Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8b04ac465825444…

MALICIOUS

PDF

87.4 KB Created: 2021-09-06 04:26:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: b12ce97879cba6d854f633d4b1a36dd6 SHA-1: f57b6c7e08fc05c40136217e88e87772742a22ba SHA-256: a8b04ac4658254447a1240a77951c13542daae4d3cc3ab1a6bcf4981ccf70050
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript, which is often used to execute malicious code or redirect users to phishing sites. The presence of numerous links pointing to compromised websites and disposable hosting further suggests a malicious intent, likely for phishing or malware distribution. The ClamAV detection and ML classifier strongly indicate maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://wastran.ru/uplcv?utm_term=quran+tafseer+english+pdf+download PDF link annotation
    • https://communeouchamps.fr/userfiles/file/zojidosunuva.pdfIn PDF document text
    • http://www.gaviprintpack.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c073254d137---81701026241.pdfIn PDF document text
    • https://betonwerkendejonge.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16085c8796e499---rimuvupirujewuxogisuvuzi.pdfIn PDF document text
    • http://qzgyhs.com/Upload/file/69524424490.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610b38fd9de8d---bunelegefafazidasanig.pdfIn PDF document text
    • http://wagnerpc.com/userfiles/files/vigofusibagunurov.pdfIn PDF document text
    • https://rmdschoolandcollege.com/wp-content/plugins/super-forms/uploads/php/files/r2kslvjkg0vjh4jnr7f41pruv6/52058911294.pdfIn PDF document text
    • http://studiopignotti.it/userfiles/files/84307017723.pdfIn PDF document text
    • http://montagnobozzone.it/userfiles/files/50164692561.pdfIn PDF document text
    • https://www.tulsarad.com/my_content/js/ckfinder/userfiles/files/11448657701.pdfIn PDF document text
    • https://www.indee-r.fr/wp-content/plugins/super-forms/uploads/php/files/bddb2d7f492a5a9425ec09298754fd18/zipesoxazeronobipi.pdfIn PDF document text
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4c506c83a4---89262214288.pdfIn PDF document text
    • https://glbtrader.com/userfiles/file/76162691836.pdfIn PDF document text
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac2e5902d77---rodixixerebobezinisazevi.pdfIn PDF document text
    • https://leavingcare3plus.ch/userfiles/files/paxuzazivujulomorerumasek.pdfIn PDF document text
    • http://re-view.online/fckFiles/file/rowetagonin.pdfIn PDF document text
    • http://driver-jazda.pl/upload/file/26620779109.pdfIn PDF document text
    • https://www.emma-solutions.de/wp-content/plugins/formcraft/file-upload/server/content/files/160851645c8635---sifidowenoponoxilewunu.pdfIn PDF document text
    • https://gccpay.net/wp-content/plugins/super-forms/uploads/php/files/8e663a6c7686a3ae55fadd8bcdcbb567/fupuwepafafavisofatika.pdfIn PDF document text
    • http://ceskylakros.cz/userfiles/file/14451584193.pdfIn PDF document text
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f102497570a---52392172073.pdfIn PDF document text
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/16105974f1879c---10644246008.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/d80b4fdbe86fee89496e5d21c27ff923/baramijorefexugugiloteji.pdfIn PDF document text
    • http://zeguvietnam.com/uploads/ckfinder/files/69306379978.pdfIn PDF document text
    • http://countrysquirefoods.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3da13e9537---64863522206.pdfIn PDF document text
    • https://www.sodigital.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a90a98310ca---86608032954.pdfIn PDF document text
    • 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_off0000e9c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9C9 11020 bytes
SHA-256: a5cf1862265eb5c5501c45534511dea7cbc102acaf38353ba75e6f9a8daf6e81
font_01_sfnt_off0001033c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1033C 20060 bytes
SHA-256: fb41dad7506d8f42ecaace45b1648fb4a1a7e38926f959a7596e2ecf6c5a5f3c
font_02_sfnt_off000137ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137AD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1