Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e4859f74d035628…

MALICIOUS

PDF

80.8 KB Created: 2021-04-03 16:54:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9eeab5fd0edfbf57cb5675647ad844f3 SHA-1: 64e7808693fa14b75454372b572d50f71d73436d SHA-256: 1e4859f74d035628d7dbf32739a6e15027846fd393ccb58477c27b0173b3a424
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a common tactic for phishing or directing users to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as a phishing trojan. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic suggest the document is designed to distribute a large number of links, likely for a scam or to host further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://zajinet.ru/123?utm_term=nationwide+pet+claim+form+email
    • http://tramlaweq.online/how_to_play_tabletop_rpg_onlineqcbbn.pdf
    • http://optalpha.com/zegikebigoveshl2od.pdf
    • http://zoneeuro.pro/how_to_run_channel_auto_scan_on_supersonic_tvn7ewk.pdf
    • https://movediwifed.weebly.com/uploads/1/3/2/6/132695881/xoketalopef-dubebineginirev-begokivepa.pdf
    • http://nefritthebestthing.site/jotatibuxub7utsq.pdf
    • http://datingdate.site/java_jdk_32_bit_windows_8._1q9gep.pdf
    • https://cdn.sqhk.co/dopuwene/ieggjiB/guluxorumesibokuw.pdf
    • https://lubozukutiximik.weebly.com/uploads/1/3/4/4/134472848/eaab843d3.pdf
    • http://helpforteam.com/tv_cartoon_characters_60_s_70_sydleg.pdf
    • https://baziwiruxufuwav.weebly.com/uploads/1/3/1/4/131482892/jovumoraz_sagitixi_xosigopo.pdf
    • https://cdn.sqhk.co/xiponamoribo/heuN0ha/10626232797.pdf
    • http://f1l3download.site/python_iterate_dictionary_in_order_of_insertion3qxfs.pdf
    • http://iclod.tech/black_background_imagehewse.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://b6086c54-8ef4-40f3-ba18-bbbb993b339e.filesusr.com/ugd/36e927_cd2b78151a1a4d2cadfdcc141b852e95.pdf?index=true
    • https://e5058785-d3d1-442e-b0ad-d0045053dde7.filesusr.com/ugd/17c622_6e22d26a81b14280950ca463b2073493.pdf?index=true
    • https://b4095e1f-5e43-4c35-8b28-ff0c3185c247.filesusr.com/ugd/9cc3de_c7712363efbe4f319c844a901aa76dc5.pdf?index=true
    • https://113c517c-d7b0-4b36-99d7-6722bcb7ef36.filesusr.com/ugd/8e66a5_e5f8f91b31bf469e93d130b6a7c29d7e.pdf?index=true
    • https://4647adb0-9c01-46a1-aef1-4380d5873f13.filesusr.com/ugd/edb4a7_de8ec2a307ca4ea8848574ccb663746c.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_off0000ff71.bin
cae4307213cb947a8fc75bb8cde76e642e2e1d6b67efb17e8dbf68fbcbfc4970		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFF71 5184 bytes
font_01_sfnt_off0001111b.bin
5341a91e552e09c66917d211cac9bee0085205b69f859e689027cded706ac1cf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1111B 10776 bytes

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