Malicious PDF — malware analysis report

Static analysis result for SHA-256 09405e516ce3a594…

MALICIOUS

PDF

75.7 KB Created: 2020-12-23 10:18:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: cb2552b4f45fdfba73c0bebc7756bd21 SHA-1: 2ba2a3851e9267199a3137446750ce73c563b22a SHA-256: 09405e516ce3a594bea07f5e9e9ac27b4d36469ceff3acd467a76df261b4c5d3
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://traffmen.ru/strik?utm_term=lightroom+cc+color+correction'. This URL is likely used to lure users to a malicious site. The ML classifier and ClamAV detection further support the malicious nature of this PDF, indicating it's a phishing or trojan delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://traffmen.ru/strik?utm_term=lightroom+cc+color+correction In PDF document text
    • https://cdn-cms.f-static.net/uploads/4387240/normal_5f919b83442ae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368504/normal_5f8b38a3d3204.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415950/normal_5fd81cc79a5f3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377924/normal_5f956f01dc430.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/c68d464b-4bc6-430d-a829-b04a36577496/zikipekefadaki.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1dfe398d-e0f0-4b81-8fb7-71c770266d84/50486135649.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f58360a-d73b-45a3-99ee-05327acbf5cf/52284349456.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0b6a25c-7c2b-4857-b2c6-4edd4584ab59/exercices_corrigs_trigonomtrie_terminale_s.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc653a7cd1e280355f935b8/t/5fcda3c7c00f007cea045d15/1607312328469/2986254330.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/31c4cf78-f73d-466d-8553-11d80d2483cb/nuzusijanoromi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/674f99db-a7a0-4294-9255-a2639a99acbc/golds_gym_xrs_20_weight_bench_reviews.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c67a9470-5a46-4aac-807c-b12ecddfddd7/pusozegefosupugoke.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb5ad814-2ff4-4c26-b3f7-0dee1ca9fc03/scholastic_book_fair_2019_preview_video.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc29fdf0b6b03258f4092dc/t/5fc48ff42dd96f59187f7105/1606717429345/the_cup_of_tears.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e162.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE162 4556 bytes
SHA-256: 5f604e88de57ba69055f7641242311e44838fd79afa7f96de9a591a057e62149
font_01_sfnt_off0000f0b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0B3 10272 bytes
SHA-256: 56684ab4fa289b700b30bb0ead4a3087896e955846ba3551649a376f935944da
font_02_sfnt_off000113b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113B6 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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