Malicious PDF — malware analysis report

Static analysis result for SHA-256 49edb69a0f00a484…

MALICIOUS

PDF

86.1 KB Created: 2021-07-16 10:48:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 2ec39e683fecbef9590c40a762dc0023 SHA-1: 918dc2811716ea4f53b688b99fd9c10bf5ecaf68 SHA-256: 49edb69a0f00a48441ee87ec8fcd09555a91a7bd1d6976b50f67fa504c81971b
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://pistant.ru/uplcv?utm_term=4+syllable+words+adjectives
    • https://accuratesearch.com/userfiles/file/durirefi.pdf
    • http://onnetsolution.in/userfiles/file/sesositorulesakokavomamak.pdf
    • https://www.emma-solutions.de/wp-content/plugins/formcraft/file-upload/server/content/files/16092bae5484f0---90078154908.pdf
    • https://riolospettacoli.it/filesUploads/file/54326835180.pdf
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/160944c3e70720---safinevifagujozik.pdf
    • http://haki.vn/uploads/files/19550796156.pdf
    • http://www.annaleehuber.com/content_files/file/86601047166.pdf
    • http://vtvxm.vn/userfiles/file/93890712001.pdf
    • http://xn----8sbosgn1al9i.xn--p1ai/ckfinder/userfiles/files/tudox.pdf
    • http://all-pass.com/folder/editor/file/34374950554.pdf
    • https://fotobolfestmeny.hu/mvc/userfiles/file/fuxeratomomulabefomevubow.pdf
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/c4phiur5trf6t6utfbspftu2kj/89025128717.pdf
    • http://www.unidacardoso.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609ec4b60f2b9---37887630878.pdf
    • http://xn--d1achljw0b.xn--p1ai/content/upload/pexofemirosanakoxinumoxeg.pdf
    • https://braviengenharia.com.br/wp-content/plugins/super-forms/uploads/php/files/f1e86l8srosuh578fckk5bdv8q/28770925303.pdf
    • http://secretlove.ch/ckfinder/userfiles/files/93036058858.pdf
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a17ce33cc18---77357371622.pdf
    • http://nm-union.ru/ckfinder/userfiles/files/2409778364.pdf
    • http://billedbutikken.dk/articlefiles/file/bimudozilizanogikulagi.pdf
    • https://baongochoa.com/upload/file/8507973368.pdf
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16078ded270d7b---95422013919.pdf
    • https://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083a4fd0d093---86205936341.pdf
    • http://vitaminyplus.eu/files/file/47765064545.pdf
    • https://blackknowledge.com/wp-content/plugins/super-forms/uploads/php/files/c145c9689caac9f25cbea9b00191b0e4/fidijupapepefu.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb6d.bin
7003db336750969a828862d2b6b131d65f3a166e9e79fbb357709131c7f3299a
pdf-font-stream PDF embedded font (sfnt) at offset 0xEB6D 10776 bytes
font_01_sfnt_off00010471.bin
caa30b2213a7738060187dadb1383a33c5333ff04f09853ed4aa61f1db861e5d
pdf-font-stream PDF embedded font (sfnt) at offset 0x10471 17812 bytes
font_02_sfnt_off000132ec.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x132EC 16792 bytes