Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbb0bc817098ca15…

MALICIOUS

PDF

72.3 KB Created: 2021-03-24 11:40:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a332df13b448e023dc106ec95ab4ea91 SHA-1: 13b91168adbb9bf7268afcc20df0191620aa423f SHA-256: fbb0bc817098ca15a1c4a7d11c74026f27d509c9fee012731d33c0cf4e9503ca
156 Risk Score

Malware Insights

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

This PDF document was flagged by multiple heuristics and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of external links, suggesting a link farm or redirection mechanism. The document body is heavily obfuscated, but the presence of external URIs and the PDF_SEO_LINK_FARM heuristic indicate a likely attempt to drive traffic to malicious or deceptive content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://vilenefex.ru/wix?keyword=peria+chronicles+trailer
    • https://cdn.sqhk.co/nomavunut/2iidijc/best_deals_on_amazon_prime_day_2019_uk.pdf
    • https://cdn.sqhk.co/vesagivara/zllZJgi/runnings_austin_mn_jobs.pdf
    • https://zusajozaza.weebly.com/uploads/1/3/1/3/131381142/gagakejov.pdf
    • https://cdn.sqhk.co/zotenejek/hVghjhq/46686822883.pdf
    • http://app-3null.com/carotid_ultrasound_report_exampleq931i.pdf
    • http://vowujebotoza.mywebcommunity.org/alimentos_transgenicos_fao.pdf
    • https://cdn.sqhk.co/pememobuwir/iGynRyV/death_worm_movie_download.pdf
    • https://cdn.sqhk.co/pevejotomoma/mjeSIgh/78230452285.pdf
    • https://kepinofex.weebly.com/uploads/1/3/4/0/134017679/b8f2dd1.pdf
    • https://pisubemiduburor.weebly.com/uploads/1/3/1/3/131380627/fisegomoxut.pdf
    • https://cdn.sqhk.co/xedufoga/aYihugi/54776827628.pdf
    • http://bloodcraft.online/healthtap_24_7_telemedicine6ahq7.pdf
    • https://cdn.sqhk.co/feluxolid/gjiijgd/retract_battle_royale_android.pdf
    • https://bewotababuruga.weebly.com/uploads/1/3/1/1/131163836/dapixolef.pdf
    • https://cdn.sqhk.co/jizapamilizo/ujbtpo9/fishing_hooks_for_sale_near_me.pdf
    • https://wopewajut.weebly.com/uploads/1/3/4/6/134664352/1903410.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://guseboses.atwebpages.com/epson_wf_2630_ink_not_working.pdf
    • https://6648aa49-deb3-4d6f-81a8-a63cc7a297fb.filesusr.com/ugd/38eac1_bb21290cb09840d0a5eebbca5df6cef3.pdf?index=true
    • https://b3d988c2-7a7d-4c3c-9141-221b6550481e.filesusr.com/ugd/9dda13_4b0fa7f17abc40e4baab6c1fb91a9128.pdf?index=true
    • http://xekabotiwuker.atwebpages.com/losulabivubawajetukilobe.pdf
    • https://6d23287f-a15b-43b7-8d69-700c0e01f504.filesusr.com/ugd/185c00_d562afdaa6064e42b2ea38bb99b08dde.pdf?index=true
    • https://459ec6dd-5b69-4322-a182-74abbfaa0e48.filesusr.com/ugd/221eaa_0ec435cb64be4aa7818f4ac75f7d9772.pdf?index=true
    • https://1682489e-d94b-4f22-b6a6-c8ecb623ca2e.filesusr.com/ugd/5f226e_c2c2974de42248edab867e3bad593b95.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_off0000de5d.bin
fa46e70caa550dc4f60643442741a7f3d97f1b4f53130e1ba6c62527b3795c04		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDE5D 4888 bytes
font_01_sfnt_off0000eef1.bin
5d737e917972adcdb8e4069cbdd08051a8804bb1fe4e501342f72cb7c35ea316		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEEF1 10824 bytes

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