Malicious PDF — malware analysis report

Static analysis result for SHA-256 9cbc13a0217f7442…

MALICIOUS

PDF

82.2 KB Created: 2021-03-17 01:19:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 5aa1c3293c3492d0c2b35c870d384914 SHA-1: 44f14a78cce35ee3b38766179c065fa526afdd62 SHA-256: 9cbc13a0217f744294ab0af1f8664ab979494c52fd745ce68ed87b02e241ef9a
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for Pdf.Phishing.Trojan. The presence of a large number of external links, including one to 'dugedepap.ru', suggests a link farm or phishing attempt. The ML classifier also strongly indicated maliciousness. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the overall pattern points to a malicious PDF designed to redirect users to potentially harmful 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://dugedepap.ru/wix?keyword=weber+kettle+grill+guide+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4374957/normal_60033aa57fb1c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447098/normal_5fddc6ec5b858.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365594/normal_5fe967ac44052.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412583/normal_6000bc3734158.pdfIn PDF document text
    • https://bisenazogogo.weebly.com/uploads/1/3/4/6/134686343/mupomagemanexeze.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424933/normal_6024ca79de869.pdfIn PDF document text
    • https://gupapuna.weebly.com/uploads/1/3/4/7/134726568/zufewexofod-tavuloruj-gozumibugafuli-ruwenoxela.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/xukonakefules/ffxiv_culinarian_leveling_guide_reddit.pdfIn PDF document text
    • https://s3.amazonaws.com/sevoga/ragigosexogofik.pdfIn PDF document text
    • https://a1c9bafd-2917-4c1b-b79c-a4b44a941470.filesusr.com/ugd/f0f215_1c1d423710fe420090b4a7d572feb79c.pdf?index=trueIn PDF document text
    • https://d1b33a7b-cde1-45d4-bc15-d4d3b6236ac5.filesusr.com/ugd/1d64af_cdcc6a2f03294ad3836639050553b69c.pdf?index=trueIn PDF document text
    • https://72b50e20-f79f-40ca-96b4-24bef83e308f.filesusr.com/ugd/1a1092_a0911ea1c69944098c3bc137d25303c2.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sorogamat/apple_music_app_to_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/wenobagupexekap/zizidunepexiritoja.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85e28244-44d5-4cfc-8b79-4eb2e8e5f489/80473632212.pdfIn PDF document text
    • https://s3.amazonaws.com/setigafat/93429012429.pdfIn PDF document text
    • https://s3.amazonaws.com/jefobexapulow/beowulf_anticipation_guide_answer_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a40c7373-be1e-41a9-9ed6-66b5997210db/manual_ms_project_2013_espaol.pdfIn PDF document text
    • https://s3.amazonaws.com/zozofufulolig/nekore.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c630bf11-ef2a-4c51-890d-29552953beca/67755845537.pdfIn PDF document text
    • https://f77c8dad-41d7-4a8f-8d8d-c05149a3a236.filesusr.com/ugd/36d413_466a980a2cb04971a906f67e5cd36e61.pdf?index=trueIn PDF document text
    • https://5e024257-ca51-40df-b6b5-a3104c7b7124.filesusr.com/ugd/97368a_70866d1aa0014794bf7c52fbab3cf9b6.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_off000104d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104D9 5040 bytes
SHA-256: 1db8ec4c675f910568c6fbd4909647626d0e56153beba0a8d1c48bc6072ee204
font_01_sfnt_off0001161f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1161F 11000 bytes
SHA-256: c4ef66b687307cb4bcb5360993ecf682127fe3e6ec2b32483e47b0ceff9303c3

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