Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fdee25c513de103…

MALICIOUS

PDF

89.3 KB Created: 2021-07-27 12:46:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 3bd55a200db3be35838c986ebb6b2eae SHA-1: 399a0fe11f74aa0c1c3828b1b8c9c9dda3501a03 SHA-256: 0fdee25c513de10380e0ca5e152dad16b2407071f1e84b79050b71ef2f4bdfec
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm with numerous URLs pointing to disposable hosting and compromised CMS upload directories, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the structure and URL patterns are consistent with malicious PDF lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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 http://heyumpnd.com/userfiles/file///sajodofopugelodemuxu.pdf In PDF document text
    • http://jorkurojus.com/userfiles/file/89226171118.pdfIn PDF document text
    • https://www.focus.mu/wp-content/plugins/super-forms/uploads/php/files/d82c95243d09c563032c53a756beec48/17407964715.pdfIn PDF document text
    • http://chromavials.com/d/files/60270865357.pdfIn PDF document text
    • https://www.properties-thassos.com/wp-content/plugins/super-forms/uploads/php/files/s7a9f4f8etkedahk7c0mursqdm/tewiva.pdfIn PDF document text
    • https://jahanchart.ir/data/files/file/69958586154.pdfIn PDF document text
    • http://ahcxdq.com/uploads/file/170544296310.pdfIn PDF document text
    • http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/160ad2ba2b3806---pozamugekoz.pdfIn PDF document text
    • https://akapacha.com/userfiles/file/71383523964.pdfIn PDF document text
    • https://geneticapanama.com/userfiles/file/52487550315.pdfIn PDF document text
    • http://haphadoor.com/upload/files/zamejadenuzira.pdfIn PDF document text
    • http://kalikraft.com/images/file/5413067743.pdfIn PDF document text
    • http://www.psstrecno.sk/wp-content/plugins/formcraft/file-upload/server/content/files/1606f4183e18c2---24566934171.pdfIn PDF document text
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/7066b98a91096524629e4ccbcc63dcb2/fudurinomasapijikido.pdfIn PDF document text
    • http://shinserviceodi.ru/wp-content/plugins/super-forms/uploads/php/files/e8fa2f3fdfe46a9b21e5d410f23857b5/fisajuwasokuduvo.pdfIn PDF document text
    • https://alzubidi.com/userfiles/files/94379249.pdfIn PDF document text
    • http://allseasonsart.com/uploads/fck_uploads/file/43985514198.pdfIn PDF document text
    • https://filetorme.com/upload/files/gaviwe.pdfIn PDF document text
    • https://atcotourismtravel.com/userfiles/file/48311497333.pdfIn PDF document text
    • http://auto-spec.ca/fck/file/79427846391.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/fojokafugosovekarobu.pdfIn PDF document text
    • https://ethnicminorities.heephong.org/ethnicminorities/cmsadmin/ckfinder/files/sexibogixudivukofopa.pdfIn PDF document text
    • http://bbfrontedelmare.com/userfiles/files/wolelonogexos.pdfIn PDF document text
    • http://arci-mp.fr/admin/File/woremeso.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=how+to+watch+sarkar+3+online+freePDF link annotation
    • 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_off0000f694.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF694 10776 bytes
SHA-256: dca8fa3a18a15520038968e396b034b5db5321e02d1e0c6646a9b373b1793e87
font_01_sfnt_off00010f67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F67 17904 bytes
SHA-256: eee3bf80084c9de9d86ab0d10fafebc01da522e9884daabfd2f18fd0aa55cc05
font_02_sfnt_off00013e5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E5A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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