Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b63f5427251f9cd…

MALICIOUS

PDF

89.7 KB Created: 2021-08-13 06:29:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-16
MD5: 0181c5d27db6ce23244744d5ed2330a1 SHA-1: 07c142fd75a2ddffab5a1fa4953dcaaf30f47b01 SHA-256: 5b63f5427251f9cd899c2006132feae980d26baa7acff5c2c268a3261251d3d6
156 Risk Score

Malware Insights

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

This PDF was flagged by multiple heuristics as containing a link farm pointing to potentially compromised WordPress sites and disposable hosting. The ML classifier and ClamAV also identified it as malicious, specifically as a phishing trojan. The embedded URLs are designed to redirect users to external sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 6

  • 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.
  • 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://www.idromeccanicasrl.com/idromeccanicasrl.com/wp-content/plugins/super-forms/uploads/php/files/05edb68e89f6a0aa30c0b34478a32eaf/juvexomuworemuke.pdf In PDF document text
    • https://www.autodepotperformancegroup.ca/wp-content/plugins/super-forms/uploads/php/files/cvp863q584j607s6uph39fru9e/jivuw.pdfIn PDF document text
    • http://myphamlulanjina.com/upload/files/50124512750.pdfIn PDF document text
    • https://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f833baeddee---tofotuweded.pdfIn PDF document text
    • http://www.ambredore.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098be5066ba2---54506720140.pdfIn PDF document text
    • https://sfeerweter.nl/userfiles/files/wulapurufe.pdfIn PDF document text
    • http://secretlove.ch/ckfinder/userfiles/files/fukexudagoralo.pdfIn PDF document text
    • http://www.tsssport.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607278db4047a---jemagowosu.pdfIn PDF document text
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ed5bb52a60---33952549336.pdfIn PDF document text
    • https://hantverkarenisandby.se/UserFiles/files/51653443383.pdfIn PDF document text
    • http://aldara-latinoamerica.com/userfiles/file/87224621475.pdfIn PDF document text
    • http://www.alfainstal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160b689c2097d9---solepe.pdfIn PDF document text
    • https://monuments-msk.ru/wp-content/plugins/super-forms/uploads/php/files/86773912d32770f159feabda9f075b05/11673079423.pdfIn PDF document text
    • http://blueyee.com/upload/file/230356289956.pdfIn PDF document text
    • https://praward.tw/wp-content/plugins/super-forms/uploads/php/files/d111c31bce5cc5fc76689214959404be/94477257092.pdfIn PDF document text
    • http://mkngsp.ru/upload/files/fokogimutosezovibutup.pdfIn PDF document text
    • https://smarttactic.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c6d90a1f565---50184308831.pdfIn PDF document text
    • http://wooshin.kr/uploaded/file/38724610960c8d1ac9c566.pdfIn PDF document text
    • http://transbur.ru/admin/ckfinder/userfiles/files/kaluwudopizezijo.pdfIn PDF document text
    • http://hephatha100.com/clients/4/45/452f9a9cd3514f90eb92b3b4734a1f1d/File/56324670886.pdfIn PDF document text
    • https://www.hermanosvalerorecio.com//ckfinder/userfiles/files/guvoburirukuwolip.pdfIn PDF document text
    • https://trunglamdecor.com/uploads/userfiles/file/89241055534.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=feuille+avec+ligne+pour+ecrire+droitPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f915.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF915 18212 bytes
SHA-256: ac5fd662d80e71c7706cee661f0c4d2667f6f19cf53b5b183179818ad4f86ac1
font_01_sfnt_off00012621.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12621 10664 bytes
SHA-256: 0db62f115e1b358c089340f8dd147d542b443d0d4eb054448bdea8d82de77cea
font_02_sfnt_off00013e73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E73 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.