Malicious PDF — malware analysis report

Static analysis result for SHA-256 125dcc2da04c867d…

MALICIOUS

PDF

68.9 KB Created: 2021-02-22 03:22:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 5a671f857af5e72ab96eb8ae8c969dab SHA-1: 400bd097019a9f65a3478cffc42d2110cc28fe7e SHA-256: 125dcc2da04c867df3653ebf33f8d780962073e76c086615c5aebceb80da677c
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector infrastructure, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing lure, likely leading to a second-stage download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://yafferge.ru/strik?utm_term=smartparts+digital+picture+frame In PDF document text
    • https://cdn.sqhk.co/bikegola/ggd2gc6/wamezapilufupegoze.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473656/normal_6019d78a69650.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370051/normal_60087e8f58e7c.pdfIn PDF document text
    • https://cdn.sqhk.co/gupikekarobo/jbsgHfM/infinity_pool_cost_australia.pdfIn PDF document text
    • http://manekobe.22web.org/71006240061.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415065/normal_5ff3ef3c89628.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465556/normal_5fcb9c3c5be2c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422659/normal_6008327dc31ac.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446147/normal_5fdd21f68e680.pdfIn PDF document text
    • https://cdn.sqhk.co/fofateze/8iagiHz/4004955009.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473903/normal_6004be892c684.pdfIn PDF document text
    • https://cdn.sqhk.co/kavejufa/hjgY1ki/avatar_of_the_wolf.pdfIn PDF document text
    • https://cdn.sqhk.co/rekutadis/Ohekhhs/my_talking_panda_virtual_pet_games.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495973/normal_60298ee595a1d.pdfIn PDF document text
    • http://gifazat.iblogger.org/75216350474.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381971/normal_5fe59645388f6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390324/normal_5fe1d7094a692.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fuwotimusajitos.rf.gd/raral.pdfIn PDF document text
    • https://s3.amazonaws.com/xulepiwa/72617779038.pdfIn PDF document text
    • http://lojupefiduk.epizy.com/pojisim.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_off0000cd80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD80 5580 bytes
SHA-256: 2042085ee15e75eb2ff2b5432710993f98ae257bea73acc21856beedf9b5980f
font_01_sfnt_off0000e05e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE05E 10628 bytes
SHA-256: 43fd0da17083582367097ef83947f10ed05b352c2b830be493a7756ac5a6d376

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