Malicious PDF — malware analysis report

Static analysis result for SHA-256 6acccc995b015959…

MALICIOUS

PDF

73.4 KB Created: 2021-03-09 16:20:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: a05832189ed2fe70c9765553bb13c558 SHA-1: 7e0d50dd167fefcfb22d30ebba3bb7effe3d561f SHA-256: 6acccc995b01595956309686ae441c0ff3693eed2e55a6a90a16fc78d89f0a6d
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous embedded URLs, with a primary focus on 'https://xezojetit.ru/strik?utm_term=tokyo+ghoul+manga+box+set+uk', suggesting a lure to a malicious site. Heuristics indicate the PDF is a link farm on disposable hosting, and ClamAV detection confirms it as Pdf.Phishing.Trojan. The ML classifier also strongly flagged the PDF as malicious. Although no scripts were extracted, the structure and URL distribution point towards a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://xezojetit.ru/strik?utm_term=tokyo+ghoul+manga+box+set+uk PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4451350/normal_60225134c9560.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369920/normal_5ff0cac7863ea.pdfIn PDF document text
    • http://lisojuribopuwad.22web.org/92193876777.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456998/normal_5fcafccfe70c7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483349/normal_5fc7db3c9423b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kixelekiteduxaz.rf.gd/sasiruwusisorezajobopizir.pdfIn PDF document text
    • https://s3.amazonaws.com/wipotegadodorek/academic_ielts_reading_answer_sheet.pdfIn PDF document text
    • http://vimodamugirad.rf.gd/zojebatusobede.pdfIn PDF document text
    • http://wilurimidolajej.rf.gd/73304315448.pdfIn PDF document text
    • http://sovewegupafipiw.rf.gd/33194869317.pdfIn PDF document text
    • https://s3.amazonaws.com/kitakilesa/imb_piracy_report_2018.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8ba85ce-78a4-4072-88c0-77efb4dbecd9/how_much_does_a_nba_sports_agent_make.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1da95c0-5f14-48c2-a090-d49457e04e38/calculadora_casio_hr_100_rc_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/ximupuv/kakowubonuda.pdfIn PDF document text
    • http://momalovategur.rf.gd/15093982032.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/29af58a7-dd50-4bd4-85e4-066786582be0/questions_about_political_philosophy.pdfIn PDF document text
    • http://lamupilabixekuw.epizy.com/autel_maxisys_elite_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50bba394-6e39-4e65-b901-b3ab2c568889/western_snow_plow_parts_store_near_me.pdfIn PDF document text
    • http://vevisadoko.epizy.com/48564489416.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76a1e425-ff42-472e-8fec-925cc58cb23f/garukiveruzigipejuv.pdfIn PDF document text
    • https://s3.amazonaws.com/norozovijalu/teluvofitonatexosepizo.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_off0000e0b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0B2 5328 bytes
SHA-256: fb1a5d2e65a573f9345e786c7c30276bc265e91c30758fa9741fa7ad28f4c816
font_01_sfnt_off0000f2bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2BB 11156 bytes
SHA-256: 3cc02a4b687d841acf5b02d09acb2451fa560f36abd570ee27cb6e6b5dda5ade

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