Malicious PDF — malware analysis report

Static analysis result for SHA-256 c869db87d5057e5e…

MALICIOUS

PDF

76.0 KB Created: 2021-03-09 15:30:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: ea9fddf6373827d06b14925fc7de910f SHA-1: 0682f8f91ea03cd92bf0714c873b3fb33b7f7445 SHA-256: c869db87d5057e5ec83004185af382326eaf1848ba2c9f60b89559eda4e49195
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to multiple external domains, including suspicious ones like 'seumenha.ru' and 'simimuvo.iblogger.org'. The presence of embedded URLs and the nature of the heuristics suggest an attempt to redirect users to potentially harmful content, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://seumenha.ru/award?keyword=agilent+1100+hplc+pdf PDF link annotation
    • http://simimuvo.iblogger.org/sarudigaxezorokiwex.pdfIn PDF document text
    • http://supermagazforsale1.xyz/7829656908375hzf.pdfIn PDF document text
    • http://fosipuzo.mypressonline.com/68907064237.pdfIn PDF document text
    • http://jelinevoj.22web.org/zerijuxejobupesigoxu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460688/normal_6027323736692.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365539/normal_5fc8958a189a5.pdfIn PDF document text
    • http://goldotzyv.ru/how_to_download_music_for_free_on_itunes_storeods6v.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378827/normal_5ff7e51a21b0f.pdfIn PDF document text
    • http://stixlife.info/ramowimenenotokulosowomadr69ly.pdfIn PDF document text
    • http://tijukilebag.getenjoyment.net/browning_a5_stalker_review.pdfIn PDF document text
    • http://it50save.info/264192685958jrb7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459941/normal_603492c8b1cc5.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/c912e2dc-14fa-4e55-85b7-37dc9d9c8579/lochinvar_combi_boiler_warranty.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dcf912c5-40ce-442d-b601-317e51952a6e/what_does_wine_mean_spiritually.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b07dd58c-41fa-4bb4-8815-757b9740a59d/how_to_make_a_logo_for_your_clothing_brand.pdfIn PDF document text
    • http://gototura.myartsonline.com/wordly_wise_3000_book_4_lesson_3.pdfIn PDF document text
    • http://gumomexad.onlinewebshop.net/totikoxumalavonazenumexaj.pdfIn PDF document text
    • http://latevafizatum.rf.gd/adhe_kangal_movie_cut_songs.pdfIn PDF document text
    • http://wibitatazureb.rf.gd/autism_guide_dogs_uk.pdfIn PDF document text
    • http://direpedokelazal.rf.gd/weralarajoditubabesuju.pdfIn PDF document text
    • http://xirewubekato.epizy.com/60071061499.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf3a5e0b-4adf-4462-a4e5-4c5d1d5db88e/bepoxetazede.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb68b1ff-7799-44be-9f58-38072fc20872/25341843223.pdfIn PDF document text
    • http://jidoxib.rf.gd/60084563232.pdfIn PDF document text
    • http://kitomov.epizy.com/dezuvu.pdfIn PDF document text
    • http://bojonovaja.rf.gd/netuli.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_off0000e529.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE529 5116 bytes
SHA-256: 8ab56efbb1362e22a328512956a074e4e66bf7bdf30351ceac2c232c663c7a70
font_01_sfnt_off0000f6a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6A3 14108 bytes
SHA-256: 0cfc3db22ec9c21884d677e6087da4fbdf63f5c9f2b575c84a1d00d7151405e6

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