Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e4622760774719b…

MALICIOUS

PDF

81.0 KB Created: 2021-07-24 19:29:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: 1b09381e02af96843628743c9f33382a SHA-1: 5cb6692b952eb3a7578378d11a66325ce68865d7 SHA-256: 7e4622760774719bb39485edac696158f085ce39e512f7beb3acafae0d92e20d
96 Risk Score

Malware Insights

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

The PDF file contains a link farm, with numerous embedded URLs pointing to compromised WordPress sites. The ML classifier strongly indicates maliciousness, and the heuristic firings suggest the document is designed to redirect users to potentially harmful content or further malware. No scripts were extracted, limiting the analysis of direct execution capabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 5

  • 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://advancedcheckcashadvance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a603beeadda---xaxenunoxapuwopavub.pdf In PDF document text
    • http://www.kmclogistics.com/wp-content/plugins/super-forms/uploads/php/files/ac10bee260ae1f1c21d6fca68366306a/65469923104.pdfIn PDF document text
    • https://pyhm.ca/wp-content/plugins/super-forms/uploads/php/files/rpq0jmp04l83nnsdcc73sigic4/vapakoloxigug.pdfIn PDF document text
    • http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ed283a0aa9---jeledafubogon.pdfIn PDF document text
    • http://majorpropertygroup.com/userfiles/files/delutogupomime.pdfIn PDF document text
    • https://addsfly.com/userfiles/file/32590448937.pdfIn PDF document text
    • https://www.ideakliniksisli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607071d601f15---fapavidiwudofog.pdfIn PDF document text
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608be62034d7c---fevetodibaketa.pdfIn PDF document text
    • https://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/160df8b2d9d462---40874702600.pdfIn PDF document text
    • http://phenix-security.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16083d50729c93---10957467903.pdfIn PDF document text
    • http://ankurgroups.com/userfiles/file/11210826969.pdfIn PDF document text
    • https://iqmuseum.mn/uploads/files/83827490260.pdfIn PDF document text
    • http://www.tsssport.com/wp-content/plugins/formcraft/file-upload/server/content/files/160711cfdbf45f---52890920277.pdfIn PDF document text
    • http://www.moyekolodin.com/files/lupogelov.pdfIn PDF document text
    • http://microcement.ua/userfiles/file/10213578864.pdfIn PDF document text
    • https://www.napariverinn.com/wp-content/plugins/super-forms/uploads/php/files/5efd1b9b6df50d8caa35a4f490f5419c/petopovoviserirof.pdfIn PDF document text
    • http://lungtransplantopen.com/clients/d/de/de7cc03d42bda6b8b84c8ac9728529bb/File/74266150603.pdfIn PDF document text
    • http://energo-winstal.pl/userfiles/file/56288711626.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160771e393b3e1---60537965414.pdfIn PDF document text
    • http://eko-inwest.eu/upload/file/48927092295.pdfIn PDF document text
    • http://weilandensemble.nl/ckfinder/userfiles/files/jopubikexejubomobewure.pdfIn PDF document text
    • https://travelselection.us/wp-content/plugins/formcraft/file-upload/server/content/files/160776ca78428e---tobupefaxerakivizif.pdfIn PDF document text
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d249f77388---44772488308.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=fireboy+and+watergirl+light+temple+unblocked+cool+math+gamesPDF 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_off0000db39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB39 15424 bytes
SHA-256: 317c5d22fa3a39bdf7307eba0588d8e6d7a1c91029785e71818524efd3a334de
font_01_sfnt_off00010151.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10151 11468 bytes
SHA-256: a1ed0bd65064792a4f46fd590489aaba07d34d1381c80da60906d445c682dcd7
font_02_sfnt_off00011be3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BE3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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