Malicious PDF — malware analysis report

Static analysis result for SHA-256 3dae600c18030273…

MALICIOUS

PDF

125.6 KB Created: 2021-07-02 08:11:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 05c339d001a90add9bcf27b4e2c8651e SHA-1: 262a3052cf18ff5cfee744a865fe7e95bf10ff28 SHA-256: 3dae600c18030273b2ae1f030918f4719daaf9ce9ef6d64f8fd8de8f397ea23c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the structure and URL analysis point towards a phishing or exploit delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9891

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 http://www.supercarrentalsofmiami.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608874cd0dc06---39115337944.pdf
    • http://medica-eg.com/userfiles/file/47099037281.pdf
    • https://mattweidnerlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d3a431008b---11646696779.pdf
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608146ff7b725---povegopebuvi.pdf
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160aa4ab356f77---47289449590.pdf
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/0n3apa4b8ta3249gdo3238ub15/godegutujawaxijomoju.pdf
    • https://formapolis.it/wp-content/plugins/super-forms/uploads/php/files/507f387acf5b4e26dd06c7bc6842a1a1/45602302479.pdf
    • http://gentlemensquartersbarbershop.com/wp-content/plugins/super-forms/uploads/php/files/56794515d8f202554e082921a504186f/mojinureke.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3d4f536714---93327962620.pdf
    • http://arci-mp.fr/admin/File/febevasezam.pdf
    • https://p87.hu/files/boxalonusetexepujor.pdf
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/f21f7a9fe29a0710178cbf192d333c26/40935542353.pdf
    • https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/160bde198d05a1---kujugawifopew.pdf
    • https://completecollegestrategies.com/wp-content/plugins/super-forms/uploads/php/files/ec74614ae2017f9bae32f9c7271d7897/wudirekav.pdf
    • https://study-go.info/wp-content/plugins/super-forms/uploads/php/files/24bdf672d5f7ecc310d8f680ce0f8cb8/zowesekigujik.pdf
    • http://grgct.com/ckfinder/userfiles/files/juberakozeguwomisupar.pdf
    • https://graffitipaintstudio.com/wp-content/plugins/super-forms/uploads/php/files/569238def6e37c197383a1c62342ab56/4957644395.pdf
    • http://bioident.pl/photos_fck/file/boluk.pdf
    • http://www.christinemartin.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16092b9a34bcf0---lupuzoliwodowumerim.pdf
    • https://www.lang-mayer.de/wp-content/plugins/formcraft/file-upload/server/content/files/160aa024374836---feroma.pdf
    • http://ingenermarket.ru/userfiles/fagidiruzidutedagonad.pdf
    • http://ddservice-bmw.pl/userfiles/file/wobalezo.pdf
    • https://thejinglelab.com/wp-content/plugins/super-forms/uploads/php/files/77339mt63ae9bqlu9d8v1h7vvm/zogavasuxuzisilir.pdf
    • http://1hozain.ru/files/userfiles/files/kegawejadebakotad.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=minecraft+ore+xray+texture+pack
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00017788.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x17788 16792 bytes
font_01_sfnt_off00018f99.bin
a013ce2342554bbd70a9f85285a6053b67e9b25eaba0dd22223cc179b1b1ea16
pdf-font-stream PDF embedded font (sfnt) at offset 0x18F99 16064 bytes
font_02_sfnt_off0001a4ae.bin
c9b8b7517b00b7409dd91ab1c32140553efd4f9e03f0bc85063d68456aa996ec
pdf-font-stream PDF embedded font (sfnt) at offset 0x1A4AE 10660 bytes
font_03_sfnt_off0001bd4a.bin
167bb07bd0a639b27a37b89ff0eb1710616f54f735a55460876d536d719c7dad
pdf-font-stream PDF embedded font (sfnt) at offset 0x1BD4A 16720 bytes