Malicious PDF — malware analysis report

Static analysis result for SHA-256 afc08bbcf4ce830a…

MALICIOUS

PDF

72.5 KB Created: 2021-09-11 12:45:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: dbc07c0da9dc4a1f007ae0cb63798071 SHA-1: 0750d0ec6496ad6ecf0aee865190078ce457c17d SHA-256: afc08bbcf4ce830a796adf423c484a7f29db989b4e40a209f9db88f0669ae436
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many of which are hosted on disposable domains and appear to be part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware delivery. While no scripts were explicitly extracted, the PDF structure and external URI firings suggest it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://crysiq.ru/uplcv?utm_term=radians+to+decimal+degrees PDF link annotation
    • http://elencostruzioni.it/userfiles/files/xamigotafubazusaw.pdfIn PDF document text
    • https://tarsiman.ee/files/file/48831913099.pdfIn PDF document text
    • https://vinasimex.com/uploads/file/xetavawobakaziseluf.pdfIn PDF document text
    • http://cancunday.com/travela/img/files/64996221778.pdfIn PDF document text
    • https://stratasphere.online/userfiles/file/kawep.pdfIn PDF document text
    • https://theelementrama9.com/userfiles/files/56526131015.pdfIn PDF document text
    • https://centrumschoolka.pl/photos/file/zuleriti.pdfIn PDF document text
    • https://alpinashop.rudy-ra.com/files/xogofitawudewujalopovelam.pdfIn PDF document text
    • http://hongsung114.com/files/fckeditor/file/54123213582.pdfIn PDF document text
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/161333d557173f---39718479552.pdfIn PDF document text
    • http://traslochimontalto.it/userfiles/files/75133978740.pdfIn PDF document text
    • https://digicpictures.com/downloads/11126794367.pdfIn PDF document text
    • http://fence-alarm.com/userfiles/files/32026227502.pdfIn PDF document text
    • http://korea-labels.com/ckfinder/userfiles/files/14477130467.pdfIn PDF document text
    • http://lotuscourtpune.com/wp-content/plugins/super-forms/uploads/php/files/fa245797c02f663b6f9574dc7d411927/32174566850.pdfIn PDF document text
    • http://ever0036.com/assets/uploads/ckedit/files/20210904070024.pdfIn PDF document text
    • http://telegid.tv/userfiles/file/satimeguxuterapo.pdfIn PDF document text
    • https://namratalakhotia.com/userfiles/files/57226685953.pdfIn PDF document text
    • http://dongbanja.com/userData/ebizro_board/file/kepovagogufan.pdfIn PDF document text
    • https://maggies-handmade.com/UserFiles/files/58764057310.pdfIn PDF document text
    • https://shoppingplanet.cityplanet.ro/ckfinder/userfiles/files/xugebirotabor.pdfIn PDF document text
    • http://delta-serwis.pl/pliki/56721929082.pdfIn PDF document text
    • http://agierresrl.it/userfiles/files/botaketizavo.pdfIn PDF document text
    • https://karatenarrewarren.com.au/ckfinder/userfiles/files/mekexekotigi.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_off0000b9e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB9E4 16464 bytes
SHA-256: 766146e95d6c7712e36ca331552bad61f8c84c960d1e15abda1146be00f00ea0
font_01_sfnt_off0000e3af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3AF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fbc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBC6 10760 bytes
SHA-256: 77a27efc23e52e791a4f704928683655f9b25f112ec1fa18ae1cfb51ed92dccb

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