Malicious PDF — malware analysis report

Static analysis result for SHA-256 ffe6447287bbe070…

MALICIOUS

PDF

70.5 KB Created: 2021-03-06 22:21:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 6c0257e53cf30b178ac30c178376ac46 SHA-1: 8a5680dbf957f0258b4e069fa5be16310dca135b SHA-256: ffe6447287bbe0702c573bf6d4355f03dec242047e78f898acd4a2c149229108
166 Risk Score

Malware Insights

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

The sample is a PDF document flagged as malicious by ClamAV and an ML classifier. Heuristics indicate it functions as a link farm and a payment redirection lure, suggesting a phishing attempt. The document body, though heavily obfuscated, contains text related to financial transactions, reinforcing the phishing lure. Several external URLs were extracted, some pointing to disposable domains, which are likely used to host malicious content or redirect users to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://ponafet.ru/strik?utm_term=is+sao+16.5+canon PDF link annotation
    • http://alcexpress3.xyz/29235577665yh4l2.pdfIn PDF document text
    • http://begemotiks.fun/kinobedizc84ck.pdfIn PDF document text
    • http://community-day.ru/21375568524e33vl.pdfIn PDF document text
    • http://galajanexagaj.iblogger.org/riwosik.pdfIn PDF document text
    • http://mitatizizuje.mypressonline.com/vb.net_2010_tutorial.pdfIn PDF document text
    • http://moitender.org/noxibaxesozojusezofinpik7i.pdfIn PDF document text
    • http://vodoroding.info/what_did_leta_lestrange_do_to_grindelwaldyxsvm.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gozuketitara.onlinewebshop.net/what_2nd_graders_need_to_know.pdfIn PDF document text
    • https://5663e088-3595-439c-971a-5873693bee35.filesusr.com/ugd/e98895_351d215d4f7341329ba2639ca5198fd8.pdf?index=trueIn PDF document text
    • http://mepizegavipin.rf.gd/wills_eye_reviews.pdfIn PDF document text
    • https://s3.amazonaws.com/jufowokedunod/nalokumetopebekezikafusu.pdfIn PDF document text
    • http://wiwosotu.myartsonline.com/gawunejewa.pdfIn PDF document text
    • https://e9593579-f51f-4dc6-af55-2543ab512b45.filesusr.com/ugd/37952c_6e890735acf84054b2b05a7c38387577.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/degisapemifa/citra_3ds_android_emulator.pdfIn PDF document text
    • http://fuguzametekobo.myartsonline.com/religion_what_does_it_mean_to_me_essay_brainly.pdfIn PDF document text
    • http://kakofuwogo.epizy.com/the_art_of_the_deal_movie_watch_online.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_off0000d750.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD750 4964 bytes
SHA-256: 39998a27a4916671f61d6020f0a9d45f92142acbc912febaeac572f59cc5c765
font_01_sfnt_off0000e857.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE857 10888 bytes
SHA-256: 1b72b04667c285b21fc23a08bbff1d5e9168feac6efc2cdceb998760172f123f

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