Malicious PDF — malware analysis report

Static analysis result for SHA-256 317cce6c062d1870…

MALICIOUS

PDF

94.8 KB Created: 2021-08-14 23:30:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 46acb7a5fa71c6ea4c2d027877d12c77 SHA-1: 377b37d1161f2ef09a7ecc2e25c7832f1fdce84a SHA-256: 317cce6c062d187016333ef3cc68eec4f5eacf799795e271f4e14a4475a5f91b
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a link farm pointing to compromised WordPress sites, likely intended to trick users into downloading malicious files. The presence of a 'download button' lure further supports this phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://interesttour.com/wp-content/plugins/super-forms/uploads/php/files/81284cb0673c9a352de95f32d91ba002/jufusinojolotuwotupirat.pdf
    • https://eyestech.in/wp-content/plugins/super-forms/uploads/php/files/k5m0hk7jnahkub2sk1jglmniq6/dakebuguremulijewofol.pdf
    • https://www.accidentinjurylascruces.com/wp-content/plugins/super-forms/uploads/php/files/hplinnm7agj5f1hf0n3j4i61l4/72560704678.pdf
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/76d83a432287f7437233089425228372/gaxuxir.pdf
    • http://lirealestatelitigator.com/wp-content/plugins/super-forms/uploads/php/files/b035d2263704ac742e40ea1f1ffc4007/dutezapokizuzapem.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8c56178536---dabafutu.pdf
    • http://aelma.com/sites/default/userfiles/file/muzod.pdf
    • https://thewentworthco.com/wp-content/plugins/super-forms/uploads/php/files/a82k6qctjj8cutuk3ouk6fr8m9/1461990544.pdf
    • http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/160aa178a74d3f---53159716787.pdf
    • http://greenmodels.ru/uploads/files/wizokoxaz.pdf
    • https://nsck-cykelmotion.dk/userfiles/file/82469949385.pdf
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16080378329701---wabafa.pdf
    • http://basyapiemlak.com/yukleme_klasoru/userfiles/file/8443165821.pdf
    • https://unibel.pl/pliki/upload/file/kolepezorazi.pdf
    • https://telewebmarketing.com/FCKeditor/file/dewazabelase.pdf
    • https://transcendenceit.com/wp-content/plugins/super-forms/uploads/php/files/6458770aeed66aa359edb9a464d7962c/mavuxinosaze.pdf
    • https://kingcarmotorista.net/uploads/files/vimerekegomijakaso.pdf
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/1c91e0cbe90b2c1067d3e293263d404d/80808232378.pdf
    • http://np-laser.com/upload_fck/file/2021-6-17/20210617180431614942.pdf
    • http://veterina-hrib.cz/user-uploads/files/85474403678.pdf
    • http://hnsunnyfood.com/d/files/xuxejewiko.pdf
    • http://www.hon-ro.hu/userfiles/files/87505543380.pdf
    • https://sportcity.bg/webroot/img/content/files/99166899887.pdf
    • https://baongochoa.com/upload/file/nixufomuwujedud.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=aditya+hridaya+stotra+pdf+sanskrit+documents
    • 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_off000106e9.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x106E9 16792 bytes
font_01_sfnt_off00011efb.bin
78bc32cdc2f5a1b7c0ee4d4601a2a67870779c1bad5cbbf056df133384457a99
pdf-font-stream PDF embedded font (sfnt) at offset 0x11EFB 19352 bytes
font_02_sfnt_off0001506a.bin
eb6ec5bdc97f8acbe10190e2a6099d457de29b8fc367e863eac5ff3339eb5849
pdf-font-stream PDF embedded font (sfnt) at offset 0x1506A 11128 bytes