Malicious PDF — malware analysis report

Static analysis result for SHA-256 564e87fec4e4615d…

MALICIOUS

PDF

72.0 KB Created: 2021-09-12 01:21:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 7bafe5e905b2ae59afbba28a74b5d4ac SHA-1: 6e273e713fd1ea4ef3cfc1d41b978eeb72426063 SHA-256: 564e87fec4e4615d14d3d4ea1404a180b7d339f946f1fbd638a687272c6963a0
154 Risk Score

Malware Insights

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

The sample is a PDF identified as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It functions as a link farm, containing numerous URLs that point to other PDFs hosted on compromised websites. These linked PDFs likely serve as lures for phishing attacks or as droppers for further malware, indicating a multi-stage attack chain.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8257

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
  • 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
  • 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://ltes2.tw-goods.com/UserFiles/files/witijavexir.pdf In PDF document text
    • https://whitelightdesign.com/wp-content/plugins/super-forms/uploads/php/files/255f86c98e65f789d9acc7862ef07673/27686394832.pdfIn PDF document text
    • http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16130af2e4428d---64276562121.pdfIn PDF document text
    • http://wideanglepackaging.com/ckfinder/userfiles/files/vepome.pdfIn PDF document text
    • https://4wheelchile.cl/admin/uploads/file/35276420235.pdfIn PDF document text
    • http://xn--80aamwn.xn--p1ai/userfiles/file/41979938717.pdfIn PDF document text
    • http://jucal.es/images/file/tuwezuva.pdfIn PDF document text
    • https://dreptultau.hotnews.md/upload/userfiles/files/13919831268.pdfIn PDF document text
    • https://esterkins.de/ckfinder/userfiles/files/35140744413.pdfIn PDF document text
    • https://pakistanchristiancongress.org/userfiles/file/dosavumok.pdfIn PDF document text
    • http://assessmentinsight.com/ckfinder/userfiles/files/21456969100.pdfIn PDF document text
    • http://rooptex.com/uploads/xasomimaletepuk.pdfIn PDF document text
    • https://newcar-rental.com/uploads/files/202109080410177166.pdfIn PDF document text
    • https://www.wikiwebagency.it/wp-content/plugins/super-forms/uploads/php/files/df6d876660a276c967d5b08039c3f470/zasepobiparuzaxazunuda.pdfIn PDF document text
    • http://logicamail.it/draft/media/26000365647.pdfIn PDF document text
    • https://sowlindia.com/userfiles/file/89431210726.pdfIn PDF document text
    • https://praktijkbinnenstad.nl/file/45230679604.pdfIn PDF document text
    • http://castrolmintabolt.hu/images/upload/file/notukikizoverepekororoba.pdfIn PDF document text
    • https://infravoip.com/wp-content/plugins/super-forms/uploads/php/files/4ebcfc12ad03574b4a42528f85f62a35/59455280628.pdfIn PDF document text
    • http://lammensfilip.be/uploads/files/6883628702.pdfIn PDF document text
    • http://bensonlandscape.com/editorData/file/taridolagigituletuku.pdfIn PDF document text
    • http://hanart21.com/files/userfiles/file/79953045240.pdfIn PDF document text
    • https://eagleegg5k.com/ckfinder/triplebuserfiles/file/39887448979.pdfIn PDF document text
    • http://olgapolyakova.com/files/files/gawunuvetamo.pdfIn PDF document text
    • https://completecollegestrategies.com/wp-content/plugins/super-forms/uploads/php/files/ba93aed6fc346804c7b682eacb34d2e9/44813562241.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=tamil+mobile+movie+freePDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c6a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6A7 19580 bytes
SHA-256: 56957d21dd62e5cca6a26e48a8922a6bafbdc35a761598d71243c14defcf6369
font_01_sfnt_off0000fab3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAB3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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