Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2d058b4eae0c30d…

MALICIOUS

PDF

76.6 KB Created: 2021-07-04 07:13:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: fba45bd85528d91e15ab99268c37c611 SHA-1: 6eb56fc28bf3f71d7a298f9108d2baa404616e04 SHA-256: b2d058b4eae0c30d32f509dfe2600791aff1640eff14749fa847f30cf3b3d410
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links pointing to external websites, many of which are hosted on compromised CMS upload directories or disposable hosting. The ML classifier strongly indicated maliciousness, and the presence of embedded URLs suggests an attempt to redirect users to potentially malicious content. No scripts were extracted, but the overall structure and URL patterns are indicative of a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9943

Heuristics 5

  • 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://garglob.ru/uplcv?utm_term=water+valley+campground
    • http://snap-drone.com/userfiles/file/92902308379.pdf
    • https://www.gs-gleichmann.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608323d47a39a---82448302714.pdf
    • http://stkvn.ru/wp-content/plugins/super-forms/uploads/php/files/46391d090cd2c346cf6dc3e4b87c8381/tojenojosuvilumere.pdf
    • https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2fbfb78250---5195816600.pdf
    • http://patrick-vallot.com/upload/files/20623655231.pdf
    • http://specimport.by/files/files/biliraxo.pdf
    • https://brusroom.com/wp-content/plugins/super-forms/uploads/php/files/c9e2bf2bfc565f3c8818c067130050f8/19607028156.pdf
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/160875af1c201b---31349112144.pdf
    • http://www.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099e54bb1587---76106822327.pdf
    • http://kelvista.lt/images/files/50459053597.pdf
    • https://brylka-kfz.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609bb1a1a9a08---mebogokitopopalovu.pdf
    • https://freedomtampons.com/wp-content/plugins/super-forms/uploads/php/files/63c09320aa6320474069d8216f81e733/58761252889.pdf
    • https://takiminsahada.com/wp-content/plugins/super-forms/uploads/php/files/pq1qumu3qnds6tns5u138fgcum/96957702446.pdf
    • http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/160be40575c585---7409115811.pdf
    • https://massagetheory.ca/wp-content/plugins/super-forms/uploads/php/files/71969ae986bbcb55aa4c945018fa816f/kuwevoba.pdf
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/e888b4ef1241e472488b1faf13576caf/92785717515.pdf
    • https://sharzh-ufa.ru/wp-content/plugins/super-forms/uploads/php/files/e1baf9c60209373654b28c523a8d2eb5/dudas.pdf
    • http://domholidays.com/userfiles/file/14257433833.pdf
    • https://connect.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/188075609466dd14e256710eea4c7077/24663818396.pdf
    • http://gleneaglehoa.org/images/file/55613744606.pdf
    • http://www.recetasyconsejos.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088c1bd906a6---rukilixiwevol.pdf
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bbd56c146da---27401235999.pdf
    • https://gtsonline.nl/wp-content/plugins/super-forms/uploads/php/files/7m8s1t4g4v4hlsl8v5v0dlrdrm/naxamadodoribenoto.pdf
    • https://bladmedyczny24.pl/wp-content/plugins/super-forms/uploads/php/files/30e3bb5d93983ad591e84a547b5204fb/wugawaguxubakebevu.pdf
    • http://www.maarsehoveniers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16084418d1c0b5---xajofiwunebiwo.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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ca22.bin
ddf96f612f1f2b44c65ee8932b13cc13bbcf0fee708b77ac59d77473de1a7982
pdf-font-stream PDF embedded font (sfnt) at offset 0xCA22 16360 bytes
font_01_sfnt_off0000f472.bin
ce6838e5794fa189a0ba388cd8cb97e70cb8566fe70374e0299cfc31e3cb3a7b
pdf-font-stream PDF embedded font (sfnt) at offset 0xF472 10872 bytes
font_02_sfnt_off00010d6e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10D6E 16792 bytes