Malicious PDF — malware analysis report

Static analysis result for SHA-256 94497c347de39d40…

MALICIOUS

PDF

72.6 KB Created: 2021-07-01 16:32:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 72aeea71bbae2ded57f46ccb099d2ae3 SHA-1: ec25e29eb661b5e66e2430f4d800e87d17fbd14d SHA-256: 94497c347de39d408d2c761fdf22498bca26463768c4a46f2cda472873dd086a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The file contains a link farm pointing to numerous distinct hosts, many of which appear to be compromised WordPress installations used for hosting PDF files. The ML classifier also strongly indicated maliciousness. While no scripts were explicitly extracted, the structure and URL patterns suggest an intent to lure users to external sites, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://funkydrop.shop/wp-content/plugins/super-forms/uploads/php/files/6dc0658ff95883848c413d244a3c777f/serukidazufuju.pdf
    • http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079c9eeacc9c---72894509487.pdf
    • http://vssteel1999.com/ckeditor/userfiles/files/7169112911.pdf
    • https://bucatariizidite.ro/printuri-fi/files/84930481954.pdf
    • https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16092409fc6561---52962575416.pdf
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070d76c18789---dazevoserabusubufufuma.pdf
    • http://vladjurnalist.ru/archive/file/63766321981.pdf
    • https://actioncoach.com.my/wp-content/plugins/formcraft/file-upload/server/content/files/16074216183d06---9027256516.pdf
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082005780eca---zumopuja.pdf
    • https://www.plsok.com/wp-content/plugins/super-forms/uploads/php/files/a57471476865081440408de3bc6068bd/puludarenivej.pdf
    • http://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160923737d8283---50271726040.pdf
    • https://ludbaegitim.com/calisma2/files/uploads/dagovesepinovigotupip.pdf
    • http://agrion.org/upload/fichier/75068872063.pdf
    • https://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/i852kjukrv8ro65im5qoepo8c6/zokijumosemejinudigaguro.pdf
    • https://bladmedyczny24.pl/wp-content/plugins/super-forms/uploads/php/files/1f784a097ec2c56aee51710ef4e4479a/direlasipadawulonuzupugaj.pdf
    • http://i-daa-wl.de/userfiles/78829143317.pdf
    • https://finestblogger.de/wp-content/plugins/super-forms/uploads/php/files/r2kat1643hpi3u8vlkvclj29c8/ruzomumesixigadudot.pdf
    • https://www.budgetskemaet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160c55b3024c79---43187528320.pdf
    • http://www.sport-konyv.hu/userfiles/file/beterelagexab.pdf
    • http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609edec7a5b13---zavojerobibesu.pdf
    • http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a25c44b6453---12961622273.pdf
    • http://acecaalcoy.com/userfiles/file/16314927525.pdf
    • http://c2mag.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098b8352962b---1712688409.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=prolonged+aptt+with+normal+pt
    • 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_off0000bc1e.bin
d2fb139bd0b2fd19781752c02c801c2e90499c7eca0c6a408fe350685c6ddbc3
pdf-font-stream PDF embedded font (sfnt) at offset 0xBC1E 15804 bytes
font_01_sfnt_off0000e4e3.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE4E3 16792 bytes
font_02_sfnt_off0000fcfa.bin
6b0b8019b37a6516dfadba262128456ad76b887fbf2728504cc1aafc4e78dde3
pdf-font-stream PDF embedded font (sfnt) at offset 0xFCFA 10756 bytes