Malicious PDF — malware analysis report

Static analysis result for SHA-256 fafa7dfad5a70b83…

MALICIOUS

PDF

84.1 KB Created: 2021-06-28 04:55:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f5494b6aa23939e6d4703dcfe725e0e5 SHA-1: abcbe7e1f89b33ddb97f4f70a4a6c1ea30344c4c SHA-256: fafa7dfad5a70b83cdda84a42e51e1a08c1da76e58b86b7528c0f1f7a097fed6
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm hosted on multiple compromised websites, suggesting an attempt to distribute malicious files. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were directly extracted, the PDF structure and URL patterns are consistent with a phishing lure designed to trick users into downloading further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.caslyn.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607df0dc2a036---xalimi.pdf
    • https://ddshower.com/ckfinder/userfiles/files/potefuwor.pdf
    • https://ceccargiurgiu.ro/userfiles/file/dajurika.pdf
    • http://tragadsonisurat.com/ckfinder/userfiles/files/setitoviden.pdf
    • http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/16081c2a5c6e78---jijulasinimoxuwewefo.pdf
    • https://projetounificado.com/uploads/files/kodugudanututejoximu.pdf
    • http://inglewood1968.com/clients/68690/File/167487371.pdf
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b43fe19824a---68285277395.pdf
    • https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/3cc785c918d85a069050a626d4176439/5980529383.pdf
    • http://www.goataxiservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a82cdd2de9f---74044804575.pdf
    • http://myphamhelios.vn/luutru/files/94485734925.pdf
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072639808971---7396534039.pdf
    • https://bistakalikotenetwork.com/userfiles/file/77591919303.pdf
    • https://pelicanfinancialnetwork.net/ckfinder/userfiles/files/sozudixudefedutatupim.pdf
    • http://aplus.to/userfiles/file/bekegi.pdf
    • https://beautifullifeuk.com/wp-content/plugins/super-forms/uploads/php/files/79c816915977cd5ef2230c3e3b51189a/29479656315.pdf
    • http://stellamaris.cz/userfiles/8711301792.pdf
    • https://amagi.la/wp-content/plugins/formcraft/file-upload/server/content/files/1607416d8d9cee---suzilatirijajeluveg.pdf
    • https://zzwgjx.com/d/files/1605942908.pdf
    • https://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/3ff8bd92f72d3da3fb9b81331419f196/xigovelev.pdf
    • http://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c33f78c0b43---97125558337.pdf
    • http://queuemanagementsystems.com/wp-content/plugins/formcraft/file-upload/server/content/files/160754f20391cf---fabisor.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=what+is+reading+level+g
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e514.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE514 16792 bytes
font_01_sfnt_off0000fd2b.bin
b6276344cc8ff89ae1e38842991c7134ce0552dbd9d6f3e4e853f7636576d64e
pdf-font-stream PDF embedded font (sfnt) at offset 0xFD2B 10464 bytes
font_02_sfnt_off000114ac.bin
cf3840476baebda2c6923dc377a6f8f558bb410620250591b4ad741bd4d66ef2
pdf-font-stream PDF embedded font (sfnt) at offset 0x114AC 17388 bytes