Malicious PDF — malware analysis report

Static analysis result for SHA-256 6bd228b46c73abfc…

MALICIOUS

PDF

78.9 KB Created: 2021-04-28 23:52:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: afcc337ae5533f3fc7fbcbe9d601371c SHA-1: 6bb78542ad8a79ebd9e4f4957d3bb0766c6d954e SHA-256: 6bd228b46c73abfc08df3f69bd41a5f7dbae3901e4a22dd0bcea0ab37d1de8e8
126 Risk Score

Malware Insights

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

The PDF file contains embedded URLs and heuristics indicate it is a link farm on disposable hosting, with one URL pointing to a suspicious domain. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery. No scripts were extracted, but the overall structure and URL usage point towards a social engineering attack.

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://midufefew.ru/strik?utm_term=how+to+be+baptized+in+the+holy+spirit+and+fire PDF link annotation
    • http://timedezalug.iblogger.org/ctet_answer_key_december_2018.pdfIn PDF document text
    • http://ig-copyrightviolation.com/fire_and_ice_game_of_thrones_lyricsmps90.pdfIn PDF document text
    • http://harkateine.fun/654142585241m3po.pdfIn PDF document text
    • http://dazolovegom.mygamesonline.org/animorphs_book_13.pdfIn PDF document text
    • http://tusiteguluvora.getenjoyment.net/32574233964.pdfIn PDF document text
    • http://hydraruzxpnew4af.exchange/dungeons_and_dragons_character_sheet_example6qxcx.pdfIn PDF document text
    • https://cdn.sqhk.co/novimabe/laTnia0/black_line_dance_songs_2019.pdfIn PDF document text
    • http://rijexofugovu.medianewsonline.com/lexeregapumilizirojumolo.pdfIn PDF document text
    • http://edapog.online/adobe_after_effects_video_templates_free6bz43.pdfIn PDF document text
    • http://regifugujuvu.iblogger.org/dell_poweredge_2900_weight.pdfIn PDF document text
    • http://mkuu.club/rebel_ice_cream_flavors_walmartrk5ny.pdfIn PDF document text
    • https://cdn.sqhk.co/wavivatus/jh0zia2/snapple_apple_case.pdfIn PDF document text
    • https://cdn.sqhk.co/poronujefino/iahaujl/truck_parts_near_me_open_now.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/jinabom/fudoxobuwetujisasa.pdfIn PDF document text
    • http://kigagizotag.onlinewebshop.net/14713079780.pdfIn PDF document text
    • http://zirafefovijab.epizy.com/pizaluwa.pdfIn PDF document text
    • https://s3.amazonaws.com/dafumuxitupav/85302600910.pdfIn PDF document text
    • https://s3.amazonaws.com/kelukakeb/tupir.pdfIn PDF document text
    • http://desiwafinu.epizy.com/water_bottle_labels_template_size.pdfIn PDF document text
    • http://duloxiwajur.rf.gd/59063338593.pdfIn PDF document text
    • https://s3.amazonaws.com/lakadutof/bumasilori.pdfIn PDF document text
    • http://xowobovu.myartsonline.com/sql_queries_interview_questions_for_experienced.pdfIn PDF document text
    • http://lokokojorivumi.rf.gd/ingenuity_inlighten_swing.pdfIn PDF document text
    • http://rokalugafujat.rf.gd/98643491003.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_off0000f31d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF31D 5476 bytes
SHA-256: 1650d451b5ec13c97b1dfc8eefdb99bfc94c7e4fb72924e5013d03331095dbf9
font_01_sfnt_off000105ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105CA 11508 bytes
SHA-256: 9fb3a2737545b742118a934584a3a2522d887a4e63b0d053c99110da0240679e

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