Malicious PDF — malware analysis report

Static analysis result for SHA-256 916665a32bd94f59…

MALICIOUS

PDF

77.2 KB Created: 2021-03-06 04:41:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: b2973a4d26d6605678e717180d7d5903 SHA-1: f3ebf99153316b721c512c30b68010afc269f689 SHA-256: 916665a32bd94f59c67c2068b4f2329c1848e18e0cd597880e39a9241120b2c2
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing lure related to payment redirection. It contains numerous embedded URLs, including one pointing to a 'navy special pay chart', suggesting a pretext to trick users into clicking malicious links. The heuristic 'SE_PAYMENT_REDIRECT_LURE' strongly indicates a business-email-compromise pattern, aiming to deceive users about financial instructions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise 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://bologen.ru/award?keyword=navy+special+pay+chart PDF link annotation
    • http://levelupguild.com/how_to_import_bookmarks_from_another_computer1zpr1.pdfIn PDF document text
    • http://mizizufiku.mywebcommunity.org/33876792195.pdfIn PDF document text
    • http://figuxovutofid.mygamesonline.org/32864634678.pdfIn PDF document text
    • http://repaircreditscore.info/can_covid_19_cause_high_blood_pressure_to_spikeliypn.pdfIn PDF document text
    • http://menbp.online/christmas_nail_art_stickers_uk5s6ul.pdfIn PDF document text
    • http://afracheat9.xyz/28524635129zoei4.pdfIn PDF document text
    • http://lezigovedavide.getenjoyment.net/20759370239.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tizedukef.epizy.com/the_selection_book_1_epub_vk.pdfIn PDF document text
    • http://zaponabugati.epizy.com/engineering_drawing_n2_study_guide.pdfIn PDF document text
    • http://zazisuj.epizy.com/40940135914.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/afc24e53-2508-4ff7-a9b0-7a055daa455f/jukarotabaleb.pdfIn PDF document text
    • http://fomobiwudaz.rf.gd/begujapofigubopepagoje.pdfIn PDF document text
    • http://mikobiduvug.rf.gd/paxuvosabibiloligifikovux.pdfIn PDF document text
    • http://ziboporo.epizy.com/rofurorulagejakewiviti.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/989d70b9-3b81-49cd-9900-2f05a5a77356/fefabuvoxogezidoxobux.pdfIn PDF document text
    • http://gorivipap.epizy.com/27493183356.pdfIn PDF document text
    • http://kisalonokexiwi.atwebpages.com/nupibo.pdfIn PDF document text
    • http://limoxukuk.atwebpages.com/3.5e_players_handbook.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6970f35-4338-46fe-b4f1-161a6ebe9b62/pijokezuxovasogutezopu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5731641a-bb3d-4be8-8899-39e5cca6826d/will_there_be_a_movie_for_red_queen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9641b188-44e5-44c1-a96c-a73e053f42fa/madigi.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_off0000f266.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF266 5152 bytes
SHA-256: 34e8761b4d38bbbcced669cbd907ac4600d193dec4ec9c32559876f281c90935
font_01_sfnt_off000103fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103FA 10496 bytes
SHA-256: f2f8691c65ad958151295d3f853c0bcfae30d1c9951698fa124a01f1e7f8588f

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