Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6dfb2cb57966a4c…

MALICIOUS

PDF

80.1 KB Created: 2021-03-08 05:07:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 40957854633cb9bba42acd5807a9885d SHA-1: e7cd7176f3159d86d16e65b560dfb4922d041d3a SHA-256: d6dfb2cb57966a4cbcb12bbc5599d201663b6332d1fd10f6c26e9edc51c1a4fc
186 Risk Score

Malware Insights

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

This PDF document is identified as malicious by ClamAV and a machine learning classifier, indicating a high likelihood of malicious intent. The document contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO manipulation tactic. One of the embedded URLs, 'https://baarspo.ru/strik?utm_term=will+g29+wheel+work+on+ps5', is directly referenced, and the overall structure points towards a phishing or malicious redirection scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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.
  • 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://baarspo.ru/strik?utm_term=will+g29+wheel+work+on+ps5 PDF link annotation
    • https://cdn.sqhk.co/sisuriwul/nghiatC/new_magic_keyboard_2020_macbook_pro.pdfIn PDF document text
    • https://cdn.sqhk.co/sirezozere/g7yLRhd/band_of_brothers_free_mp4.pdfIn PDF document text
    • https://cdn.sqhk.co/jogekiluse/ChjbhaY/hide_hidden_files_mac_sierra.pdfIn PDF document text
    • https://cdn.sqhk.co/posebozej/RCrKjer/ant_family_words.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384308/normal_6041745f6ff0c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375200/normal_5fddfb197eaf0.pdfIn PDF document text
    • https://cdn.sqhk.co/kidatufo/cahfoib/stainless_steel_square_tube_weight_calculator.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404310/normal_5ffcb36e19544.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369916/normal_600494c8104b9.pdfIn PDF document text
    • http://kokawerawofovi.iblogger.org/bexojafaladarazox.pdfIn PDF document text
    • https://cdn.sqhk.co/pujunuzivas/gfhjfhf/conquest_synonym_word.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://8cff94d3-ecab-4ea5-ad27-d3e67d02fd32.filesusr.com/ugd/2813e2_b0b79caada464ef8834a6f51f50c4bc0.pdf?index=trueIn PDF document text
    • http://junenizexi.epizy.com/data_science_salary.pdfIn PDF document text
    • http://xofigawarogipiw.rf.gd/clep_analyzing_and_interpreting_literature_examination_guide.pdfIn PDF document text
    • https://ca108e69-7b6b-43f0-8f16-d96ebeb8a33d.filesusr.com/ugd/79e0dc_09301e9a39df4f8eb197a5d7e5889a65.pdf?index=trueIn PDF document text
    • https://2a4b29e6-a790-453e-81e7-e8b9caf2c27b.filesusr.com/ugd/bf0735_8048c4fbdab042b0a377c77f8b8526d7.pdf?index=trueIn PDF document text
    • https://6cb1c90e-07cf-4522-b85d-4edd8abc33c8.filesusr.com/ugd/0c41e7_bcd6f17c1bb24689be13d6bba14186cd.pdf?index=trueIn PDF document text
    • https://b1b0174c-961c-4936-87f6-765e1132391e.filesusr.com/ugd/6cf804_a956dc3a220a4982b9a97e43434c46c9.pdf?index=trueIn PDF document text
    • https://3bcdeb60-9876-4d14-bc0a-1dd1632c647c.filesusr.com/ugd/16a96a_33243ca1478e491aa8b5e8e33c83c60e.pdf?index=trueIn PDF document text
    • https://c6926203-1eb9-401e-9afa-11f61f201807.filesusr.com/ugd/685707_99ce66753719452093d3f521734de9ed.pdf?index=trueIn PDF document text
    • https://932aa67c-856a-4fda-9fc8-fe3f50d4acc2.filesusr.com/ugd/a25eee_8f4df8b533104c9ca4fa94e37520b9f9.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA7B 6744 bytes
SHA-256: 0eac1552a6a0cc8d6d43e14f5c157d052ff2bf21460314f67a2c213e0a454e63
font_01_sfnt_off0000fb62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB62 5452 bytes
SHA-256: e6ebabd03575ff94f66678ac566e161553b3c2fbde0e54ab40a67856774d40e9
font_02_sfnt_off00010e0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E0F 10756 bytes
SHA-256: a96ab9e0f3801e2d0ecc920ef80ffacdc6a5ad644ff85d40e928a3eaa2cadbfd

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