Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0afe385ea612e57…

MALICIOUS

PDF

128.3 KB Created: 2021-03-17 07:10:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2405925ee2a8f977de366191b2d5e04e SHA-1: e37cd4856e889bcf42844eff6bdd41f7b192feb0 SHA-256: b0afe385ea612e57ad45ed5c7f10b12bd76e41cff6dd694a0b6652171835d374
156 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, a common tactic for SEO spam or phishing campaigns. One of the primary links, 'https://gimoguvi.ru/wix?keyword=alphabay+tor+link', directly suggests a connection to illicit marketplaces. The presence of numerous PDF links and the ML classifier's high confidence score indicate a malicious intent to direct users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://gimoguvi.ru/wix?keyword=alphabay+tor+link
    • https://cdn-cms.f-static.net/uploads/4530990/normal_6047fe3f4592c.pdf
    • https://sutapupimode.weebly.com/uploads/1/3/4/6/134615637/ee5b2645ec5.pdf
    • https://xodukibefapox.weebly.com/uploads/1/3/0/8/130873769/64945d3b30.pdf
    • https://static.s123-cdn-static.com/uploads/4448719/normal_5fcb2434c1937.pdf
    • https://fitokuzigijot.weebly.com/uploads/1/3/4/6/134681543/938671.pdf
    • https://ganegekisawaji.weebly.com/uploads/1/3/1/4/131406809/f331341038.pdf
    • https://wejolizamu.weebly.com/uploads/1/3/4/7/134766198/tejakufe_napibatoti_pitirutizar_gekobe.pdf
    • https://vitafidazi.weebly.com/uploads/1/3/4/7/134728623/miviwiwanipagej.pdf
    • https://cdn-cms.f-static.net/uploads/4380090/normal_5fd99f3d770db.pdf
    • https://selubigal.weebly.com/uploads/1/3/4/5/134518702/xalogaxugudifudu.pdf
    • https://zeraxoxuret.weebly.com/uploads/1/3/4/6/134642117/3372466.pdf
    • https://bojijoda.weebly.com/uploads/1/3/5/3/135325587/8673752.pdf
    • https://xowitato.weebly.com/uploads/1/3/0/7/130776358/joviripukod-xuzemi-laluj.pdf
    • https://vewirorerisemi.weebly.com/uploads/1/3/4/6/134627211/4357492.pdf
    • https://cdn-cms.f-static.net/uploads/4452587/normal_604b17e5ce82f.pdf
    • https://static.s123-cdn-static.com/uploads/4371247/normal_5fc6860dcc1d8.pdf
    • https://fojumotapikapig.weebly.com/uploads/1/3/4/3/134372119/2520655.pdf
    • https://vinofuloro.weebly.com/uploads/1/3/4/8/134850824/ropom-gisogebi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://184d393c-d2ff-49e5-bbcb-48626b1dbf88.filesusr.com/ugd/49be48_ae2615e9129d45fbac8df07f7c805898.pdf?index=true
    • https://4253c66a-660d-4c83-b31d-f715833d547b.filesusr.com/ugd/d9e9a0_282d52529e694f6a902fa59d5df31e0c.pdf?index=true
    • https://2c5a832e-93c4-4ab0-bef0-969ef348d747.filesusr.com/ugd/cc5daa_082b2130c05e47fc8cdbee5c05513c6a.pdf?index=true
    • https://52ed6390-a5c1-4502-9f93-599cf6d98ad1.filesusr.com/ugd/f7fbc8_df5991ce71f54562b3b97f82d6c694a0.pdf?index=true
    • https://4f6c49ad-35c2-4e1b-a50e-a4ca4816ee30.filesusr.com/ugd/a28dad_8e0987ad90bc4db8b0976578a2420fa4.pdf?index=true
    • https://9d76d0c6-5807-43ac-a2ba-7b4112d1a20a.filesusr.com/ugd/5cd33b_13fcd9e9685f41f987a2936227be6595.pdf?index=true
    • 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_off0001b5c1.bin
46de26cb22a2ece6e3a859c17bc7f6cc5d4a90cd473d215cfd82c2a59adbf2c6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1B5C1 5024 bytes
font_01_sfnt_off0001c6d4.bin
0351da9fef2424879532d8cc57c4723d28807d890f9c1413a7398f58a624247a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1C6D4 13612 bytes

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