Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f46ce8796ab7c87…

MALICIOUS

PDF

81.0 KB Created: 2021-03-31 13:56:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: cb4ab075af774363d38af064ab3c00f7 SHA-1: 5fcd822545b998402e7021341366c1d0759c145c SHA-256: 0f46ce8796ab7c87da654ed0064021ff1ae2c1e5f6996d9e4dbc39e3a8454624
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a critical heuristic identifying it as a 'PDF_SEO_LINK_FARM'. One of the primary external links points to 'fokemale.ru', which is flagged as suspicious. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution via link farms.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://fokemale.ru/strik?utm_term=stand+by+me+stephen+king+cast PDF link annotation
    • http://mowuvivof.22web.org/ambition_definition.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/vovopafubipu/mutowowopifexomov.pdfIn PDF document text
    • http://mokimonanogi.rf.gd/date_a_live_kotori_spirit_form.pdfIn PDF document text
    • https://6eed613e-cbae-405e-b458-9655ef9033f8.filesusr.com/ugd/e4f6f0_e98ab419d6f44697af634e8ed6475942.pdf?index=trueIn PDF document text
    • http://xisirajotijejuw.rf.gd/business_trip_report.pdfIn PDF document text
    • https://a765b249-d442-4b07-8ea9-8318d996b894.filesusr.com/ugd/902d29_4a25fd0cae6a4ae389d99080eb89b6f8.pdf?index=trueIn PDF document text
    • https://abbf68a8-5b21-4996-91be-11266bd273ed.filesusr.com/ugd/9374a7_71872cb827fa457aba0ac20face60d07.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bupijila/80174855465.pdfIn PDF document text
    • https://s3.amazonaws.com/leteraxewe/nugitotejitumegidavixig.pdfIn PDF document text
    • http://nodikisiti.rf.gd/35506083974.pdfIn PDF document text
    • https://601bead5-a720-4f65-98db-62fe2a42cb91.filesusr.com/ugd/0e52b4_4456b1c977b04fa0b531d5ff318f66e4.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zumomasugipeno/panalenepizow.pdfIn PDF document text
    • https://s3.amazonaws.com/zoromexemuzid/chevy_equinox_2011_manual.pdfIn PDF document text
    • https://2dc0326d-ac60-47d8-bf46-f2dc9d334570.filesusr.com/ugd/21b4a7_34abf4aa10014ee19a7c6e6cd30f2d5c.pdf?index=trueIn PDF document text
    • https://d4078116-a2d5-466f-97e6-20d899f6ca30.filesusr.com/ugd/576447_5c3d7228337648e9b45a68ab22aefa73.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jozetej/30545627195.pdfIn PDF document text
    • https://s3.amazonaws.com/tisegovofu/71546476172.pdfIn PDF document text
    • https://s3.amazonaws.com/sajatesawodiji/deltek_costpoint_7.1.1_user_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/nagev/microsoft_windows_server_license_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/degagaziv/telangana_election_report_today.pdfIn PDF document text
    • https://49b7c339-fea6-4bb3-bf7b-ca47af5263df.filesusr.com/ugd/6ca12d_a60eba3bcdfc4f21acdc3f99ecd00391.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sorogamat/54996200900.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f086.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF086 5448 bytes
SHA-256: b8cb27558058c7f794cd471474b66c04c6e1b00ea082c77346e1d3b196cd5650
font_01_sfnt_off000102dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102DD 11072 bytes
SHA-256: 2f4935b7bb296aae545a7ffe73a0a4a99929e292a9c3b8eea8881a908310aefd
font_02_sfnt_off00012873.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12873 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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