Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb5d3b4bf048e68f…

MALICIOUS

PDF

69.4 KB Created: 2021-03-15 10:00:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 183b54807062f024fe16c23ac268125f SHA-1: b7d6b9c391b79832681c96dd4e34ed51bee0f7cc SHA-256: eb5d3b4bf048e68f78c88dbaef31e2f1cdfd3ed7d79edf77ad6a1895c3f5d536
226 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, exhibiting characteristics of a phishing lure. The document contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious sites. The heuristic 'SE_PAYMENT_REDIRECT_LURE' indicates the content likely attempts to trick users into changing payment details, a common tactic in business email compromise attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://jottigo.ru/123?utm_term=always+on+display+samsung+j5+prime PDF link annotation
    • http://felojagiwubabu.iblogger.org/feketuwona.pdfIn PDF document text
    • https://cdn.sqhk.co/xaveredero/dIagjge/good_road_trip_games_to_play.pdfIn PDF document text
    • http://kuroramogesok.iblogger.org/78883126618.pdfIn PDF document text
    • https://cdn.sqhk.co/fojevimexu/elsjejc/betadu.pdfIn PDF document text
    • https://cdn.sqhk.co/dukoredod/icietoE/ns_express_courier_tracking.pdfIn PDF document text
    • http://kuvewumewatono.22web.org/thank_you_lord_for_loving_me_unconditionally.pdfIn PDF document text
    • https://cdn.sqhk.co/tiwefuxab/ibEwcih/semem.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://8d6920c1-aef5-45ed-b1a0-e693d63948fb.filesusr.com/ugd/0a593f_3a4ae76372e347e2a015e38359fa6e29.pdf?index=trueIn PDF document text
    • https://b7af6bb9-01eb-4839-ab56-764651de4344.filesusr.com/ugd/2486b5_b9e8669a5e0c4d8da487714acf4616dc.pdf?index=trueIn PDF document text
    • http://japuxizikaroviv.rf.gd/verabozigomesulun.pdfIn PDF document text
    • http://nataxos.epizy.com/vokoxo.pdfIn PDF document text
    • https://42e65457-ec34-4553-8979-78b6e302f774.filesusr.com/ugd/f1976d_5b2341c34648406b87b98ec80e2d947b.pdf?index=trueIn PDF document text
    • https://ff06b2c9-6223-4357-b4d5-1bf3807c749f.filesusr.com/ugd/717131_e16bec118d544b408214005391d314b4.pdf?index=trueIn PDF document text
    • https://d45380bd-a93d-4ef2-b2bd-4c7806d1f6db.filesusr.com/ugd/5d2cf3_cdd5c991a84b45e98db5571ca749411d.pdf?index=trueIn PDF document text
    • https://4cf2acc4-d143-4013-a78d-f21de0873c4f.filesusr.com/ugd/e4636f_15a2592db2224b178cbda98bf79b7e31.pdf?index=trueIn PDF document text
    • https://8909b315-4d59-4940-aabf-0fdaa532e0ad.filesusr.com/ugd/4542d9_a11ca9f0469449b9be822440c44b74ce.pdf?index=trueIn PDF document text
    • http://dezezefisimel.rf.gd/tazanepazexixogejada.pdfIn PDF document text
    • http://xiriranur.epizy.com/mapodizapunurajabanadoju.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_off0000d137.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD137 5664 bytes
SHA-256: d5be9996d8e164e71bde73285dc778c66fa3d1bab9bf83e5add999462f165568
font_01_sfnt_off0000e48e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE48E 10476 bytes
SHA-256: 6d1b1537bfb88d5f59bea5c4e7ce1eb387aac8546f3e731df3c2905d8ca37514

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