Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e307baf195c3b80…

MALICIOUS

PDF

92.4 KB Created: 2021-03-28 14:11:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 56c9aca5c20ffdae033b1a26ab95c70a SHA-1: 95b4c11dc1097051e759cacaf7b8b0d0bc947308 SHA-256: 5e307baf195c3b80f60debdc5d9c7b97770fde1429369dd7f36e8e6db1477f87
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with the heuristic 'PDF_SEO_LINK_FARM' indicating a mass of links designed to mimic search engine results. The document body, though heavily obfuscated, contains text related to a journal and a date, suggesting a lure. The presence of external URIs and the ClamAV detection as 'Pdf.Phishing.Trojan' strongly indicate malicious intent, likely to redirect users to phishing sites or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://jumiwimov.ru/award?keyword=journal+ennahar+alg%25C3%25A9rie+d+aujourd+hui+pdf
    • https://tubuwixufadone.weebly.com/uploads/1/3/5/3/135315283/5867965.pdf
    • http://tipografiyav.moscow/gogo_ultra_x_scooter_partsa3euv.pdf
    • https://cdn-cms.f-static.net/uploads/4405430/normal_6036beac4e804.pdf
    • https://cdn-cms.f-static.net/uploads/4495858/normal_60369095057fb.pdf
    • https://kunudixi.weebly.com/uploads/1/3/4/6/134667289/kumesureribugu_safafemanevivad.pdf
    • https://static.s123-cdn-static.com/uploads/4369491/normal_5fceb0187e72b.pdf
    • https://pinosapop.weebly.com/uploads/1/3/4/1/134131344/76d914307cd026c.pdf
    • http://pagebake.com/alesis_v49_manual_espaolp9vu3.pdf
    • http://cardioactiveufficiale.site/kevutuduvoxivewj90zc.pdf
    • http://quinzsy-studio.design/dragon_ball_gt_a_heros_legacy_englijctql.pdf
    • https://cdn-cms.f-static.net/uploads/4443354/normal_601377f9771d2.pdf
    • http://tiktokhd.design/teseketajh54tc.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/gozilum/wewedelejolaxutilukoki.pdf
    • https://s3.amazonaws.com/jolituzoji/sig_p938_sas_slide.pdf
    • https://s3.amazonaws.com/rakabexozu/xuburitel.pdf
    • https://6e37e838-c278-4d46-baa9-25b8497af200.filesusr.com/ugd/fbcb80_0d10c3f41fbe4a9b9181371df2d5b38e.pdf?index=true
    • https://d0bf7e8b-5449-41c0-93e9-161603c0719f.filesusr.com/ugd/197ed4_e2cff84fce4248758be1f7642182b255.pdf?index=true
    • https://s3.amazonaws.com/pevarijidasalop/english_grammar_in_steps_practice_book.pdf
    • https://147762ec-90f0-4523-8579-43cb3cd17c82.filesusr.com/ugd/6c48b9_b189c2ac177e49b9bd07cdf04eb914f3.pdf?index=true
    • https://s3.amazonaws.com/zuvovoxigumuz/programming_logic_controller_software.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012658.bin
0302f963fcc006ea6e6e275e8e67c1a4038d6ed3ea117cae81ddd66023856a67		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12658 5332 bytes
font_01_sfnt_off00013836.bin
2d8862cd48bbbf93c5baeb1937424507bb33bb1f3df0adee547ad5ed51bef5c7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13836 13184 bytes

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