Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd124b75be732963…

MALICIOUS

PDF

65.7 KB Created: 2021-04-02 14:02:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: a4e971f041c1870f7b331cb58e5f4dc4 SHA-1: 59640fe0948a890b3fca5a481c07dd409443858a SHA-256: bd124b75be7329638c732c29e9e1852622b16740dd5d5c95308a1f354137a2f8
156 Risk Score

Malware Insights

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

The PDF contains a lure for a "Gta v money generator no verification" and numerous external links, many of which are part of a link farm. ClamAV detected this as Pdf.Phishing.Trojan, and ML classifiers also flagged it as malicious. The presence of embedded URLs and the link farm structure suggest an attempt to drive traffic to malicious or scam websites.

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 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.
  • 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://jottigo.ru/wix?keyword=gta+v+money+generator+no+verification PDF link annotation
    • http://gozuwifaw.iblogger.org/differential_algebraic_equation.pdfIn PDF document text
    • http://xuputunoxukir.22web.org/kigudijup.pdfIn PDF document text
    • https://cdn.sqhk.co/riwifesineji/Gjfeigf/77912392663.pdfIn PDF document text
    • https://cdn.sqhk.co/kewawukufiju/RjhPgcA/raguvotewutojesaxo.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/sorapobuk/senadamubizizek.pdfIn PDF document text
    • https://43a2ba88-5de9-465b-b95f-6a4d82f2d06e.filesusr.com/ugd/dcbeda_dba426ca8d044f03b0976df9ef222987.pdf?index=trueIn PDF document text
    • https://e5447efa-8854-4d04-834e-f0bbd7438c8b.filesusr.com/ugd/ac612b_6ab5ec62215d4522b5738863b47d586d.pdf?index=trueIn PDF document text
    • https://0ac950e2-707a-4e47-8bf4-daface0ea9db.filesusr.com/ugd/356f11_baf8aa2dbf014d869380fba215505b34.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/befarekogol/left_behind_fnaf_roblox_id.pdfIn PDF document text
    • http://saxatizajug.epizy.com/fusunowaxug.pdfIn PDF document text
    • https://s3.amazonaws.com/gowupuzokowuxes/45402393587.pdfIn PDF document text
    • https://s3.amazonaws.com/bokofapig/aerius_calculator_en.pdfIn PDF document text
    • https://6f8cb219-4830-455d-9ced-b55e65700e85.filesusr.com/ugd/fd30ac_959232b5def74c4aaeaa5fba17ffb940.pdf?index=trueIn PDF document text
    • https://d4f4546a-a836-4b3d-8651-c56b89608eca.filesusr.com/ugd/3e9e83_36e8d15c0e564e98be52fd140139d6bb.pdf?index=trueIn PDF document text
    • https://27158da8-170d-48ca-a528-b8ced62fe517.filesusr.com/ugd/9fc8c3_89258561a859457182a04a5937e1ced8.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kizugokofo/42571343549.pdfIn PDF document text
    • https://s3.amazonaws.com/davolazupivowi/epistaxis_clinical_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/xozeb/zelda_ocarina_of_time_n64_gameplay.pdfIn PDF document text
    • https://24a70dd4-b549-4b9e-9c0a-6eea45ab85ad.filesusr.com/ugd/ab0c63_d9db38918fbf4920a9a25d26588787d5.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jawusawar/reporters_episode_11.pdfIn PDF document text
    • https://694dae7a-2033-4a59-8b06-91ff4eec0774.filesusr.com/ugd/e1d58f_5f332b97738845e993b36664571f17a3.pdf?index=trueIn PDF document text
    • https://b4140449-9b96-4148-8619-c9b3eed7b48c.filesusr.com/ugd/c33cdb_9cb7879bb95c4f9b8543e19e0cd1ee19.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_off0000c6de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6DE 5184 bytes
SHA-256: 8ca193eddb7d6401dc58ea6a36c29bbe09c11aea6462ba3af03a6b805cbf5647
font_01_sfnt_off0000d88c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD88C 9664 bytes
SHA-256: e4cac46e28d7840f09e991a6723f80a7b0bcb68ac383fb704281e71e393408b6

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