Malicious PDF — malware analysis report

Static analysis result for SHA-256 17433d010904dc95…

MALICIOUS

PDF

78.0 KB Created: 2021-03-10 10:19:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 691743c4e863db9085f1c03c633fbc29 SHA-1: 0fc57bf9ad9230c48a212b52e398fe8a1cd0e16c SHA-256: 17433d010904dc95a2a37d4f93d625644c88f5466f252e7cb89513b557a75785
186 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, indicating it is likely part of a link farm designed for SEO manipulation or to redirect users to malicious sites. The ClamAV detection and ML classifier strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a phishing or redirection attack, potentially leveraging embedded JavaScript for obfuscation or further redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 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.
  • 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/wix?keyword=eddie+huang+fresh+off+the+boat+book+pdf PDF link annotation
    • http://dapurixid.sportsontheweb.net/rufelorovazutigatav.pdfIn PDF document text
    • https://wirevoge.weebly.com/uploads/1/3/1/8/131856771/fb387a2d0.pdfIn PDF document text
    • https://bivibonade.weebly.com/uploads/1/3/4/0/134041173/c93d516c6162.pdfIn PDF document text
    • https://toginomaba.weebly.com/uploads/1/3/4/0/134042469/zelimulitiwuser.pdfIn PDF document text
    • https://sojuseruk.weebly.com/uploads/1/3/4/3/134367588/zedotora-poxapepovefiru-zivasafifux.pdfIn PDF document text
    • http://fajiriduxir.medianewsonline.com/xokowa.pdfIn PDF document text
    • https://jubekufolofifi.weebly.com/uploads/1/3/4/5/134593927/jukotusolosa_fotaxufiri_nuzodaletakeji_susolavubaj.pdfIn PDF document text
    • http://jenuxijaf.mygamesonline.org/how_to_lose_weight_eating_3000_calories_a_day.pdfIn PDF document text
    • https://xijeruwenuvu.weebly.com/uploads/1/3/4/0/134018409/jixize-bosexezasabevop-kenugud.pdfIn PDF document text
    • https://zodazapel.weebly.com/uploads/1/3/4/5/134511258/256037.pdfIn PDF document text
    • https://guduzuzej.weebly.com/uploads/1/3/1/6/131606672/wiwibogosug.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zozofufulolig/ctet_2019_paper_1_syllabus.pdfIn PDF document text
    • http://muwuvago.atwebpages.com/boveduraxorunefalal.pdfIn PDF document text
    • http://xiwozoget.atwebpages.com/the_christmas_carol_jim_carrey_cast.pdfIn PDF document text
    • https://s3.amazonaws.com/wifiduxezo/hyponatremia_guidelines_2017.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ad5f25e-967e-4342-a30d-4e0cfd983423/dewalt_3400_psi_pressure_washer_parts_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51d76ceb-507c-4b95-b941-1baa5bc8421e/88270043877.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f92d318-5a06-40f4-a766-8a1eeb92e21e/how_to_make_black_and_decker_mini_fridge_colder.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/589e9f7b-3eaf-4a62-b589-db92d6bb395d/5872906632.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
font_00_sfnt_off0000e8f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8F1 3328 bytes
SHA-256: c307db823a53bb43b9025ebbf733add907c34bfcedc7838a977a1904c6ceea29
font_01_sfnt_off0000f4e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4E3 5432 bytes
SHA-256: 09957a522d643bbddaf69c45d0cd30c288d7d2cbd19d45b51b3802fdade88b7e
font_02_sfnt_off0001075e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1075E 10240 bytes
SHA-256: aba8254dd1832140dc6a8a867faf78050c40c9d8c502d7f7b82a1dad94e3ace8