Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9ee148f59724bde…

MALICIOUS

PDF

90.6 KB Created: 2021-07-07 03:13:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: f0fb001d911cfe3530cdaf514acda4e4 SHA-1: 8c51246910071af2b7755ded3818c2300a66c48d SHA-256: f9ee148f59724bde2cf8322294885b5a6feae647d821cf72e8d2d37c94ee9c92
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links to compromised websites, suggesting it is part of a phishing campaign or a distribution point for further malware. The PDF structure and embedded URLs point towards an attack pattern involving spearphishing attachments, where the document lures the user to external malicious resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://catamma.ru/uplcv?utm_term=the+position+time+graph+of+an+object+in+uniform+motion+is PDF link annotation
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/160814c927bd50---verepewifodumavabebu.pdfIn PDF document text
    • https://agenciaboom.com/wp-content/plugins/super-forms/uploads/php/files/r9q7mc9ba259k9eanpkv8hmov4/2656382105.pdfIn PDF document text
    • http://globaltruthmediagroup.com/clients/a/aa/aa8380eac451876ae6ab993bf3a720d6/File/rasetuvamelimopaxa.pdfIn PDF document text
    • http://es-umzuege-transporte.de/wp-content/plugins/super-forms/uploads/php/files/9529c46ad4e61a01a0dbaf255e2c6eb1/zulotogolamimesale.pdfIn PDF document text
    • https://alternativecarrepair.com/userfiles/file/dirojowewiwawabopu.pdfIn PDF document text
    • http://www.atrium-tuiles.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bff313e8582---kurameb.pdfIn PDF document text
    • https://banghenails.com/upload/file/65427793591.pdfIn PDF document text
    • https://www.nestroots.com/wp-content/plugins/super-forms/uploads/php/files/cr6t0sev1injsi8ek7ekmvklh6/xadebujedilizewagenoje.pdfIn PDF document text
    • http://brothersaluminium.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/160c217efdee0a---nidewiwuru.pdfIn PDF document text
    • https://advance-pack.com/editor_upload/file/lejazusivipibaj.pdfIn PDF document text
    • https://delphin-restaurant.com/ckfinder/upload/files/63483227800.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/nd08v7a14f3b1kvpu8cfo1dum2/vibewesu.pdfIn PDF document text
    • https://shrmivirtual.org/wp-content/plugins/super-forms/uploads/php/files/f48f18e6e5738ce64e4253839048ffd7/58441943046.pdfIn PDF document text
    • https://www.growxponential.com/wp-content/plugins/super-forms/uploads/php/files/vj9khkd23irqn44q61bcehqubh/worewemimifenavofake.pdfIn PDF document text
    • https://babamore.com/upload/ckfinder_temp/files/20210531010335.pdfIn PDF document text
    • https://tenekedjieva.com/uploads/file/tujofapila.pdfIn PDF document text
    • http://itaindustrial.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607c415779cfc---medivuluras.pdfIn PDF document text
    • https://cspdental.com/wp-content/plugins/super-forms/uploads/php/files/e7c914c7b3ec003b597f15d72dbdad12/35558597846.pdfIn PDF document text
    • http://kystop.com/wp-content/plugins/super-forms/uploads/php/files/4po2r5mjbtupq97ogg1s1l6pf5/54948188498.pdfIn PDF document text
    • http://thietkewebbacninh.com/webroot/img/files/kalinazuto.pdfIn PDF document text
    • http://iamsong.vn/uploads/files/dubupusaxurepepamov.pdfIn PDF document text
    • http://graficaeformazione.it/userfiles/file/mekabupumajijutudobumepem.pdfIn PDF document text
    • http://discoveryenglish.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c3ddc8e609b---senutigoxobojowaxodup.pdfIn PDF document text
    • https://vdbergelectro.nl/wp-content/plugins/super-forms/uploads/php/files/988ba79fe828d4aa1513cdaeab458fca/31583400429.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fcee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCEE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011505.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11505 11216 bytes
SHA-256: f7f71d7dc8d5d139769f4068efa66c45672c77640a9d3a22a0f44481713c46f5
font_02_sfnt_off00012ee8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EE8 17264 bytes
SHA-256: 662596aa691e5b790912ddf34ef55cec2938ba046358bb35318f4e33a406310d

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