Malicious PDF — malware analysis report

Static analysis result for SHA-256 575c10ddc6495935…

MALICIOUS

PDF

109.2 KB Created: 2021-07-03 09:57:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: aa2585d8bad4d3a5c7c4d9be1b51a0b0 SHA-1: e6caaff2595be1275d8cce8d115b8360d9bf5d7a SHA-256: 575c10ddc649593581c5c46553311268ce0d0b398746d49b03b7a58eeb97eb58
156 Risk Score

Malware Insights

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

The sample is identified as malicious by ClamAV and an ML classifier, and exhibits characteristics of a link farm. It contains numerous URLs pointing to compromised WordPress upload directories, suggesting an attempt to redirect users to malicious content or phishing pages. The presence of multiple distinct hosts and the use of 'utm_term' parameters indicate a coordinated effort to distribute malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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://thejasmineway.net/wp-content/plugins/super-forms/uploads/php/files/u1lcn7gksmnq5399a9k9tgb4s6/66353473834.pdf In PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/505d4cf53aa80731fd50f041dbdbdccf/ledutepibuxufeguwu.pdfIn PDF document text
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/34787cd58b2194604fa7c0c0e093f9ff/29016803551.pdfIn PDF document text
    • https://vaytieudungtragop.com.vn/wp-content/plugins/super-forms/uploads/php/files/31vm394o5pq4j4pugrj8ani5et/wesobavisigose.pdfIn PDF document text
    • https://transcendenceit.com/wp-content/plugins/super-forms/uploads/php/files/1cee060a16d755b71407289b19a96f99/kufelitoxutabunijewomi.pdfIn PDF document text
    • http://asirius.su/wp-content/plugins/super-forms/uploads/php/files/eff4db440cd143293d9002cf1c362b84/31201414952.pdfIn PDF document text
    • https://daleel.global/wp-content/plugins/super-forms/uploads/php/files/eas8i7pii9dr43va1obk8b0t45/mafadagidisas.pdfIn PDF document text
    • https://hpx.com.ua/wp-content/plugins/super-forms/uploads/php/files/badfa50ebe1b6174796e8670827e1708/64495928462.pdfIn PDF document text
    • http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c45e3d50fd1---kubetodemivizifuzur.pdfIn PDF document text
    • https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/98439403dc6b8e750438f828ca6473b2/97013562628.pdfIn PDF document text
    • http://driver-jazda.pl/upload/file/85175278011.pdfIn PDF document text
    • http://unseenadventure.com/userfiles/file/72426429971.pdfIn PDF document text
    • https://www.shopveriamici.com/wp-content/plugins/super-forms/uploads/php/files/b1fojicfn5l7rva3a90t9erp8f/56839963174.pdfIn PDF document text
    • http://ahxxzx.com/userfiles/202104/file/57244924683.pdfIn PDF document text
    • http://iwish-cosmetics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d18d17971d---57451464176.pdfIn PDF document text
    • http://thegroverestaurantnj.com/userfiles/files/85933075941.pdfIn PDF document text
    • http://www.putnamtaxi.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608292de5d390---zijasalonuwuxeleludad.pdfIn PDF document text
    • https://choiceenergynetwork.com/wp-content/plugins/super-forms/uploads/php/files/3c9b11c53337bbceeab92e78b5d2a644/96474473349.pdfIn PDF document text
    • https://ketgate.eu/wp-content/plugins/super-forms/uploads/php/files/7ac1e03cf5725601d93a83433f35e6fa/gazatobitira.pdfIn PDF document text
    • http://pcccmiennam.com/media/ftp/file/53026969600.pdfIn PDF document text
    • http://becro-plast.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160cae6bbad7d2---16184364416.pdfIn PDF document text
    • https://ankaratemizlikcim.com/depo/sayfaresim/file/wiloloz.pdfIn PDF document text
    • https://gfow.om/wp-content/plugins/super-forms/uploads/php/files/lh6egan0603kpbvquf8p5hsrjp/weronak.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=rich+dad+poor+dad+guide+to+investing+pdfPDF 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_off00014791.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14791 17636 bytes
SHA-256: 17f4d508601aab41599f2bfd7d3bf32da3e858edb5d20ac5606f9ec2e99db21c
font_01_sfnt_off000175a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x175A4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00018dbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18DBB 11064 bytes
SHA-256: 333adf5a9a853c2c6d22451ca040a1c9526664eed3c74f7bcfa664cd55c16d2f

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