Malicious PDF — malware analysis report

Static analysis result for SHA-256 43a5eea7816acd25…

MALICIOUS

PDF

61.3 KB Created: 2021-03-09 22:19:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4a37269c09c620fa802a1a6aa5a34d87 SHA-1: 050b4a7b1213eebfc1b27a9705d21a1f67e40e95 SHA-256: 43a5eea7816acd25e1982ce346b9e4c74abc70724036e02484680ae7e42cb409
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF is identified as malicious by multiple heuristics and ClamAV, indicating it's a phishing or malware delivery attempt. The 'PDF_IMAGE_LURE' heuristic suggests it's an image-based document designed to trick users into clicking an external link, likely for a phishing scam or to download a second-stage payload. The presence of numerous external links, including one to 'gimoguvi.ru', reinforces this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8781

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 61 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://gimoguvi.ru/award?keyword=bsc+horticulture+syllabus+pdf+2020
    • https://cdn.sqhk.co/xajamenujo/jgghiNf/taloragixevi.pdf
    • http://frukt.space/what_is_kernel_in_os_and_its_types0vg4o.pdf
    • http://tonedomopoja.scienceontheweb.net/how_to_set_up_answering_machine_on_panasonic_cordless_phone.pdf
    • https://cdn.sqhk.co/tatonabufule/vjdhcd7/87361914112.pdf
    • https://cdn.sqhk.co/bogulevim/7jf5shT/40692416164.pdf
    • http://tortomsk.ru/880090357794bkw3.pdf
    • http://ropisunofo.mygamesonline.org/lewis_structure_practice_worksheet_answer_key.pdf
    • http://indital.fun/526688784749p1r8.pdf
    • https://s3.amazonaws.com/fixararololu/trane_xl90_tux_manual.pdf
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    • https://1a2149e7-ca7f-4e7c-a584-0e483de6f3af.filesusr.com/ugd/9219f8_e6a61a693f2b4c2ba7786484e1046f8a.pdf?index=true
    • https://0e67983c-e844-40c9-b604-97311ec94efe.filesusr.com/ugd/6e13d9_b8bb5802346d40439793ca97edcd4e1e.pdf?index=true
    • https://s3.amazonaws.com/wuwabobujasivor/companions_on_the_journey_piano_sheet_music.pdf
    • https://1a2149e7-ca7f-4e7c-a584-0e483de6f3af.filesusr.com/ugd/9219f8_a192e49fa10042ba97cbfad6a8b15078.pdf?index=true
    • https://s3.amazonaws.com/bisegilupuf/twitter_lite_apk_new_version.pdf
    • https://5a4e7950-e122-4b3c-9cf7-894e7f5b1216.filesusr.com/ugd/76aeb6_b484965f6ab844d4891a39f857124b20.pdf?index=true
    • https://s3.amazonaws.com/litunux/messenger_app_apk_2017.pdf
    • https://s3.amazonaws.com/xukirizugukugi/89855424838.pdf
    • https://9cf93ecd-64ee-4ad6-afcc-f350577a7522.filesusr.com/ugd/c4dbd3_46300208896046a88619a096f6fadd52.pdf?index=true

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