacker_music_playerub4ml.pdfIn PDF document text
    • http://pressit.fun/69371128605monvd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487007/normal_5fedbec75e2d1.pdfIn PDF document text
    • http://busivel.xyz/jijogudopojakawabubavejok935vo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407789/normal_6045561525710.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416512/normal_5fce10be17bcb.pdfIn PDF document text
    • https://lagonola.weebly.com/uploads/1/3/4/8/134851586/jomuva_wukazanonas_zafujiwo.pdfIn PDF document text
    • http://mivibowefumar.iblogger.org/worksheets_on_rational_numbers_images.pdfIn PDF document text
    • https://gisijenoxumo.weebly.com/uploads/1/3/1/4/131437849/8180671.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481166/normal_6008e71721d8f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472775/normal_600b6495bb6af.pdfIn PDF document text
    • http://mignonette.space/teacup_pomeranian_puppy_for_sale_teddy_bear_face5z0ix.pdfIn PDF document text
    • http://merishwheelrecords.com/decision_tree_algorithm_in_r_language2hrm7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/f44b7fc1-d55d-4e39-ab51-84c195d18cfb/phrasal_verbs_con_get.pdfIn PDF document text
    • http://gisoduriri.rf.gd/gopolegofedawiwowiwa.pdfIn PDF document text
    • http://lafasusatar.rf.gd/9889318213.pdfIn PDF document text
    • http://riberudedanute.epizy.com/telcordia_sr_332_issue_3.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b63b8272-7579-46fb-b7b9-e18451965af9/dusk_till_dawn_full_movie_free_download.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_off0000daa6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAA6 5132 bytes
SHA-256: 707f636146ebf3b803a0110fd51d216b46a42ff9d42ec494353fb51af9ad9d3c
font_01_sfnt_off0000ec17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC17 10152 bytes
SHA-256: 2302d2c94737851ce409dfb37556715b3a00b214386a0b8b73e2d5e296107c2c

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