Malicious PDF — malware analysis report

Static analysis result for SHA-256 1daa4681b1a06b60…

MALICIOUS

PDF

80.0 KB Created: 2021-09-08 02:08:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 60f78d42a2246ce000e9ab86cd68355a SHA-1: c86ea42d29c464ef925d2fdb6619837392fea7cf SHA-256: 1daa4681b1a06b60b64d391ff4c13e7e9245848da9496ee01e64beafef053027
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous external URLs, many of which are hosted on compromised websites or disposable domains, suggesting a link farm or phishing attempt. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the presence of external links points to an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

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://drafthe.ru/uplcv?utm_term=cara+membaca+hasil+uji+validitas+dan+reliabilitas+spss+pdf PDF link annotation
    • https://www.rockandroll.blog.br/wp-content/plugins/super-forms/uploads/php/files/7j5ucbj2mos79kv58s60qfa4lm/dorobozajimazaxalab.pdfIn PDF document text
    • http://fli.edu.mn/ckfinder/userfiles/files/derowupijapozuwos.pdfIn PDF document text
    • https://muachungbaohiem.com/uploads/userfiles/file/rulobikurudun.pdfIn PDF document text
    • http://opuspoint.com/ckfinder/userfiles/files/wowuwajulas.pdfIn PDF document text
    • https://e-fasteners.eu/media/file/47559358181.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/i3iq1mkck7ac0q9agntavoi96i/zegirefoka.pdfIn PDF document text
    • http://starsunited.at/upload/files/9973343453.pdfIn PDF document text
    • https://luathoanghuy.com/uploads/files/10838459227.pdfIn PDF document text
    • http://xn----8sbxab3abskk3a2j.xn--p1ai/media/file/bofugebawuginusiginan.pdfIn PDF document text
    • http://arslanemlak.come/file/bomad.pdfIn PDF document text
    • http://remproekt-m.ru/admin/ckfinder/userfiles/files/jereke.pdfIn PDF document text
    • https://www.wflorlando.com/wp-content/plugins/super-forms/uploads/php/files/9eb65521a9dec98c1db3d4ebefb0676d/90509036392.pdfIn PDF document text
    • http://argol-editions.fr/userfiles/file/84632164747.pdfIn PDF document text
    • http://impressivetravelvietnam.com/upload/files/39757524634.pdfIn PDF document text
    • https://teenvolunteer.org/wp-content/plugins/super-forms/uploads/php/files/bdb1616e0a4fcef41dd7b5885d16fbd6/wumadefokum.pdfIn PDF document text
    • https://kamber.dk/wp-content/plugins/super-forms/uploads/php/files/6190079eaf30bdc677bae3014e8122c0/jexozukugarovefubaki.pdfIn PDF document text
    • https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/160be13301b952---polegetof.pdfIn PDF document text
    • http://foto-klub.dk/userfiles/file/58423661560.pdfIn PDF document text
    • http://purofirstli.net/userfiles/file/purufonarare.pdfIn PDF document text
    • http://freewest.at/13877205450.pdfIn PDF document text
    • http://www.kickcommerce.com/userfiles/file/98585627499.pdfIn PDF document text
    • https://kisikana.hr/userfiles/file/16057654735.pdfIn PDF document text
    • https://luxartparquet.com/wp-content/plugins/super-forms/uploads/php/files/f3c1791a50cebea26b700c7f6c9a9b7f/zorukoxunazuzugokabivi.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_off0000d486.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD486 11232 bytes
SHA-256: 2e6c25e228791c4c26c4c0e1adeece4ea2bffc80840788525dbdf8c129656c58
font_01_sfnt_off0000ee6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE6B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001067d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1067D 16832 bytes
SHA-256: 49088509720d50f5b8c0deb3ca5e939ccb3daf37a3604d1b4c3d587567dcf75d

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