Malicious PDF — malware analysis report

Static analysis result for SHA-256 5cc7c2c2f6ccef66…

MALICIOUS

PDF

90.1 KB Created: 2021-07-08 09:06:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: c3e9ab07d4bac9b560c898841195b789 SHA-1: 44d5e72d54e4f05a72a7a7c851e2331b6a6cac7e SHA-256: 5cc7c2c2f6ccef66a80416efa4a15c20fe56e4566c6e1bbe94e9ccfde38ddcaa
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to numerous URLs, many of which are hosted on compromised WordPress sites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or distributing further malware. The document body is heavily obfuscated and contains metadata from wkhtmltopdf, suggesting it was generated programmatically rather than being a user-authored document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9922

Heuristics 6

  • 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.
  • 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://118highschool.am/wp-content/plugins/super-forms/uploads/php/files/618762f6f0760ca6521ebe84695c316a/rukifugufegevuk.pdf In PDF document text
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16091cc6f62ebf---fogutukebigedaneg.pdfIn PDF document text
    • https://connect.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/041bf1f41c7c7cb58afb3ca0ab2d1995/99342874103.pdfIn PDF document text
    • http://pokorny-podlahy.cz/UserFiles/File/29809440279.pdfIn PDF document text
    • http://asckhn.com/acskhn/userfiles/file/vozokowanepexeretej.pdfIn PDF document text
    • http://kinel-hunter.ru/upfiles/file/29702330683.pdfIn PDF document text
    • http://sjar-tech.com/uploadfile/file///2021060622472735.pdfIn PDF document text
    • https://dtcprojects.com.au/wp-content/plugins/super-forms/uploads/php/files/tqgfluquah62pnqmnrtn0jd7qs/zelaku.pdfIn PDF document text
    • http://agnieszkapawlik.com/userfiles/file/bemadininikata.pdfIn PDF document text
    • https://thesmithgrouphouston.com/wp-content/plugins/super-forms/uploads/php/files/48daf8e04e7b31db079dc41ce89123d0/69820168533.pdfIn PDF document text
    • https://guruamardaspublicschool.com/userfiles/files/12258264420.pdfIn PDF document text
    • https://intrigantka.ru/images/userfiles/file/womow.pdfIn PDF document text
    • https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/7adafdbc90c525f3940cbfbb163a37c9/87571049692.pdfIn PDF document text
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7f8d75a2fd---5988851278.pdfIn PDF document text
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160c6d972a7714---32733187134.pdfIn PDF document text
    • https://www.properties-thassos.com/wp-content/plugins/super-forms/uploads/php/files/s44ujmo5tjfml9qh6ba1bbb6t2/8173078777.pdfIn PDF document text
    • http://timandlor.com/userfiles/file/19709846888.pdfIn PDF document text
    • https://dineflon.com//files/49234042556.pdfIn PDF document text
    • https://voolabs.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079225b8af8f---sonadanadigevakapisifiro.pdfIn PDF document text
    • https://globalclassic.org/wp-content/plugins/super-forms/uploads/php/files/q2mj3sh7eft06r32bt6bh59bl9/surabalamupenij.pdfIn PDF document text
    • https://netshopnepal.com/userfiles/file/zogidejuwunara.pdfIn PDF document text
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ced242158bc---42030206303.pdfIn PDF document text
    • https://buddingheights.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609f7c73db5f1---58820407736.pdfIn PDF document text
    • https://www.karavanlakesfet.com/wp-content/plugins/super-forms/uploads/php/files/76215d0355982f08568268f0fbf2e892/bedigofodexobimav.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/943ed60ece2b9a6ce65109b2b9f7a608/85077908927.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=the+word+laser+is+an+acronym+forPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e58d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE58D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fd9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD9E 16252 bytes
SHA-256: bfc7ce51a1a9b37382af61f0075eb0cdb972126da031002d338643432d80e6e4
font_02_sfnt_off0001137a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1137A 17092 bytes
SHA-256: 6fca4146949ea0a9704151be1b6282f809f7b31efa2e8353143b65090be99672
font_03_sfnt_off00013ff4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13FF4 10808 bytes
SHA-256: ab03607caf80d0b59f9809d8b1d8232a245420a7e0646623aadd57882e97593e

Open this report in the interactive analyzer, or submit your own file for analysis.