Malicious PDF — malware analysis report

Static analysis result for SHA-256 8dbd1fe852955999…

MALICIOUS

PDF

83.4 KB Created: 2021-04-25 00:48:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: a03965275eacc50df322e22d399c61b4 SHA-1: b087f5dd11b75fd43a9659af126778446901ded3 SHA-256: 8dbd1fe8529559993afe024e298c3c79f3d79de8e31e80c6549a26ebcf07c66b
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, with one specifically linked to a lure about 'goat simulator payday trophies ps4', suggesting a phishing or malware distribution attempt. The presence of multiple disposable domains and UTM parameters further supports a malicious campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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 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/strik?utm_term=goat+simulator+payday+trophies+ps4 PDF link annotation
    • http://avto-trokot.xyz/zeganubekeveberexid544ea.pdfIn PDF document text
    • https://cdn.sqhk.co/ruxuzobisu/ibghigc/labogudanaxuzojupuj.pdfIn PDF document text
    • http://allfreebets.ru/sermons_outlines_notesucovg.pdfIn PDF document text
    • http://sayseedokg.com/7806170014oql31.pdfIn PDF document text
    • http://yourcy.com/how_to_fix_a_camera_that_wont_turn_on4e0k6.pdfIn PDF document text
    • https://cdn.sqhk.co/sedazozesufu/iZTmid0/the_walking_dead_season_2_good_choices.pdfIn PDF document text
    • http://spiritstudio.ru/70586845633w1g57.pdfIn PDF document text
    • http://kefojixesopu.66ghz.com/achtung_baby_book.pdfIn PDF document text
    • https://cdn.sqhk.co/wedowetaso/ZTjixQr/3718599897.pdfIn PDF document text
    • http://itrom.fun/why_wont_my_landline_phone_worky67rt.pdfIn PDF document text
    • http://atomlinux.com/40531516103i3uvc.pdfIn PDF document text
    • http://perevod24-card2card.site/florida_highway_safety_and_motor_vehicles_checktsagi.pdfIn PDF document text
    • https://cdn.sqhk.co/morovujefi/gcRjjhc/65510309686.pdfIn PDF document text
    • http://punijarojivil.iblogger.org/jozusejojomofekuzo.pdfIn PDF document text
    • http://hushseo.online/34349977594z1osn.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/a41e3226-dd79-4ac6-b0cd-ee1745469577/bamobevokegidek.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c86caaed-5c4e-4b68-a9f8-81989cc283d1/britax_romer_car_seat_installation_forward_facing.pdfIn PDF document text
    • http://kojevarokor.rf.gd/who_broke_the_treaty_of_hudaibiya.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e52aac4d-f171-4b45-98ca-6e48dd044992/27696948913.pdfIn PDF document text
    • http://zaxigadanu.rf.gd/alternator_troubleshooting_guide.pdfIn PDF document text
    • http://gawevoniko.rf.gd/the_first_90_days_template_excel.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_off000107cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107CD 5420 bytes
SHA-256: 91f5efc355d6ae6bb5b410411684da08c2ca13a826d73f21c163b6f34a96f2b0
font_01_sfnt_off00011a1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A1E 11264 bytes
SHA-256: 96a4bec0296738d51f084d1b2a4ee7faf9a0af85d229a105b3806e91c7b76ddb

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