Malicious PDF — malware analysis report

Static analysis result for SHA-256 428501531041ddb9…

MALICIOUS

PDF

83.1 KB Created: 2021-03-29 19:37:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 0c84f22213b8542d47dcc765aac88947 SHA-1: 2638d65d44158068ba2d09cefacd16eff7a3bf76 SHA-256: 428501531041ddb961a0eb4faa668b1c3ada35bddb2c6fed9fe46d0484db953c
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to disposable hosting or link farms, indicating a likely attempt to redirect users to malicious content. The document body, though heavily obfuscated, suggests a lure related to 'queen bohemian rhapsody guitar tab pdf', which is likely a deceptive pretext to drive traffic to these malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://golowaki.ru/award?keyword=queen+bohemian+rhapsody+guitar+tab+pdf PDF link annotation
    • http://segipaxi.iblogger.org/buwoxab.pdfIn PDF document text
    • https://kenuvibugitevam.weebly.com/uploads/1/3/4/7/134700053/5457971.pdfIn PDF document text
    • http://bebinovixox.iblogger.org/functional_analysis_elias_stein.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427267/normal_6001a104cfbb6.pdfIn PDF document text
    • https://rokumewa.weebly.com/uploads/1/3/4/5/134529377/kupeneforasulov_gopafiritaguwod_movakoruvumi_vijobadaji.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410986/normal_603b6823d9dce.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469355/normal_603f84bfa30c0.pdfIn PDF document text
    • https://muvusawit.weebly.com/uploads/1/3/5/3/135392745/6922530.pdfIn PDF document text
    • http://koponegigat.medianewsonline.com/72984054291.pdfIn PDF document text
    • https://kuserivexujeza.weebly.com/uploads/1/3/4/3/134331384/rumujunosu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jedikofip.rf.gd/free_wedding_stationery_templates_uk.pdfIn PDF document text
    • http://tigefaxoweta.rf.gd/cash_loan_agreement_form.pdfIn PDF document text
    • https://s3.amazonaws.com/dinilederu/kofirafakonoradivalar.pdfIn PDF document text
    • https://s3.amazonaws.com/babetafaperaxov/chronological_bible_app_esv.pdfIn PDF document text
    • http://gavawekib.myartsonline.com/barti_caste_validity_form.pdfIn PDF document text
    • http://bitinorakinin.epizy.com/33890850709.pdfIn PDF document text
    • http://sizamix.epizy.com/dumemezoziwo.pdfIn PDF document text
    • http://namepafubi.atwebpages.com/vokivogogo.pdfIn PDF document text
    • http://vimitafukufes.rf.gd/kipavomakigaxuvebo.pdfIn PDF document text
    • https://s3.amazonaws.com/sajezife/cox_cable_channel_guide_omaha_ne.pdfIn PDF document text
    • https://s3.amazonaws.com/wujapu/62027028984.pdfIn PDF document text
    • http://vimobuzu.epizy.com/80197803223.pdfIn PDF document text
    • http://wolobugoxew.myartsonline.com/reduce_file_size_below_80_kb_online.pdfIn PDF document text
    • http://tanikotik.epizy.com/89305975114.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_off000101e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101E5 5724 bytes
SHA-256: 67030aec78398316f229355714e623062458641797818ee7a80429610c867f62
font_01_sfnt_off00011530.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11530 12360 bytes
SHA-256: 7cdefdb0f8a186694f4ab0c7d2292b58a4b6658c14fc0f72544802d29ebc6f48

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