Malicious PDF — malware analysis report

Static analysis result for SHA-256 4197aecce091c2e0…

MALICIOUS

PDF

78.2 KB Created: 2021-05-07 10:42:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 71b967a6c438a5d4622bda518a5bcee8 SHA-1: d2a7875decfc047b486e23e4bcfb6b609a8a928d SHA-256: 4197aecce091c2e086d9a9815c982e75b6d19f44efe4a02aaf9cd2ac50b9db56
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file is identified as malicious by ML classifiers and ClamAV, with multiple heuristics indicating it's a link farm on disposable hosting. The embedded URLs, such as https://botokaw.ru/strik and http://sisogelodaze.medianewsonline.com/wezam.pdf, point to phishing or scam-related content. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the overall structure and URL analysis strongly suggest a phishing attack.

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://botokaw.ru/strik?utm_term=what+are+the+runes+in+minecraft+dungeons PDF link annotation
    • http://sisogelodaze.medianewsonline.com/wezam.pdfIn PDF document text
    • http://zadujujokivat.iblogger.org/autocad_basic_tutorial_free_download.pdfIn PDF document text
    • http://lnstagram-helps-contact.com/16311677922bh0a7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494866/normal_5fcda66fa7ce2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379615/normal_5fdfa3eb461a2.pdfIn PDF document text
    • http://nedavupagisezim.mygamesonline.org/zogovobadikonurupebijoxe.pdfIn PDF document text
    • http://instapriz.site/574491268337g49m.pdfIn PDF document text
    • http://wilexani.22web.org/filmywap_2005_bollywood_movies.pdfIn PDF document text
    • http://dusibarupuguli.medianewsonline.com/46204099094.pdfIn PDF document text
    • http://hookup753.fun/is_my_partner_allowed_to_stay_over_covid9hurv.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475872/normal_5fcecd3560262.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393626/normal_60467687d74a6.pdfIn PDF document text
    • http://chisto-chisto52.ru/998930625947bq1b.pdfIn PDF document text
    • http://alexandreablog.com/grade_10_math_slope_worksheetsnbfcf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://c11ab09e-384c-4904-8c79-5ef6f38008df.filesusr.com/ugd/7131a6_d0f0b04d44c94387993a7b207e8f7d7d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wajibile/vesigikemozizadigi.pdfIn PDF document text
    • https://0e627107-309b-4451-a84d-e7064c41fccd.filesusr.com/ugd/04c368_54c309501b2a4f9a9fac843ddc6e5eb3.pdf?index=trueIn PDF document text
    • http://vameberimonon.onlinewebshop.net/60811373029.pdfIn PDF document text
    • https://78905da9-dd21-4190-abaa-c894c042e703.filesusr.com/ugd/851c7c_cef5c6cd07a64afc83b2d217f2187318.pdf?index=trueIn PDF document text
    • https://0e098354-e5d1-4afc-9be7-763a70ae5e44.filesusr.com/ugd/ef253e_0eed04893b1849f6b5bd6fae4a591215.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zatazewoz/53302952485.pdfIn PDF document text
    • https://b962d5b8-8819-42e3-9ba3-d95e8366760e.filesusr.com/ugd/f51585_b015b86367574fbcac6c3cbff8f1b4f3.pdf?index=trueIn 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_off0000f27d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF27D 5416 bytes
SHA-256: 8ce9d0e05d4a32cca10890b8a60ccdcc635a51843be699dc6cd03ce70cbc614b
font_01_sfnt_off000104ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104CE 11104 bytes
SHA-256: c29b1f59fc60a098bd225638b6a6742ebabc723acc23a4e27ea929b871649d85

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