Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1d2507cda727f2d…

MALICIOUS

PDF

82.3 KB Created: 2021-08-20 23:50:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 432ece26558004994bc87ede5a12e7b9 SHA-1: cf7fb3cec45becbb8c0ee7150a9b53e1bd0baa02 SHA-256: c1d2507cda727f2db0058c6ff82b60f61002fcfe1ee5fa2dc5bdbf50529490d8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many hosted on compromised CMS platforms, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are consistent with a malicious PDF dropper.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 https://notofthisgalaxy.com/wp-content/plugins/super-forms/uploads/php/files/t9eq9umhpklucfr9o6oauo3j6j/ledubotakujomewilafuki.pdf In PDF document text
    • http://daiichihr.com/uploads/news_file/nideser.pdfIn PDF document text
    • https://patriot.ch/wp-content/plugins/super-forms/uploads/php/files/uni8c1nk4bbd8ltctc9saf6a6l/85235974575.pdfIn PDF document text
    • https://bodykneadstherapy.com.au/ckfinder/userfiles/files/ximak.pdfIn PDF document text
    • https://greenfuturevietnam.com/Upload/files/ravugomezelis.pdfIn PDF document text
    • https://journeypeople.cc/wp-content/plugins/super-forms/uploads/php/files/cebc8b44bbd79636104fd3c8b94c47c9/79515808320.pdfIn PDF document text
    • https://haltia.mx/sii/ckfinder/userfiles/files/fizabe.pdfIn PDF document text
    • http://papianiarch.it/userfiles/files/52975773577.pdfIn PDF document text
    • http://tauben-buchmeier.de/kleinberliner-schuetzen/userfiles/files/79168804926.pdfIn PDF document text
    • http://k1a.ru/images/files/file/60921675087.pdfIn PDF document text
    • http://alibabashipping.com/userfiles/file/sefokef.pdfIn PDF document text
    • http://sunrui-ti.com/d/files/11139211292.pdfIn PDF document text
    • http://duetsepolno.pl/userfiles/file/vigexixemofizagipepazisaj.pdfIn PDF document text
    • https://marciasmithconsulting.com/wp-content/plugins/super-forms/uploads/php/files/cc76ef1f9bf833bb4d43ec46acced664/96317615448.pdfIn PDF document text
    • http://hykylalumni.org/userfiles/linolakekedovavu.pdfIn PDF document text
    • https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/cbf170548af5cd107363240c2cf9e63f/gojafixawaros.pdfIn PDF document text
    • http://dermalab.pl/userfiles/file/supasufesuxog.pdfIn PDF document text
    • https://www.certificagreen.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ff59a03da6---31162202317.pdfIn PDF document text
    • https://www.marthatrotts.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1611106735e13a---jazojadaxu.pdfIn PDF document text
    • https://stbenedikt.ch/userfiles/files/33552762676.pdfIn PDF document text
    • https://sketchup360.vn/wp-content/plugins/super-forms/uploads/php/files/04khl3j080c4k27vg94jif5upi/pakimedilozunisizipiwe.pdfIn PDF document text
    • http://herodumpsterrental.com/wp-content/plugins/super-forms/uploads/php/files/bf1d895941a5b35680e07f6785264362/nudifotuwezolifidu.pdfIn PDF document text
    • http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b880e9cd5f4---fovifa.pdfIn PDF document text
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160967bf93413c---zogojetiwolatuvitizezekij.pdfIn PDF document text
    • http://eau-msu.ru/ckfinder/userfiles/files/bupupukepuwemeberob.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=what+is+the+salvation+army+missionPDF link annotation
    • 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_off0000df21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF21 16984 bytes
SHA-256: bb9aadf666f28bf14eeba089f0c3f6a4bcca1c41f4c2caac1eb97037548632ab
font_01_sfnt_off00010b48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B48 10548 bytes
SHA-256: 997a86db92ad3dea66860db6afa79d1b73237b5387288a469d0e9e46b1850e5c
font_02_sfnt_off0001232e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1232E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1