Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9a8f244ba7befbc…

MALICIOUS

PDF

74.0 KB Created: 2020-12-30 01:14:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: d92ddb2b6b81df6ceabead73fa7a2081 SHA-1: 2844b73ea6477f0d2212b6177efae6dcbfbb5525 SHA-256: f9a8f244ba7befbce34373d180dcfdfa12d95563a3baf5fab33a7d6b28f1df20
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of a PDF link farm heuristic suggests the document is designed to redirect users to external sites, with one such URL being trafficknew.ru. This indicates an attempt to lure users to a potentially malicious site, likely for phishing or malware delivery.

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 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://traffnew.ru/strik?utm_term=at%2526+t+prepaid+login+with+pin PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4463810/normal_5fc08816d8c9d.pdfIn PDF document text
    • https://cdn.sqhk.co/kipezipilojo/2jfxlDP/scentsy_nightmare_before_christmas_wax_melts.pdfIn PDF document text
    • https://cdn.sqhk.co/disidudi/phjhcjf/ts4_cc_maxis_match_skin.pdfIn PDF document text
    • https://zuxadozi.weebly.com/uploads/1/3/4/6/134662888/vosuxizave_puvapo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488330/normal_5fe8c98fe7173.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502464/normal_5fc0d43fc14bd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489240/normal_5fd781d7c6485.pdfIn PDF document text
    • https://dokakida.weebly.com/uploads/1/3/1/3/131380589/dekit.pdfIn PDF document text
    • https://jinunezig.weebly.com/uploads/1/3/4/3/134308797/3951396.pdfIn PDF document text
    • https://fovivijidilel.weebly.com/uploads/1/3/4/8/134888041/puvutafaguvupabege.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d7c2c49-e29f-4868-a6da-5cf875bff338/26623820631.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a405455-9cea-42d3-9da0-f54c0d79b371/73438188359.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a25b95ee-a74f-4dc8-8db5-05c2cb215a2d/dingoes_ate_my_baby_band_t_shirt.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/08b11209-719c-425b-8996-fe8a96375210/best_universal_remote_control_for_samsung_smart_tv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8d3a912-5a89-45d8-be4e-cd4fb073a7c8/duleze.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e84cf30-52b6-47b4-b7ca-46f9735c3d1d/obd1_to_obd2_adapter_gm.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f924add-40f7-4e86-be22-4060b3f7eb6f/circuit_analysis_theory_and_practice.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_off0000e73d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE73D 4144 bytes
SHA-256: 8d99b10ab6642920c90bd75e97e4aa2f52d5bbee369924c47dc6fed17b9b865c
font_01_sfnt_off0000f55f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF55F 11144 bytes
SHA-256: 536ec2571fb4f1100658d65ab17451726660d62d3fcecdd3c8d3af54d563ecf2

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