Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e940514743c78e4…

MALICIOUS

PDF

77.9 KB Created: 2021-09-20 23:05:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: f5d9e22e511e98c8290e4d7c825748c3 SHA-1: c2ef84a0bc810a46597b7f973ee494c997038205 SHA-256: 3e940514743c78e42242eded5758c0b07cf09cd9353e094dfc999789be0fcbb9
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains numerous embedded URLs, many of which point to domains identified as compromised CMS uploads or disposable hosting. The ClamAV heuristic also flagged the file as 'Pdf.Phishing.Trojan'. These indicators suggest the document's primary purpose is to lure users to external sites, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.2937

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
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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://bunny888.com/ckfinder/userfiles/files/67772123600.pdf In PDF document text
    • http://bubblesoflove.net/wp-content/plugins/formcraft/file-upload/server/content/files/16145dc77b3e2a---87949738008.pdfIn PDF document text
    • https://puntodeplacer.com/userfiles/file/kexekefunoxu.pdfIn PDF document text
    • https://pensiunea-escape.ro/ckfinder/userfiles/files/50274551415.pdfIn PDF document text
    • http://witnesstherealist.com/wp-content/plugins/super-forms/uploads/php/files/e14651fcdee3345a4df1db2ec3a155c7/65425342456.pdfIn PDF document text
    • http://studiomuraca.eu/userfiles/files/60720126612.pdfIn PDF document text
    • http://www.mediacomriccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/16147f7719c2f1---55640577608.pdfIn PDF document text
    • http://www.hzkontejnery.cz/ckfinder/userfiles/files/gerarovusem.pdfIn PDF document text
    • http://parfumland.sk/upl/pigojimozujawajeditax.pdfIn PDF document text
    • https://farsiherbal.com/cache/fck_files/file/44299206670.pdfIn PDF document text
    • https://tectrongim.com/uploads/files/niwusib.pdfIn PDF document text
    • https://fullmagicweekend.com/ckfinder/userfiles/files/fijenakifisebatudux.pdfIn PDF document text
    • http://hotelbasantresidency.com/uploads/podanolekajili.pdfIn PDF document text
    • https://hopadive.cz/ckfinder/userfiles/files/titafupudoges.pdfIn PDF document text
    • http://ck-tct.ru/userfiles/file/likikozovu.pdfIn PDF document text
    • https://cheesykeju.com/contents/files/22832805735.pdfIn PDF document text
    • http://chuaphucluong.com/uploads/image/files/20574586000.pdfIn PDF document text
    • http://andreaslasnik.com/data/files/56752818824.pdfIn PDF document text
    • https://bodykneadstherapy.com.au/ckfinder/userfiles/files/feluv.pdfIn PDF document text
    • http://angelascanu.it/uploads/file/mivevulurana.pdfIn PDF document text
    • https://cualuoihoanmy.com/uploads/userfiles/file/nobuzewabuw.pdfIn PDF document text
    • http://sterenstein.ru/userfiles/file/gadudizazefufalegi.pdfIn PDF document text
    • http://abcgsgeds.friendship-match.com/upload/files/5095479051.pdfIn PDF document text
    • http://gyermekhaz.hu/Content/site_images/files/46944454744.pdfIn PDF document text
    • http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/1613f9ecec2fb2---94922306578.pdfIn PDF document text
    • http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/161408d12457ee---54079815842.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=how+to+unlock+your+bootloaderPDF link annotation
    • 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_off0000d7bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7BD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000efd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFD4 10624 bytes
SHA-256: 81956e7faab0085f0b0ac5cdf158993dedb195d127b70ab954225dc25d5ddac4
font_02_sfnt_off00010854.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10854 18236 bytes
SHA-256: ff3a14543dfd0c0aaa5e8d89b4661a90972a7f6be0a5eb338e164d33a03ab9a9