Malicious PDF — malware analysis report

Static analysis result for SHA-256 fad5f714759bcb73…

MALICIOUS

PDF

85.2 KB Created: 2021-09-12 05:01:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 9cd4f6dc28a1b2f61f9a0b5a89b1fabc SHA-1: de0af8017c9f9fb4d4d8b38bd99745f5d4e6af6d SHA-256: fad5f714759bcb7316c6c46da9f330b277b5396687ffb984f501ed50068af92c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a link farm pointing to compromised CMS uploads and disposable hosting. The ML classifier and ClamAV also identified it as a phishing trojan. While no scripts were extracted, the presence of numerous external links suggests an attempt to redirect the user to malicious sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9849

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://vienhung.com/webroot/img/files/sojusisagurawujeboduji.pdf In PDF document text
    • https://www.traveltimevipp.com/wp-content/plugins/super-forms/uploads/php/files/25220a30ceb4888213f669b439d37029/wusowupisivogizilubapiwer.pdfIn PDF document text
    • http://corporatiegids.nl/uploads/files/6074521938.pdfIn PDF document text
    • http://avsa.org/sites/default/files/images/files/zazezepexine.pdfIn PDF document text
    • http://cermak-expo.cz/data/files/file/zafekiliwenogofiganalas.pdfIn PDF document text
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133998f022f9---45171574510.pdfIn PDF document text
    • http://millecolori.it/images/file/sonosafuvuruvizixizojam.pdfIn PDF document text
    • https://nayyaralidada.net/alpha/ckfinder/userfiles/files/53181574020.pdfIn PDF document text
    • https://anninhsieuthi.online/upload/files/digeteme.pdfIn PDF document text
    • https://cs-nippon-cp.com/mailmagazine/upload/files/74440548911.pdfIn PDF document text
    • http://abpaluso.com/upload/file/sulelirigutaguretunagoval.pdfIn PDF document text
    • https://implantsdentairesdesmoulins.com/upload/editor/file/rizuwi.pdfIn PDF document text
    • http://jnnycc.org/userfiles/file/36350810701.pdfIn PDF document text
    • https://floridainvestment.cz/files/file/89075652327.pdfIn PDF document text
    • http://thessalonikiflights.com/files/files/zavipotadegevuwutozinab.pdfIn PDF document text
    • http://szm.hu/userfiles/file/xugudizopama.pdfIn PDF document text
    • http://dalnoboy.net/data/filestorage/upload/files/sikomivobo.pdfIn PDF document text
    • http://randoquad72.fr/userfiles/file/74188338742.pdfIn PDF document text
    • http://mcenterdk.ru/fck_editor_files/files/39509029927.pdfIn PDF document text
    • http://cnsgawefgl.netsociality.com/upload/files/zomudotajekuwuwasefefu.pdfIn PDF document text
    • https://drrajanmahtani.com/userfiles/files/vimivejuwefozinuwi.pdfIn PDF document text
    • http://www.alfainstal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16137d2345a74b---laluzisoge.pdfIn PDF document text
    • https://www.shopveriamici.com/wp-content/plugins/super-forms/uploads/php/files/hc3g1t734qlg27fob4c8v4oign/63075432295.pdfIn PDF document text
    • http://ytovietnam.net/ckfinder/userfiles/files/xugunejevalipigefosejug.pdfIn PDF document text
    • https://classconnbio.com/img-jacson/files/xilepisuwim.pdfIn PDF document text
    • http://milkexim.ru/imgeditor/file/20879275739.pdfIn PDF document text
    • https://7mark3t2-7aya.com/contents/files/56618099233.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=a+town+with+an+ocean+view+violin+sheet+musicPDF 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_off0000e1da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1DA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f9f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9F1 10628 bytes
SHA-256: 7ff5cd1be5e8abe050d2f67a5632214bdf97022f367c93f4d9a2560750056232
font_02_sfnt_off00011228.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11228 19832 bytes
SHA-256: 5c33a804549d18dfd831b999ab6707b6fdf8644b55b93afbc17eb9ab5b22fe2e

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