Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca2a2d8852207d23…

MALICIOUS

PDF

88.1 KB Created: 2021-04-01 06:15:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f09d61361411d5f1f604adff9f5bd308 SHA-1: 19c725304d8634e572271fcdede7f88e01cf4510 SHA-256: ca2a2d8852207d23be6710e39086dbf88e8a3bf41e7c7ff948324a91d1019024
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a significant number pointing to a link farm designed for SEO manipulation. One prominent URL, 'https://pelibifir.ru/wix?keyword=rmc+sport+streaming+iphone', is flagged as suspicious and likely leads to a phishing or malware distribution site. The ClamAV detection and ML classifier further indicate malicious intent, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://pelibifir.ru/wix?keyword=rmc+sport+streaming+iphone
    • https://bemijeze.weebly.com/uploads/1/3/5/3/135302335/sijibexinibijex_tikoxewematata_zodiketurogemo_begujiluj.pdf
    • https://static.s123-cdn-static.com/uploads/4419827/normal_5feb780dcc3a3.pdf
    • https://kowedeta.weebly.com/uploads/1/3/0/7/130775164/lelozutefub.pdf
    • https://bejutenexej.weebly.com/uploads/1/3/3/9/133997629/tapafojisuroxuzadag.pdf
    • https://static.s123-cdn-static.com/uploads/4417995/normal_5fefaae110c65.pdf
    • https://cdn-cms.f-static.net/uploads/4452837/normal_602a1cb07d091.pdf
    • https://cdn-cms.f-static.net/uploads/4384026/normal_603f1ffc2a4ea.pdf
    • https://cdn-cms.f-static.net/uploads/4425768/normal_6059e582222da.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/rizezobabub/fajamivatatota.pdf
    • https://uploads.strikinglycdn.com/files/650f94b9-a653-44e8-805a-a509069097ef/is_options_trading_legal_in_india.pdf
    • https://uploads.strikinglycdn.com/files/52946541-a456-44a3-a8af-f7167ef767bc/att_uverse_nvg589_wifi_not_working.pdf
    • https://s3.amazonaws.com/savukojubusum/dubai_tourist_map_2018.pdf
    • https://s3.amazonaws.com/sowewazulejewi/1576889797.pdf
    • https://s3.amazonaws.com/gekojulog/kindergarten_worksheets_booklet.pdf
    • https://s3.amazonaws.com/muvevanepen/mogugusolejedom.pdf
    • https://s3.amazonaws.com/fosalizuzu/58836231581.pdf
    • https://ef733714-782c-48ea-8991-1bc0bf0c95f2.filesusr.com/ugd/ad2ade_4fb2e3a2bbcc4d2fb5e65719d82274da.pdf?index=true
    • https://uploads.strikinglycdn.com/files/d21fe174-2534-4c14-82be-8901f6939b5a/ff7_guide.pdf
    • https://uploads.strikinglycdn.com/files/724badb5-f301-490a-a7ce-2f471ab3048c/tajenaxifovazavekawirosas.pdf
    • https://s3.amazonaws.com/pevarijidasalop/tisorenunujeku.pdf
    • https://s3.amazonaws.com/zatazewoz/jafisutozozajarew.pdf
    • https://s3.amazonaws.com/jamuluvuvava/27778380388.pdf
    • https://0a01f052-6ee6-4bfa-868d-d2e49373b03f.filesusr.com/ugd/55f640_d0f099b6f7524204a39824d4df3a0d4e.pdf?index=true
    • https://da6a6a96-7907-4aac-bfe3-592928b14ca9.filesusr.com/ugd/39e844_91c998364eff4d9282e5d171e0c5796d.pdf?index=true
    • https://uploads.strikinglycdn.com/files/db7d3d16-bed4-48ca-9801-21909a55a3cb/togapevajafijotaxudedajuw.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f5ad.bin
7bd84a5256468f878455fc241676ee6e7a3f1fb395330e5cfad68f13f247638b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF5AD 5112 bytes
font_01_sfnt_off000106d9.bin
d25d76d57a090190dd8dcb3d92fba726da96e994489930e2f7dc9d915dafe6c7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x106D9 12100 bytes
font_02_sfnt_off00012e1c.bin
4ef9506ee11a349461550e6b437e3786686b598308a87786035880d16624999d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12E1C 16060 bytes
font_03_sfnt_off000142b4.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x142B4 4324 bytes

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