Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0b3c05514087761…

MALICIOUS

PDF

82.4 KB Created: 2021-03-27 11:47:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 60f773c39d39c03d3c330f5230849c81 SHA-1: 12bdbe9b4e8f36893b5667d93726e1e34bfcabd7 SHA-256: e0b3c05514087761ef7bfaeed15458aa276a4f9406dd5df2df073b040352b214
126 Risk Score

Malware Insights

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

The sample was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external URLs, with one identified as a link farm on disposable hosting, suggesting an attempt to manipulate search results or redirect users to malicious content. While no scripts were explicitly extracted, the PDF structure and embedded URLs indicate a phishing or redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://dugedepap.ru/award?keyword=introduccion+al+budismo+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4414332/normal_600ca0219035e.pdfIn PDF document text
    • https://cdn.sqhk.co/dimumaneda/cyygf8Q/milkshake_recipe_vanilla_easy.pdfIn PDF document text
    • https://cdn.sqhk.co/tatiderubota/rigPNie/arabic_mehndi_pics.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381082/normal_5ffddf45cdf51.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501810/normal_6027ee6e676b3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456389/normal_5fdb702cd12b8.pdfIn PDF document text
    • http://wifonivibigi.22web.org/mexevipewa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368782/normal_603ce712a5a00.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://guwajogijifode.rf.gd/25358726713.pdfIn PDF document text
    • http://muzezep.epizy.com/88399568142.pdfIn PDF document text
    • https://s3.amazonaws.com/muxegeza/magic_bullet_kitchen_express_recipes.pdfIn PDF document text
    • https://s3.amazonaws.com/fosagobomap/coulombic_attraction_worksheet.pdfIn PDF document text
    • https://f579be4a-c2ec-451d-94ee-532237c06880.filesusr.com/ugd/9f6a24_1f66042664d0407db6e410c80c2e7835.pdf?index=trueIn PDF document text
    • http://tonataf.epizy.com/86035511551.pdfIn PDF document text
    • https://b32521b7-32ca-447e-9967-d27d0dce683d.filesusr.com/ugd/800b88_0e009110bd8941ca9e7df4f0941fd46c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fogibi/komimaroromemilizun.pdfIn PDF document text
    • https://c03439ef-6557-4199-865e-586791a52b6c.filesusr.com/ugd/6bb4a2_f61880c06773418caafad4d47245a9f1.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kakekojezutok/56252142192.pdfIn PDF document text
    • https://7a1f2a0d-094a-4466-88af-72a4af93b9fa.filesusr.com/ugd/22739b_a9735667ee054ca18a24ef0ee9b82160.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_off00010535.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10535 5380 bytes
SHA-256: 0e95dd905fc0e768f9fce4fb9d2eab6c912898a345ad965e2638172d49137fc4
font_01_sfnt_off0001175d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1175D 11780 bytes
SHA-256: 68609b48a079d7eb35d3c29e7a8c8311b93a647a2bfc5ec1d457cebbe44013e9

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