Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ca5f1e397892962…

MALICIOUS

PDF

82.2 KB Created: 2021-08-10 11:56:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: bd865de5613e7d8ac57a50b3de36a6ab SHA-1: 55a37ea521499dc0e676234ff73460329fbc67e4 SHA-256: 7ca5f1e3978929621d6483da24d3e6ae868e442784a3ca081cb60d23acf9c9b7
156 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to lead users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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 http://forter.vn/hinhanh/file/wizowamamukawu.pdf In PDF document text
    • https://jiptv.nl/wp-content/plugins/super-forms/uploads/php/files/7vv2vr89cb8ge6ccnif40aumb4/kezov.pdfIn PDF document text
    • http://zulassungsdienst4you.de/bilder/file/48509499928.pdfIn PDF document text
    • https://leesman.com/wp-content/plugins/super-forms/uploads/php/files/b8310ebca7a7bc10b6ae032616a71263/pizujenubedaj.pdfIn PDF document text
    • http://anhuizhkj.com/upload_fck/file/2021-5-22/20210522130810696653.pdfIn PDF document text
    • http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/160c3d1182592d---6516164847.pdfIn PDF document text
    • https://antoinepanau.com/wp-content/plugins/super-forms/uploads/php/files/a4f433171fc9d26a9bc233cd5674546a/xutujijanorogama.pdfIn PDF document text
    • https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c0e5ee08859---lapirigemibizamuvolabe.pdfIn PDF document text
    • https://southernlightingsource.com/wp-content/plugins/super-forms/uploads/php/files/10aea01803f240e9c3cb7a5522805965/93742857916.pdfIn PDF document text
    • http://edu-family72.ru/content/images/uploads/file/46301339666.pdfIn PDF document text
    • https://www.newhorizonscrisiscenter.org/ckfinder/userfiles/files/tudokofizaga.pdfIn PDF document text
    • https://finestblogger.de/wp-content/plugins/super-forms/uploads/php/files/s2b46bfg6g186u3vm16o2k58v7/nurasuxibovosuposexepe.pdfIn PDF document text
    • https://bahceneryaman.net/public/content-images/files/18501645208.pdfIn PDF document text
    • https://retentionstudentexperience.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078ab511e11f---mizapamu.pdfIn PDF document text
    • https://ltgtrends.com/wp-content/plugins/super-forms/uploads/php/files/fbada1ed7a945f2322234bda1767d81b/firuriruzazakonoruneg.pdfIn PDF document text
    • http://siciny.pl/userfiles/file/labokukodesipel.pdfIn PDF document text
    • https://rubin2000-distribuitorshop.ro/userfiles/file/muvobu.pdfIn PDF document text
    • http://www.peritaonline.es/ckfinder/userfiles/files/faxomutoruxokilonasitupu.pdfIn PDF document text
    • http://www.maarsehoveniers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16077ebd824020---56347951406.pdfIn PDF document text
    • http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/1609cb8c4b44fd---gotevetodixejaboruri.pdfIn PDF document text
    • http://zawayakw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f411a1c805---23001583590.pdfIn PDF document text
    • https://pcparts.fr/ckfinder/userfiles/files/72092395551.pdfIn PDF document text
    • https://securitydm.com/slicice/file/51127738695.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=goedkoop+bestelbus+kopenPDF 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_off0000df6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF6D 10404 bytes
SHA-256: e3f674d64a31a3759f9c511d9814b3b2d28552ba038aa8b81be36b27e99d674c
font_01_sfnt_off0000f6e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6E9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010efb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EFB 17072 bytes
SHA-256: 542728afc17d16a0980a81379dfea9e891e935f70b7750857e0c6ad752b3257e

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