Malicious PDF — malware analysis report

Static analysis result for SHA-256 e22239119bab7f72…

MALICIOUS

PDF

79.7 KB Created: 2021-03-07 09:58:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b11bb0bf81060264cb6a2e58cd4dcba5 SHA-1: d10ae20102df28e75555376d6d4e9a5cec18a90f SHA-256: e22239119bab7f7209711bdcf081ed9da59624417e09d54f34682c0d12283e41
156 Risk Score

Malware Insights

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

This PDF document contains numerous external links, a common tactic for phishing or ad-fraud schemes. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as a phishing trojan. While no scripts were directly extracted, the PDF structure itself facilitates the redirection to malicious URLs, likely as part of a spearphishing attachment campaign.

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-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://nipisod.ru/aws?utm_term=toro+524+snowblower+oil+capacity
    • https://vokubopupabilu.weebly.com/uploads/1/3/4/6/134691430/xajokemifuwaki.pdf
    • https://marepevu.weebly.com/uploads/1/3/4/3/134309524/1372078.pdf
    • http://sibepizibatiza.iblogger.org/fixed_fairy_tales_definition.pdf
    • https://nakalefa.weebly.com/uploads/1/3/4/5/134522788/gutoxufogukokufusif.pdf
    • https://jupavovol.weebly.com/uploads/1/3/4/3/134314217/4b7df7.pdf
    • https://pitefomut.weebly.com/uploads/1/3/2/6/132682610/61c9f2e420fe275.pdf
    • http://melidagerukebel.sportsontheweb.net/the_5_minute_journal_barnes_and_noble.pdf
    • http://magawiwove.22web.org/38853367456.pdf
    • https://cdn.sqhk.co/wusoxopejezo/uwhajja/ghosts_of_mars_online_movie.pdf
    • https://cdn.sqhk.co/gixenako/hacjdIi/90_s_dance_music_hits_mp3.pdf
    • https://cdn.sqhk.co/pojimisuso/ijIz4gh/world_war_ii_history_channel_videos.pdf
    • https://wubenigulusetib.weebly.com/uploads/1/3/4/7/134712949/1257957.pdf
    • https://cdn.sqhk.co/nedupugifuka/hdPUdhh/lep_s_world_3_online_games.pdf
    • https://kibugisire.weebly.com/uploads/1/3/4/0/134018652/84f151a89d11.pdf
    • http://kejoxemubogese.mywebcommunity.org/wulorofinuvezununibi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://ddf64d59-5240-4154-9987-17dfc28e22c7.filesusr.com/ugd/cec570_533aaf0ba7f846308c07ff84aa34c309.pdf?index=true
    • http://tijopuzotozume.rf.gd/formato_para_apertura_de_cuenta_de_detracciones.pdf
    • https://1b15a19f-c8c2-4d9d-8c2f-e97aa7ecfe2c.filesusr.com/ugd/eb6c48_e15d427dd3984938a8ed7fbdeaa4f766.pdf?index=true
    • https://52ed6390-a5c1-4502-9f93-599cf6d98ad1.filesusr.com/ugd/f7fbc8_676cc96415704d8986097b7b90d67b95.pdf?index=true
    • https://3b87a2b8-2d13-4e6d-acc4-cbba57692a59.filesusr.com/ugd/50988c_5f64946d80284fe498c0acfcf7336273.pdf?index=true
    • http://pejijolefisawiw.epizy.com/61559736869.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_off0000ee2e.bin
c3cab3e17bb589143ef1cea2b6310182f0aead865a9ff8966055e85a6738e5bd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEE2E 5344 bytes
font_01_sfnt_off0001007e.bin
a548a7e43cec5f40d76757ba5be08f72aed266f51929ab7e3c357682452fb63e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1007E 10148 bytes
font_02_sfnt_off00012344.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12344 4324 bytes

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