Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f0465ef620a9d31…

MALICIOUS

PDF

126.1 KB Created: 2021-06-29 04:11:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: edba3b5325ba3e228821a110e66e932f SHA-1: 6bf74540973dab2abf0074223a0f89ab1935f533 SHA-256: 7f0465ef620a9d3111d5abbbab0805485a366b0b71304f38a8ef6c9f50793980
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and a machine learning classifier. It functions as a link farm, containing numerous URLs that point to compromised CMS upload storage and disposable hosting. The primary purpose appears to be directing users to external, potentially malicious content, which is a common phishing or malware distribution tactic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9928

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 http://africanhairbraidingsalon.com/userfiles/file/48212623170.pdf In PDF document text
    • https://dipinkrishna.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a08523f1df9---pizivixirinakarodu.pdfIn PDF document text
    • http://iwish-cosmetics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afe19b90889---49168446186.pdfIn PDF document text
    • http://socialbomjesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/16079457294752---77301361245.pdfIn PDF document text
    • https://www.lokalesichtbarkeit.de/wp-content/plugins/super-forms/uploads/php/files/8rff1p1ehruqr5e3ch7ffc4sfr/76071280006.pdfIn PDF document text
    • http://tavernadelsnoguers.com/wp-content/plugins/super-forms/uploads/php/files/ce85e2f615f7e64bbfa0fe0323f5c62f/74494838956.pdfIn PDF document text
    • https://oknoplus-omsk.ru/wp-content/plugins/super-forms/uploads/php/files/041c39e8a8106b67b3358543c6f03170/41986574758.pdfIn PDF document text
    • http://rolmech-strzelno.pl/Upload/file/jawuwisudox.pdfIn PDF document text
    • http://www.aluvascientific.com/UserFiles/file/jabinetov.pdfIn PDF document text
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/160bd1a533df8c---juvojefevoxare.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/hb9lc01v2hnq4ct9t2jejjfam0/bapalaz.pdfIn PDF document text
    • http://okmarin.ru/userfiles/file/54729593850.pdfIn PDF document text
    • https://micast.de/wp-content/plugins/super-forms/uploads/php/files/ogkmuufdbq1kqsboi3uojbk268/26103005596.pdfIn PDF document text
    • https://glbtrader.com/userfiles/file/35690003847.pdfIn PDF document text
    • http://www.fotografoeventimilano.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cfd2dd0f358---2836103794.pdfIn PDF document text
    • http://yatros.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16077204ead9e6---93084492349.pdfIn PDF document text
    • http://angarakshaksecurity.com/userfiles/file/fetemad.pdfIn PDF document text
    • http://counterreaction.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c29fddd482d---vutubuxabomesom.pdfIn PDF document text
    • https://amursvoidom.ru/media/files/zaberuwodujexawof.pdfIn PDF document text
    • http://hvpeds.com/upload/contents/file/tazubuxut.pdfIn PDF document text
    • https://prosegik.com/wp-content/plugins/super-forms/uploads/php/files/2d76c58fbb4808f3b87ce529d8a14aeb/jikive.pdfIn PDF document text
    • http://chinalabware.es/d/files/42806759045.pdfIn PDF document text
    • http://hpc1970reunion.com/clients/3/3e/3eb4c5728feca7eb79feed4eed44c519/File/legusurunuvifaxaku.pdfIn PDF document text
    • https://www.diktu.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608244af00266---dufuwukuxawulapexe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=the+addams+family+values+scriptPDF 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_off00018f7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18F7F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001a796.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A796 10904 bytes
SHA-256: 230feec699141ab7014be66180fdd787b0d4da9b6ea30ac1717f41c840c3c748
font_02_sfnt_off0001c0d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C0D2 16468 bytes
SHA-256: 17c7f502f0b4150e8864971efcecc214b8ed02436285699dbafdc4fbe42a47e0