Malicious PDF — malware analysis report

Static analysis result for SHA-256 7552d3c3350955e8…

MALICIOUS

PDF

72.6 KB Created: 2021-03-12 18:52:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 39b4c6db951ea5594cdffcb3f52ff7c0 SHA-1: cbeb80a3277da2f363a05130eb7cf69d6686df14 SHA-256: 7552d3c3350955e8e2eb4b46edb49aa46d8d664b5041e8f012bbf2fb4194a3b9
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm or SEO manipulation tactic. One of the primary URLs extracted is 'https://soxebez.ru/award?keyword=kebangkitan+etnis+menuju+politik+identitas+pdf', which appears to be part of a phishing or scam lure. No scripts were extracted, but the PDF structure and numerous external links are indicative of a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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.
  • 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://soxebez.ru/award?keyword=kebangkitan+etnis+menuju+politik+identitas+pdf PDF link annotation
    • http://xogavuw.medianewsonline.com/bewovowijufofidup.pdfIn PDF document text
    • http://koteyarn.moscow/sikatatuzovuba0c8t5.pdfIn PDF document text
    • http://chategratis.online/barbie_girl_dress_up_games97k5h.pdfIn PDF document text
    • http://rebibedo.mywebcommunity.org/craftsman_30cc_4_cycle_weed_eater_oil.pdfIn PDF document text
    • http://wekeb.space/relative_location_of_canberra_australiacpxgx.pdfIn PDF document text
    • http://giocodigital.fun/sat_december_2018_test_answers92ur8.pdfIn PDF document text
    • http://nizuloxodiza.iblogger.org/man_the_unknown.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdfb6f36-dde2-4af5-b3b7-55ff39976061.filesusr.com/ugd/c6ac46_71728c5fb04c41edb397a201807becc5.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6fcfddb-cc4e-4a59-94db-92bc2f3888a0/interactions_2_listening_and_speaking.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f068437-75e6-4a20-a962-23f976ea1dfc/genie_garage_door_opener_troubleshooting_stb.pdfIn PDF document text
    • http://zarilapaserit.rf.gd/how_to_reverse_engineer_any_software.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c0570f42-0fc2-4f3c-9ce4-70bc6487d2ad/lutitabojov.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c53441b-590a-4f31-ada7-68c7bdea4d55/walenejikuvurilowusesul.pdfIn PDF document text
    • https://0f4267a5-27df-427f-b7ff-de3c6d4a4cd0.filesusr.com/ugd/9e4921_5a33216d0af642a29b34b8e2c2da5164.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/727bbf76-cbb3-4bd9-8ece-510560b05b51/zuxegor.pdfIn PDF document text
    • https://ab60d57a-1f92-408f-9079-0b325776b613.filesusr.com/ugd/724fb5_a7de867b79b94141a2d951a8f02575a5.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2759b39-bbea-4941-bac2-5066b92e4604/nordictrack_c700_treadmill_walking_belt.pdfIn PDF document text
    • https://13cfbe10-32e4-4d7a-9072-8dbd3280e6b8.filesusr.com/ugd/994e9e_56934d5fd7aa4683897c4ebf85c71ba1.pdf?index=trueIn PDF document text
    • https://19f621d4-ab03-49b5-bf1d-c78de40104d4.filesusr.com/ugd/bc84a3_f305836233c145038173ac6623c57fce.pdf?index=trueIn PDF document text
    • http://pupukoxofamisa.rf.gd/dusk_till_dawn_movie_song.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ecd60cf5-72b3-4400-9c6b-d9f6cfbe72cb/16899934312.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/afaf3062-aac2-4891-9f1b-0d8c4d4eb26c/bts_learn_korean_books.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_off0000df73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF73 5512 bytes
SHA-256: a766a886dd18da9c341a74b643dcd652e767c72afd6195ef4da8a848d10968c3
font_01_sfnt_off0000f22c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF22C 10132 bytes
SHA-256: f5f6ae7d06579d9246e6d34fabfbec2c6b3abb736475f30711c362fa5dca4003

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