Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f1896e80eed9713…

MALICIOUS

PDF

90.0 KB Created: 2021-09-02 06:56:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: fe711b274d71e90afb13ec15e854adbf SHA-1: b42f469d86176eac695fa079d02b4c6b01dd728a SHA-256: 0f1896e80eed971315181460853ebe4c8869602d245c741564f4656d855d31e1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as a link farm, with many URLs pointing to potentially compromised websites or disposable hosting. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and numerous external links suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://garglob.ru/uplcv?utm_term=comic+stories+for+kids+pdf PDF link annotation
    • http://www.homefacelifters.com/wp-content/plugins/super-forms/uploads/php/files/b13544a1d09b2fcaacd94e33d56e8145/52991706059.pdfIn PDF document text
    • http://kotolantopeni.cz/file/wirotetovobarekob.pdfIn PDF document text
    • http://bogieclassof67.com/clients/71235/File/xavonoz.pdfIn PDF document text
    • https://arch.ua/ckfinder/userfiles/files/wubemojekutegopusutaviju.pdfIn PDF document text
    • https://grupo-bahia-real-estate.com/ckfinder/userfiles/files/47251282692.pdfIn PDF document text
    • https://eccdc.org/application/webroot/userfiles/file/fonaronafira.pdfIn PDF document text
    • http://diagonal.org.ar/wp-content/plugins/formcraft/file-upload/server/content/files/1607ff5a81ae7c---6378720004.pdfIn PDF document text
    • http://allnatureint.com/userfiles/file/6263922875.pdfIn PDF document text
    • http://velocimapper.com//webfiles/file/doxegazuvogudel.pdfIn PDF document text
    • http://aftp.bg/userfiles/file/67232464500.pdfIn PDF document text
    • http://picassogift.com/Uploadfiles/files/75007180826.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/148907f3ed491984742f171569428e09/50635425193.pdfIn PDF document text
    • http://mulherinscampground.com/clients/879992/File/fufomusepoxane.pdfIn PDF document text
    • https://diversifiedhumansolutions.com/wp-content/plugins/super-forms/uploads/php/files/ab274f14c190b47946f1a5e5d99ecebe/pujivonofuja.pdfIn PDF document text
    • https://reparationmobile.net/userfiles/file/namog.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/753cda94295a628ab6a52e957861f6b8/21574039416.pdfIn PDF document text
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1607eeda967c01---tonuluketaxegar.pdfIn PDF document text
    • http://queuemanagementsystems.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611650309d813---sirup.pdfIn PDF document text
    • https://hacunamatata.ru/wp-content/plugins/super-forms/uploads/php/files/a7661a6ca4e1e026a92895b966fbb69e/favaditawinotilokidar.pdfIn PDF document text
    • https://luxmarketing.agency/wp-content/plugins/super-forms/uploads/php/files/d0nbu8tjeus4elbbe2eta11mbr/wixifekofogomopadexezaro.pdfIn PDF document text
    • http://evevoyance.fr/adh/.-/file/95578360285.pdfIn PDF document text
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081a868f41fb---vataguxugagow.pdfIn PDF document text
    • http://www.mezmat.ru/ckfinder/userfiles/files/32863765843.pdfIn PDF document text
    • http://pokewaveanaheim.com/uploads/files/fobepozekemoj.pdfIn PDF document text
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6193b13068---fitikobegokodopeb.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_off0000fde8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDE8 10592 bytes
SHA-256: 71a2b7d5f25b185759de2505d10e7a836660b6f95a6366cb18f94548729ac89e
font_01_sfnt_off00011621.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11621 16956 bytes
SHA-256: d075e5c33d0324bce151ee965af69d63225b5be0b80dd7f0ed94d45503458e3f
font_02_sfnt_off0001422b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1422B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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