Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e43ffe826ad110b…

MALICIOUS

PDF

171.1 KB Created: 2021-03-04 22:20:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 7d7a3a987fa6914963fd0958b0659803 SHA-1: 806110e7647c31d03e546ef673a771944c515f2d SHA-256: 8e43ffe826ad110b2a378fb9fbe21612c43aa01b9393803b1ab15344bf58e9a8
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable or suspicious domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of an attempt to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://kuzutuzo.ru/wix?keyword=demi-gods+and+semi-devils+2013 PDF link annotation
    • http://fitoxis.22web.org/76727837381.pdfIn PDF document text
    • http://xezixaz.getenjoyment.net/american_gods_season_3_episode_4_air_date.pdfIn PDF document text
    • http://namafafiteg.mypressonline.com/is_it_illegal_to_wear_military_rank_insignia.pdfIn PDF document text
    • http://aycotoro5.xyz/mini_dv_tape_camcorder_to_buypwch8.pdfIn PDF document text
    • http://reactivaperu-viabcpi.com/tekunudofojimewevewegjjysp.pdfIn PDF document text
    • http://ygrash.website/sat_practice_test_2_khan_academyay0ix.pdfIn PDF document text
    • http://stav-games.ru/hd_streamz_apk_latest_versionrbw2g.pdfIn PDF document text
    • http://temppicture.xyz/collar_x_malice_unlimited_adonis_guidegloc4.pdfIn PDF document text
    • http://safijejog.mygamesonline.org/xadabomabajakoborowanupe.pdfIn PDF document text
    • http://migerov.xyz/dojitedikopmfpm3.pdfIn PDF document text
    • http://losinglotterynumbers.com/denodizowuvopurureveu83nd.pdfIn PDF document text
    • http://help-bluebadgecenter.com/zuruvejupagagb2vhz.pdfIn PDF document text
    • http://mufutekuson.getenjoyment.net/why_is_my_kenmore_ice_maker_freezing_up.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zotebizitiwiwe.epizy.com/recent_ielts_writing_topics_academic_with_answers.pdfIn PDF document text
    • http://kajoxuf.epizy.com/canadian_dementia_guidelines.pdfIn PDF document text
    • http://mebexadesojixip.rf.gd/matlab_music_beamforming.pdfIn PDF document text
    • http://lutatiduz.epizy.com/pumavenuxuxomelagufur.pdfIn PDF document text
    • http://kelelonuw.epizy.com/wigavomusexevibol.pdfIn PDF document text
    • http://wowutuzineko.myartsonline.com/cen-tech_3_in_1_portable_power_pack_troubleshooting.pdfIn PDF document text
    • http://liroporuki.myartsonline.com/ropuxipepudurikuvimiwinom.pdfIn PDF document text
    • http://jejotatimub.rf.gd/52930839134.pdfIn PDF document text
    • http://nejimafalun.onlinewebshop.net/is_acne_sign_of_hiv.pdfIn PDF document text
    • http://rojanesifilagu.myartsonline.com/widafefojugukafuxotekuziv.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00020569.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x20569 31516 bytes
SHA-256: f41b95c54567cf602851c25cc766473590e4f3ea06cd26377da0e634bbb76217
font_01_sfnt_off00026565.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x26565 5632 bytes
SHA-256: ba13bc0a6ac492d0e091adefb91d9fd230734563eba25596bcdd23865dff7ac4
font_02_sfnt_off00027899.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x27899 11036 bytes
SHA-256: 81f598a8f65bc40432ec1c55d7d42e108ef15c8fd8995c25f1e642ac6f2b9abb

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