Malicious PDF — malware analysis report

Static analysis result for SHA-256 e05de6c1db83c37a…

MALICIOUS

PDF

87.7 KB Created: 2021-03-09 11:29:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: ca0b1417b4bf6839b43c610718345724 SHA-1: 060db4e0df89b86d289036829953fd22f2cdb585 SHA-256: e05de6c1db83c37a15455bbfa8313c8aa339fe9d1682935150b3ab259611681e
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ML classification and ClamAV, as malicious. It contains a link farm pointing to numerous external PDF files, many hosted on disposable domains, suggesting a phishing or SEO spam campaign. The primary URL, https://xezojetit.ru/award?keyword=top+down+approach+and+bottom+up+approach+pdf, indicates a lure related to academic or business concepts to attract clicks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • 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.
  • 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://xezojetit.ru/award?keyword=top+down+approach+and+bottom+up+approach+pdf PDF link annotation
    • https://cdn.sqhk.co/sifalavuxozo/ccMgghe/rekofiwirajajasi.pdfIn PDF document text
    • http://mitutepoka.medianewsonline.com/tivunuronuwora.pdfIn PDF document text
    • http://bomepufibawil.scienceontheweb.net/kewitizajudefejo.pdfIn PDF document text
    • https://tuxutumixebapi.weebly.com/uploads/1/3/1/4/131438514/metujanetovake.pdfIn PDF document text
    • http://giwosoto.sportsontheweb.net/pekimosaz.pdfIn PDF document text
    • https://zopoxetofosifa.weebly.com/uploads/1/3/4/8/134863155/9052917.pdfIn PDF document text
    • https://cdn.sqhk.co/japedovak/chd0jjY/guide_for_one_punch_mobile_the_strongest_character.pdfIn PDF document text
    • https://gefizubumob.weebly.com/uploads/1/3/4/4/134473977/xutojajebiler_gekusomatuta.pdfIn PDF document text
    • https://leximefowa.weebly.com/uploads/1/3/2/6/132680903/kebozagip-zusigo-vojafa-vobap.pdfIn PDF document text
    • https://xivovawa.weebly.com/uploads/1/3/4/8/134875493/2f7bc.pdfIn PDF document text
    • http://wubujonil.getenjoyment.net/does_taco_bell_have_the_chili_cheese_burrito.pdfIn PDF document text
    • https://cdn.sqhk.co/turanexode/wvqKljf/vobijajedurerimedal.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://c7f0abc7-d23b-482d-bd16-0771495bb668.filesusr.com/ugd/bb13a2_e823e420b98e4ae793cd321466e60435.pdf?index=trueIn PDF document text
    • http://laguzovola.rf.gd/bacharach_h10_pro_manual.pdfIn PDF document text
    • https://e8f98835-b194-42a5-b43f-fe2f29920dd6.filesusr.com/ugd/bf650e_168fe35037744a1eae5e55658a3feb8a.pdf?index=trueIn PDF document text
    • https://c1bbde11-5cda-4f7c-8b74-b2fe90b484f5.filesusr.com/ugd/1c8c6c_db6a9dbac40742f4b9d323777349af3f.pdf?index=trueIn PDF document text
    • http://pebimomedunuzux.epizy.com/white_bass_fishing_report_bull_shoals.pdfIn PDF document text
    • https://f730d15c-1921-46d2-b6d4-288333e40990.filesusr.com/ugd/e2c223_52c23e81c5bc4cdba897729b8028323d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xapidajovaji/championship_manager_1998_99_free.pdfIn PDF document text
    • http://zogutofarori.epizy.com/43913739533.pdfIn PDF document text
    • http://vetarobafawuk.epizy.com/sublime_text_3_html_formatter.pdfIn PDF document text
    • https://57fc24c6-ba7c-430a-bdae-05304608b610.filesusr.com/ugd/bc9c68_3fa448241b094b93bdfce49d2f133b62.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lunojol/endeavour_episode_guide_season_5.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_off00011c02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C02 5368 bytes
SHA-256: 365b2f2186e33af83a2942002306ebee7d2062b0386354bc889cd8e86a98c6d7
font_01_sfnt_off00012e2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E2D 10272 bytes
SHA-256: 3c292c5e25a4f028573786160978b39f212bb9357ace38201976c6c3a0e4ac65