Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b62feeb66b2bb93…

MALICIOUS

PDF

76.7 KB Created: 2021-03-26 12:07:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e7a0150de9f0b7e112e14bfcf87f6446 SHA-1: b6c85207d35c2873eefc36a610bf7daf646aa830 SHA-256: 4b62feeb66b2bb9333a21f870a4491920d83f4e943ef9d73126830b4e8ed654d
156 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. The PDF contains a large number of external links, suggesting a link farm or phishing attempt, with one URL specifically pointing to 'lozipotod.ru'. Although no scripts were explicitly extracted, the PDF structure and the presence of numerous external URIs strongly suggest it's designed to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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://lozipotod.ru/award?keyword=pregnancy+development+pdf
    • https://cdn.sqhk.co/zebenane/hMjejgM/pofukofuxasol.pdf
    • https://dotozirijekuzo.weebly.com/uploads/1/3/4/3/134315872/bopiwumumasu.pdf
    • https://pedesidava.weebly.com/uploads/1/3/4/3/134355179/c728bf1404bb27d.pdf
    • https://lawukexudemodu.weebly.com/uploads/1/3/4/0/134041757/370171943c4.pdf
    • https://pituxujufu.weebly.com/uploads/1/3/1/8/131856071/7165794.pdf
    • https://cdn.sqhk.co/seworani/gc1gel6/dark_knight_dummo_lyric_video.pdf
    • https://givexikiduxa.weebly.com/uploads/1/3/1/3/131398224/8a53b228ca.pdf
    • http://saduzemed.mypressonline.com/autocad_commands_in_urdu.pdf
    • http://bibopasaxuvibu.mypressonline.com/zodiranukif.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://7afcd0b8-98df-42a4-afe0-9544d44c9539.filesusr.com/ugd/74e9cf_179de7fa09bb4560ad70b69cf89d2986.pdf?index=true
    • https://87b84290-c0b3-4c73-97a1-3d59c64c3f69.filesusr.com/ugd/c638b7_508dfb424a80444e9cb2ac0856b1f3ac.pdf?index=true
    • http://fanalejowegop.atwebpages.com/last_of_the_mohicans_theme_song_youtube.pdf
    • https://3ff4c494-4984-418a-b709-7a5c611cca0a.filesusr.com/ugd/adbee0_31557e1a4d5249cf9df0a7f54806f17c.pdf?index=true
    • https://332892e0-6a2b-40ad-946e-e7c92c61c867.filesusr.com/ugd/3e5d97_6c7347ad2d7b47f683b2fcc120ec4f09.pdf?index=true
    • http://xakazasaravi.onlinewebshop.net/70612205290.pdf
    • https://4eff3ec4-d147-45d1-be73-876d9e1d0019.filesusr.com/ugd/efb3f0_63f474b0666e437c9e74f240b1f7053d.pdf?index=true
    • https://uploads.strikinglycdn.com/files/93d3b4a1-6a11-4189-8795-f69d056f2bc8/who_did_progressives_believe_should_fix_social_problems.pdf
    • https://uploads.strikinglycdn.com/files/15a3a029-af46-4b87-86e8-e2ed646d0251/que_es_titulo_rosa.pdf
    • http://medazupu.onlinewebshop.net/22278472508.pdf
    • https://7e073981-ad1c-4081-8dc0-76946ba36063.filesusr.com/ugd/c4f63d_279c540b1f214469beadbcc069257b2a.pdf?index=true
    • https://ea64ff4c-51e6-4efc-8cc1-399682447901.filesusr.com/ugd/961f18_4f49174009354e8c89212bcd76afe480.pdf?index=true
    • 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eda1.bin
a50125fadc4971946730b8c0f74ac2c69d766e3ce5eef42a2c4d3c5d536b8229		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEDA1 5460 bytes
font_01_sfnt_off00010032.bin
53fbdc5db63752efd2e850658f54029bdb996def824ed22a2c24db3c7129d694		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10032 10808 bytes

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