Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0d02c1ef75290f7…

MALICIOUS

PDF

88.4 KB Created: 2021-07-02 13:49:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 1454272d11042a82f5bd28c5fe511a4e SHA-1: a7b9653caecb9f47c484499f523f03067fc7f761 SHA-256: d0d02c1ef75290f70bebf8f7c4f3688f9687368e3f82ff1a280d17d9c2d93522
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, and exhibits characteristics of a link farm pointing to compromised CMS upload storage. The PDF contains numerous embedded URLs, many of which lead to suspicious domains or known compromised sites, suggesting an attempt to redirect users to malicious content. No scripts were extracted, but the overall structure and URL distribution indicate a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9822

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/16075f4d509a39---fakusunadaviwope.pdf In PDF document text
    • http://merwepizza.com/upload/file/96311829893.pdfIn PDF document text
    • http://bellina.pl/userfiles/file/84438239446.pdfIn PDF document text
    • https://www.aserspa.net/wp-content/plugins/super-forms/uploads/php/files/snb3fk2kn02g258iu8cjb1o868/61125986667.pdfIn PDF document text
    • https://www.partyshuttlebus.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160bfd9d117fa2---42341639222.pdfIn PDF document text
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b16b3f6dbc3---musukonofevifukikije.pdfIn PDF document text
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/7c1413ee34206700b22a56792abd8c63/95760303402.pdfIn PDF document text
    • http://nutronicltd.com/userfiles/file/lovufurarufegos.pdfIn PDF document text
    • https://ceilford.org/wp-content/plugins/super-forms/uploads/php/files/10c107afa8020b17f417c1c8e9db6a1a/73855344356.pdfIn PDF document text
    • https://forex-robo.org/wp-content/plugins/super-forms/uploads/php/files/7001c81b48fa768aea2b99a3190cbbac/mikawet.pdfIn PDF document text
    • http://subventionsbetrug.de/wp-content/plugins/super-forms/uploads/php/files/5pok3gkffnn02mrm4cvduvg81d/satotaxonesobukutumi.pdfIn PDF document text
    • http://www.drop-lok.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608358e954cc5---73454216346.pdfIn PDF document text
    • https://suacuacuontoanphat.com/upload/files/44821344150.pdfIn PDF document text
    • https://www.webhisto.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160ac6b0dc299e---latetawawot.pdfIn PDF document text
    • http://aleeblog.com/wp-content/plugins/super-forms/uploads/php/files/veajcmh45umvstfu6kvgc6fsg7/66415934817.pdfIn PDF document text
    • http://alpanelektrik.com/depo/sayfaresim/file/24191728575.pdfIn PDF document text
    • http://provia-events.de/pics/fotos/1/file/fexefojofuwew.pdfIn PDF document text
    • https://socialchangefactory.org/wp-content/plugins/super-forms/uploads/php/files/2204dd0af4661cb0171d17a8ff4d5122/wilamamonaramupuvavinat.pdfIn PDF document text
    • https://thegioidongphuc.net/ckfinder/userfiles/files/lalexorizejozamogefa.pdfIn PDF document text
    • http://shuswapladystriders.ca/userfiles/file/90201557937.pdfIn PDF document text
    • https://bursakaynak.com/userfiles/file/30747243876.pdfIn PDF document text
    • http://criminisiepartners.it/userfiles/files/80738739146.pdfIn PDF document text
    • http://mexvp.com/ckfinder/userfiles/files/63767278250.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/1fb6916ed9dde3f55ac607e9cf4ba1df/toredemidone.pdfIn PDF document text
    • http://studiodabo.eu/userfiles/files/84786846147.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/tcmcpl5hpqob3gqi2k0ui9466n/bazab.pdfIn PDF document text
    • http://msci.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/1607d3b260bafc---xisutanerevalup.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=need+for+speed+most+wanted+ps3+downloadPDF 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
stream_003_off00010d5c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x10D5C 17688 bytes
SHA-256: 79bfc205a90e91f0d559995addb2b1f51d9ab7958f3a47b6687f88023f48ec30
font_00_sfnt_off0000f45c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF45C 10800 bytes
SHA-256: 4466a9cd21705ec2c89b5af5958d481d5c36a8710a0feab658808af1a281f3f9
font_02_sfnt_off00013bbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13BBD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1