Malicious PDF — malware analysis report

Static analysis result for SHA-256 05d362f4542ca901…

MALICIOUS

PDF

78.4 KB Created: 2021-03-21 07:40:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c7c47cf69b9e084d18c72c1e445640e4 SHA-1: 48d0904559c3c7955648d4064a73c009922ef5a1 SHA-256: 05d362f4542ca9016614040a66ef6b5236662530b8e2444982e331616479c336
126 Risk Score

Malware Insights

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

The PDF document contains multiple external URLs, with one specifically linked to 'ahuyentar cucarachas de forma natural' (natural cockroach repellent), suggesting a lure. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using disposable hosting for such links. ClamAV detection and ML classification confirm the malicious nature, likely involving a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://lozipotod.ru/123?utm_term=ahuyentar+cucarachas+de+forma+natural
    • http://detonic-ro.website/dls_19_mod_profile_daton13m.pdf
    • https://finedogu.weebly.com/uploads/1/3/4/7/134749629/fijaxewunogid-liginun-bolipudosun-gibokuro.pdf
    • http://gutowofobujibos.iblogger.org/how_much_does_usps_charge_per_pound.pdf
    • https://zaxixeresez.weebly.com/uploads/1/3/1/8/131871416/sekurifeweg.pdf
    • http://antonioit.space/snow_bros_video_game_apk_download6e3ua.pdf
    • http://electorat.org/presto_electric_skillet_12-inchvr1b5.pdf
    • https://juxibawazorar.weebly.com/uploads/1/3/3/9/133997202/2691081.pdf
    • https://topudikuwem.weebly.com/uploads/1/3/4/0/134042537/xunusosot_tagik.pdf
    • http://hurricane1.space/bovufunidanemuzipabitekass66af.pdf
    • https://vaxulazazoju.weebly.com/uploads/1/3/4/5/134587837/viguju.pdf
    • https://sisufowikukutu.weebly.com/uploads/1/3/4/3/134311685/vuxugi.pdf
    • https://vumifedesonuzik.weebly.com/uploads/1/3/4/8/134849268/7727045.pdf
    • http://lotto-investclub.com/vesibalizawapugakasas1due2.pdf
    • http://tonagruz.ru/duvet_cover_sheet_definitionezfbg.pdf
    • https://rovibabewovel.weebly.com/uploads/1/3/4/8/134884015/kizor.pdf
    • http://copyrightsupporteds.com/lasufipiramukutkyap.pdf
    • http://copyrightnotice-ig.com/815219148596wtsg.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://gijomifede.rf.gd/nostalgia_sheet_music_piano.pdf
    • https://s3.amazonaws.com/paropabaru/16655709472.pdf
    • http://zubugawopi.rf.gd/laxofifenek.pdf
    • https://s3.amazonaws.com/makumapikeze/zuvutekofavudafijel.pdf
    • https://s3.amazonaws.com/towakog/14092390309.pdf
    • http://sejabozewilobog.epizy.com/vekosunelewoji.pdf
    • http://zugoxovok.epizy.com/rebekifefamelog.pdf
    • https://s3.amazonaws.com/xakusineba/sevelax.pdf
    • https://s3.amazonaws.com/levumoduf/can_you_learn_to_fly_in_the_navy.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f4a1.bin
a3d0ea2f88a92436ace02fe934a930779e625055b257ed1746fb54b0e5a54b8f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF4A1 5352 bytes
font_01_sfnt_off000106b2.bin
4dfe5c00f4b26685e7b22f3bf4941306d08d8df42f46a848a1b252a1d6e0a5fa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x106B2 11548 bytes

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