Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e173bee5aa0e5e0…

MALICIOUS

PDF

88.1 KB Created: 2021-07-23 03:32:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: a790b66587bffc774c7a23c1f483c313 SHA-1: 2016208abbec87ab3b6c8b60bcff639cf520e259 SHA-256: 0e173bee5aa0e5e02f60dfbccdc26c730bf696d644b805f203054afc0e92ce17
216 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

This PDF file was flagged by multiple heuristics, including a high-confidence ML classifier and ClamAV, indicating malicious content. The heuristics suggest it functions as a lure, potentially for a callback phishing or tech-support scam, and specifically mentions a password-protected archive handoff. Numerous external URLs are present, many pointing to compromised CMS uploads or disposable hosting, likely serving as part of the lure or payload delivery infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://parfumerieindex.nl/images/uploads/zokoxavizoz.pdf In PDF document text
    • https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c71b4e3ca64---20016157526.pdfIn PDF document text
    • https://www.karavanlakesfet.com/wp-content/plugins/super-forms/uploads/php/files/ac34f6201add43f1d75517278de80918/luteledodasi.pdfIn PDF document text
    • https://maximatrimony.com/ckfinder/userfiles/files/36843312465.pdfIn PDF document text
    • http://matras-devison.com/upload/file/33189468970.pdfIn PDF document text
    • https://bettenbaehren.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ca5f0c15216---53104162204.pdfIn PDF document text
    • http://feach.ie/images/uploads/file/xexunimazamufedixeja.pdfIn PDF document text
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ec4ab08653b---18693928357.pdfIn PDF document text
    • https://trsbarriersdirect.com/wp-content/plugins/super-forms/uploads/php/files/b4o42b5eavpqv9n1n99trk2v1l/27058266222.pdfIn PDF document text
    • http://timeyear-v.com/userfiles/file/sizififudusuzelekedabif.pdfIn PDF document text
    • https://www.stjohnhomelessshelter.org/wp-content/plugins/super-forms/uploads/php/files/194607d80e8d1255162ae0d5397588d9/nojevovunuliki.pdfIn PDF document text
    • https://boumqueur-edition.com/upload/fckeditor/file/15883130789.pdfIn PDF document text
    • https://fobiy.net/wp-content/plugins/super-forms/uploads/php/files/e0bea4f65147511efc205abc46148c9d/pupebipovurewugava.pdfIn PDF document text
    • https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ee1ba84337e---26148824511.pdfIn PDF document text
    • http://sgpeo.pl/users//file/loxugowagupipa.pdfIn PDF document text
    • http://brkvinc.com/userfiles/file/32147291814.pdfIn PDF document text
    • https://bharatbiodiesel.com/userfiles/file/kinikorujaw.pdfIn PDF document text
    • https://mymovingestimate.com/wp-content/plugins/super-forms/uploads/php/files/3827033c19c318be8b5fc17a3d54d70f/8823497465.pdfIn PDF document text
    • https://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/160c869c8da492---birafurelukinelulugegovem.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=two+discord+accounts+on+iphonePDF link annotation
    • http://pro.ovh.net/~tribuene/images/banque/file/79469391027.pdfIn PDF document text
    • 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
font_00_sfnt_off0000f3e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3E6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010bf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BF8 17544 bytes
SHA-256: b7c52d1ad7f2df79cf918646ea1288da8ef4314248b144ee811af58f566ee1b3
font_02_sfnt_off00013a15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A15 10712 bytes
SHA-256: 08280fdc6e3d42ec0f30a6c80f6194fd38429f15cc8eaecf39acb38f4d70e924

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