Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d8e76acc6758784…

MALICIOUS

PDF

87.0 KB Created: 2021-07-22 00:44:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 8d38c530a631df04c8388cb319374ae6 SHA-1: b56f12e704d39cc710d8749848e203532119faf7 SHA-256: 0d8e76acc6758784e5d33872854e2d0c8011fbc71719dae46e6075168cfa3fd6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links pointing to websites hosted on compromised CMS upload storage, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware delivery. No scripts were extracted, but the structure and URL patterns are indicative of a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/378bf53f9c06440e149045357898dde4/laxonuvexe.pdf In PDF document text
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086b821ea7f6---muponezig.pdfIn PDF document text
    • http://bodegaadrover.com/userfiles//imagenes/bijavajejovefuxegigup.pdfIn PDF document text
    • http://dothi.info/images/files/59783052288.pdfIn PDF document text
    • http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d232f3e941---46772172937.pdfIn PDF document text
    • http://vasilii-orlov.fun/wp-content/plugins/super-forms/uploads/php/files/92648e5d672f7008e1a3dd5e31b05aa2/54429432080.pdfIn PDF document text
    • https://q-web.ro/wp-content/plugins/super-forms/uploads/php/files/t6v1e12sgq6cqdhvqnn44rnl4c/56322511590.pdfIn PDF document text
    • https://aeap.com.br/ckfinder/userfiles/files/xorarabom.pdfIn PDF document text
    • https://jackyrouxmethode.com/userfiles/file/fotavekifun.pdfIn PDF document text
    • http://charontrade.hu/data/file/22869923873.pdfIn PDF document text
    • https://www.ideaklinikizmir.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072aaf3ee807---45767768429.pdfIn PDF document text
    • http://promocode.lu/userfiles/files/38173952042.pdfIn PDF document text
    • http://esthebel.de/userfiles/file/92763287658.pdfIn PDF document text
    • https://dietacud.eu/upload/file/10616544981.pdfIn PDF document text
    • http://alemotta.com/resources/original/file/natur.pdfIn PDF document text
    • http://cgpreceptor.com/ckfinder/userfiles/files/tekogojudawevobesadut.pdfIn PDF document text
    • https://qualitycountscleaning.com/wp-content/plugins/super-forms/uploads/php/files/6223fda46a3a0b719f72b3b939faf250/revinokejudaxokosa.pdfIn PDF document text
    • http://globaltruthmediagroup.com/clients/a/aa/aa8380eac451876ae6ab993bf3a720d6/File/metisanelamek.pdfIn PDF document text
    • https://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/86ee8da5e8d8913351c28ae2e11140a8/pazave.pdfIn PDF document text
    • http://www.findvoters.com/userfiles/file/87505410995.pdfIn PDF document text
    • https://fetogram.ir/images/upload/files/ditugujijazotujin.pdfIn PDF document text
    • http://bmcnx.com/userfiles/file/zebevasegezag.pdfIn PDF document text
    • http://ipllaser.in/uploads/bekijixaxalosevorunupov.pdfIn PDF document text
    • https://jfefood.com/wp-content/plugins/super-forms/uploads/php/files/96c6a7575f90aaa9fd67a686fb8a1dd2/surorifirot.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=what+are+you+up+to+meaningPDF 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_off0000f3b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3B2 10692 bytes
SHA-256: 7ef08fa3b517e7a61104e59f6decbab7266670ab0e6049ec0d541fa263911501
font_01_sfnt_off00010c10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C10 16064 bytes
SHA-256: abae482c624955b41c34d2d9d16325fc5e61b910b77479a600b33e2c343a940a
font_02_sfnt_off0001357b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1357B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1