Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c8caf07f0cde4a4…

MALICIOUS

PDF

98.3 KB Created: 2021-03-30 23:03:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 03076cae05b80d730b9b563f91c45ff1 SHA-1: c885c0008286d454b22963017fd5420594690739 SHA-256: 0c8caf07f0cde4a40061d0688510bbfdfa63df89dfd1ef6849ec4411352c75e5
126 Risk Score

Malware Insights

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

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

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://botokaw.ru/123?utm_term=angularjs+bootstrap+template+example PDF link annotation
    • http://ampinternational.org/bedwars_texture_pack_1._8hdt40.pdfIn PDF document text
    • http://walolexokesufa.sportsontheweb.net/tipos_de_anemia_en_animales.pdfIn PDF document text
    • http://sks-expertiza.ru/zugivevirekemokunipitoa0xvo.pdfIn PDF document text
    • http://umniashka.ru/great_is_thy_faithfulness_instrumental7zcyr.pdfIn PDF document text
    • http://copyrightprivacy.site/how_to_say_new_beginning_in_hebrewb4251.pdfIn PDF document text
    • http://worozoxiw.sportsontheweb.net/gafuwuladowimizezavadevab.pdfIn PDF document text
    • http://mx50off.info/goredemuitd9m.pdfIn PDF document text
    • http://derilezin.sportsontheweb.net/nododowoxakozasilumus.pdfIn PDF document text
    • http://dunizajo.66ghz.com/asio4all_fl_studio_12.pdfIn PDF document text
    • http://yewes.fun/aluminium_sheet_gate_design498re.pdfIn PDF document text
    • http://nosinoski.shop/sofewumezagadelipijugs08g.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://0443db59-9f9d-4031-b786-8a5723798135.filesusr.com/ugd/ab62d6_07d4e4d0b50c48ea9e4aad570b5d602b.pdf?index=trueIn PDF document text
    • https://ef733714-782c-48ea-8991-1bc0bf0c95f2.filesusr.com/ugd/ad2ade_d5f32a5f9c744b119555449fd9f9a93b.pdf?index=trueIn PDF document text
    • https://4f0754e2-f0c4-47db-826b-83042027646c.filesusr.com/ugd/7a11b0_1d422ac071114f6ab68bd46b6fed2dab.pdf?index=trueIn PDF document text
    • https://2a983b51-2e13-4971-8c1f-a5bca3ab4353.filesusr.com/ugd/e1a791_bdf62590208743c2bd5ebdc06797154a.pdf?index=trueIn PDF document text
    • http://pajipiruk.rf.gd/balefunibokaromabawufaze.pdfIn PDF document text
    • http://jababonulet.epizy.com/17535011427.pdfIn PDF document text
    • https://s3.amazonaws.com/fogibi/lg_tromm_washer_wm2277hw_manual.pdfIn PDF document text
    • http://femejedad.epizy.com/sosejikujijonuf.pdfIn PDF document text
    • http://lipabarud.atwebpages.com/hot_beverages_recipes.pdfIn PDF document text
    • https://s3.amazonaws.com/pisedij/chemistry_notes_class_12.pdfIn PDF document text
    • https://s3.amazonaws.com/tokudapele/lozotogum.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014072.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14072 5412 bytes
SHA-256: 1fc5c44970385a4a392ab631d8b708fc41d73cb3b945e5cee97734162bd058a3
font_01_sfnt_off000152d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x152D0 11932 bytes
SHA-256: 38bfac1dd03f2e08265d6ed642fff2593094f7d6797175e5b73346a3abd8a019

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