Malicious PDF — malware analysis report

Static analysis result for SHA-256 695246cd3ae9f326…

MALICIOUS

PDF

76.6 KB Created: 2021-06-13 14:02:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d614243afe312c1a5a0d63a8a17b5295 SHA-1: 79b2e6f94e2d98e99ea0b4bc5d88a7872bea74bf SHA-256: 695246cd3ae9f326116c9daf7e8abf862b8b1c9d09e4e9b8167282d1282bd602
96 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 an embedded URI pointing to 'ketchas.ru', which is likely used for phishing or to host a secondary payload. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://ketchas.ru/pbw?utm_term=compare+contrast+photosynthesis+and+cellular+respiration
    • https://static.s123-cdn-static.com/uploads/4409258/normal_5feb58f7b480a.pdf
    • https://cdn-cms.f-static.net/uploads/4366969/normal_605ae131d67b8.pdf
    • https://cdn-cms.f-static.net/uploads/4382781/normal_6018d77947fa4.pdf
    • https://cdn-cms.f-static.net/uploads/4456122/normal_60371091a9856.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/6d8de4f9-5b1c-4d88-9f3d-c260a5bbc8f3/celebrate_recovery_advanced_leadership_training_guide.pdf
    • http://niwomif.pbworks.com/f/shree_krishna_govind_hare_murari_ramanand_sagar_mp3_download.pdf
    • http://sutodoromar.pbworks.com/w/file/fetch/144489762/how_to_get_free_v_bucks_ps4_without_human_verification.pdf
    • http://xesimisejek.pbworks.com/w/file/fetch/145125639/vutimimagugujiza.pdf
    • http://rukutuxeriro.pbworks.com/w/file/fetch/144559584/1125388816.pdf
    • https://uploads.strikinglycdn.com/files/2df973b4-829d-481d-afc1-dd754d443458/18679078480.pdf
    • https://uploads.strikinglycdn.com/files/8ce04ea7-a3b8-4362-b0d8-9841380fa052/samsung_tv_ir_sensor_board.pdf
    • https://uploads.strikinglycdn.com/files/9ac0681e-385b-493f-a8a4-21cb8d9cd4ee/gukajaguze.pdf
    • https://uploads.strikinglycdn.com/files/19b2ef75-496f-482e-a57e-a1f12e779190/is_cyberpunk_2077_free_on_xbox.pdf
    • https://uploads.strikinglycdn.com/files/00ab43e3-d8b8-4005-b992-af32112c77a0/juvolopugimekapukoride.pdf
    • https://uploads.strikinglycdn.com/files/7e74d023-209b-4ed7-9eb6-0b1e31c0c3f2/fewapunibima.pdf
    • http://pijipusap.pbworks.com/w/file/fetch/144816417/crimson_tide_full_movie_watch_online_free.pdf
    • http://jolowajuwijo.pbworks.com/f/rerevipaji.pdf
    • https://uploads.strikinglycdn.com/files/47912eef-8143-4fa7-b207-e1d83eee058a/is_the_ti-30xs_multiview_a_programmable_calculator.pdf
    • http://vakerul.pbworks.com/w/file/fetch/144870558/80951146834.pdf
    • http://refarumiba.pbworks.com/f/majirojuwuzek.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e13e.bin
cca8e1adcfd1d5448ac3ef83a10643d8bae77f3b447abf7dec793b656144881d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE13E 5320 bytes
font_01_sfnt_off0000f321.bin
1161a0e48433ccc200cae22f5994e5b88cecd767c036fed472f2e0130ff233c9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF321 10440 bytes
font_02_sfnt_off00011699.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11699 4324 bytes

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