Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfdffcca4e6bfcef…

MALICIOUS

PDF

77.0 KB Created: 2021-03-28 00:14:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 35db56691335ee030ea105f97012b283 SHA-1: 36ef756827818411738b8feff30b8fdcb291000c SHA-256: dfdffcca4e6bfcef8598eee197cb3fafd7158a7bbbcffac76afe4ccef6dad550
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URIs pointing to external websites, with one notable URI being `https://seumenha.ru/wix?keyword=escalon+sportsman+club`. The presence of many links on disposable hosting suggests a link farm or phishing attempt to redirect users to malicious content. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://seumenha.ru/wix?keyword=escalon+sportsman+club PDF link annotation
    • http://duwemoguf.22web.org/flowers_for_algernon_one_act_play.pdfIn PDF document text
    • http://gibelepij.scienceontheweb.net/project_business_case.pdfIn PDF document text
    • http://fexevewuli.mypressonline.com/tuwiwagatameju.pdfIn PDF document text
    • http://jemerujaw.22web.org/lubim.pdfIn PDF document text
    • http://kirakexig.mypressonline.com/zutonotu.pdfIn PDF document text
    • http://ludoritepiru.22web.org/33453913993.pdfIn PDF document text
    • http://vugekowuzujed.scienceontheweb.net/vevolebugobizux.pdfIn PDF document text
    • http://vijevejumozugim.sportsontheweb.net/95189833626.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b67da43-c88c-4889-937b-f77813172f03/xapiviwe.pdfIn PDF document text
    • http://gojexigubobe.epizy.com/haareya_song_ringtone.pdfIn PDF document text
    • https://6d5fec37-5936-4ae8-8938-03a86e982f09.filesusr.com/ugd/d4da64_28118128ae2446f388eee5a6119b62ea.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/293d2322-b857-4459-a65f-3e2775ff8c81/muata_ashby_quotes.pdfIn PDF document text
    • http://xigunisemavi.epizy.com/vegetable_soup_recipe_instant_pot.pdfIn PDF document text
    • http://besinaxot.epizy.com/biodegradable_definition.pdfIn PDF document text
    • http://nirepuxakidogu.rf.gd/rotilukojexakemudaw.pdfIn PDF document text
    • https://19e6fc83-c281-4d06-93fd-e8b16a02b90a.filesusr.com/ugd/ce5d00_1e98fcebf8fa43dd9c2889a56bc1577a.pdf?index=trueIn PDF document text
    • http://pariwexeral.epizy.com/bramble_cocktail_diffordsguide.pdfIn PDF document text
    • https://041aa876-b65b-432c-96c0-58c8b295a4e4.filesusr.com/ugd/90d19e_f581cb8874554d18953a9410ddf40963.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e8e302a-6fc0-4f73-a53c-9fdc2304eced/25172137657.pdfIn PDF document text
    • http://xuxaxux.rf.gd/48230722153.pdfIn PDF document text
    • http://rojarapimavokiv.rf.gd/48538595142.pdfIn PDF document text
    • http://josuguremim.epizy.com/12453033113.pdfIn PDF document text
    • http://rusavuwirajul.rf.gd/thoracic_aortic_dissection_guidelines.pdfIn PDF document text
    • http://dovukixopajiduw.epizy.com/cg_vyapam_admit_card_2019_ppt.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7485f029-c865-493a-837b-b43076e2c5dd/what_are_the_five_goals_of_sentencing.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3dc24b88-37eb-4906-b7ba-6376325e046b/wildgame_innovations_shadow_trail_camera_reviews.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_off0000ef3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF3D 5176 bytes
SHA-256: 75714eb4ac5c5cae40f60d6ef4633b6d3d989da014316c31b1a6901741df4405
font_01_sfnt_off000100c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100C1 10696 bytes
SHA-256: b8870eabb06c7f779c07ef68de39e7cf9f85858696b607d11df1e13305644ae0

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