Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe400c884aa4249a…

MALICIOUS

PDF

76.1 KB Created: 2021-03-31 05:45:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 0751cc18e4e4c510035975bd1b11b853 SHA-1: 3f367f4ed9165a2d940de92bcc92be294b103981 SHA-256: fe400c884aa4249a2930626df743e6ea3be8d8924f6ea1103e1c4ec00bb903eb
126 Risk Score

Malware Insights

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

The PDF file contains embedded URLs and is flagged by multiple heuristics as malicious, including a ClamAV detection for Pdf.Phishing.Trojan. The document body, though heavily obfuscated, suggests a lure related to 'anorexia workbook pdf'. The presence of numerous disposable domains and link farms indicates a phishing or scam attempt. While no scripts were directly extracted, the PDF structure and embedded URIs are indicative of malicious intent, likely to redirect users to a phishing site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • 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 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://baarspo.ru/award?keyword=anorexia+workbook+pdf PDF link annotation
    • http://fuvesozufinefi.medianewsonline.com/226580784.pdfIn PDF document text
    • http://tofabukusakuni.22web.org/78026848246.pdfIn PDF document text
    • http://mematukifimuf.iblogger.org/applied_physics_book_for_engineering.pdfIn PDF document text
    • http://zabemaladameg.medianewsonline.com/kofirafonuser.pdfIn PDF document text
    • http://fufejezonodim.mywebcommunity.org/11635003204.pdfIn PDF document text
    • http://genonobamubus.22web.org/6730359865.pdfIn PDF document text
    • http://xatakafigudu.getenjoyment.net/vosotamuxotikogufulupa.pdfIn PDF document text
    • http://weridif.medianewsonline.com/nogitusogomumexira.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/tarajix/informal_meeting_agenda_template_free.pdfIn PDF document text
    • https://cc968bdf-8a18-4a65-a72d-893c706ef441.filesusr.com/ugd/bae363_fa956518a73c4cb282a992db4e22f301.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f35b1195-6f99-477a-8535-6418ea7bed17/zogezebijenawaga.pdfIn PDF document text
    • https://s3.amazonaws.com/jadere/zebatabibi.pdfIn PDF document text
    • http://lexireto.epizy.com/19747070918.pdfIn PDF document text
    • https://4dcfe184-cd6c-48f8-9f23-5461c743a1d4.filesusr.com/ugd/cc8533_b0cc7d2b0dde45d780137d218947fd13.pdf?index=trueIn PDF document text
    • http://togipumenotu.epizy.com/kadizozivunoguxisazaseri.pdfIn PDF document text
    • https://s3.amazonaws.com/juzowilipi/ololoid_meme_generator_app.pdfIn PDF document text
    • http://temitugefowe.epizy.com/shark_navigator_model_nv22l_26.pdfIn PDF document text
    • https://4b3b4da4-1145-40fd-8a04-0ac29766dab0.filesusr.com/ugd/6c6203_657756a6f0a44d0ebbbf0db0d3eee927.pdf?index=trueIn PDF document text
    • https://88749095-6fd7-453f-8e8a-15b48fe47dd1.filesusr.com/ugd/e4d7df_78a859b12d3f4838b9bd2cfab188436f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/9cb522de-b7da-4083-abd6-4b308c7684c7/dikedijumovasomidivu.pdfIn PDF document text
    • http://babefuv.epizy.com/bible_old_testament.pdfIn PDF document text
    • http://vezuzatutuxi.epizy.com/formal_synonym_for_all_in_all.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39328749-a6cc-4829-94b6-e0ed06719283/brene_brown_power_of_vulnerability_audible.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7dcdd458-2de2-4b3f-acd3-7a4bb0d5a94d/craftsman_yt_3000_21_hp_oil_filter.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_off0000ecdb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECDB 5176 bytes
SHA-256: f416834fbca96ac1dac6e2a2502e4a474850f0c0043c847cb292d881c8f007ff
font_01_sfnt_off0000fe9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE9D 10660 bytes
SHA-256: 161e4ac5fefc9b775d9ef6092237ba043e9865c153a93dd5ee7aeed8592bf5f8