Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6531fc97eaaba5d…

MALICIOUS

PDF

73.7 KB Created: 2021-03-24 16:13:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: f7f8ddf2ca82e0639b05dbea2b05c5f2 SHA-1: d1a5901e86bf7f1b577bd16b15c011d85b1a9167 SHA-256: f6531fc97eaaba5dad22920c783585134b917a6d5b6220d002389b8ea3fe0ec8
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. It contains numerous embedded URLs, with one prominent URL pointing to 'dugedepap.ru' which is likely a phishing or malware distribution site. The document body, though heavily obfuscated, contains keywords related to pricing, suggesting a lure to a fraudulent offer.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://dugedepap.ru/strik?utm_term=avaya+ip+office+500v2+price PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4417315/normal_5ff3a7475528a.pdfIn PDF document text
    • http://nefupanono.mygamesonline.org/total_africa_cup_of_nations_2020_programme.pdfIn PDF document text
    • http://xufopizaxeto.medianewsonline.com/37809967438.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420438/normal_6017d92a168c5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501770/normal_6037cb1785119.pdfIn PDF document text
    • http://biweekamnf.com/mercruiser_4.3_mpi_horsepowerr8inn.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4504568/normal_6004b2435b9f9.pdfIn PDF document text
    • http://simcars.ru/14882314934owpe5.pdfIn PDF document text
    • http://weridif.medianewsonline.com/star_spangled_banner_chords.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454303/normal_602b5dc730095.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jupudizadid/vampire_diaries_season_9.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a0e1fcf5-2722-44f4-9fd1-23533b2f9619/86144140417.pdfIn PDF document text
    • http://lifobem.myartsonline.com/18834277888.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe31124e-c627-4df4-b13a-c9c6b36b08bd/how_to_bypass_the_lid_lock_on_a_whirlpool_cabrio_platinum_washer.pdfIn PDF document text
    • https://s3.amazonaws.com/lupuvogotog/48831786719.pdfIn PDF document text
    • https://s3.amazonaws.com/sinamozagemoger/loziwekebeniligux.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/186ac030-51c0-4521-941e-bee92aeff018/xupezogozodivakigunos.pdfIn PDF document text
    • http://rabatelekovufar.myartsonline.com/all_the_kings_horses.pdfIn PDF document text
    • http://xovolefewawex.atwebpages.com/wokogalinolovakiwegowaju.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/57218c12-5c06-49ec-9dc1-2a5696105416/tuesdays_with_morrie_life_lessons_quotes_with_page_numbers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c17323f4-76b6-44ef-bfe2-728c5a467eca/ap_spanish_literature_literary_terms.pdfIn PDF document text
    • https://s3.amazonaws.com/satedafadusizo/santa_bhai_full_video_song.pdfIn PDF document text
    • https://s3.amazonaws.com/puretulenuza/anybody_can_dance_2_movie_songs.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_off0000e1fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1FB 5348 bytes
SHA-256: 1b4ae6960ecef6a94822faa8dbe2ea66e72f799b8184d2df63e89e88788a2e79
font_01_sfnt_off0000f45a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF45A 10872 bytes
SHA-256: 6d75d36580916765453aed1343611dd2f168dc590d8dd2e7f607fe13984aa429

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