Malicious PDF — malware analysis report

Static analysis result for SHA-256 c42b868ddb1a2ba7…

MALICIOUS

PDF

93.8 KB Created: 2021-06-28 22:19:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ef904691d47adc827ea2e04d886fc313 SHA-1: 0a1bd83210e21e386545bcc1c99fe5c9957a8410 SHA-256: c42b868ddb1a2ba78c4fedf8ebab78a851086887ad0e269ad4e8198ecdf09484
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains a link farm that redirects to multiple distinct hosts, many of which are compromised CMS upload directories. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The embedded URLs are designed to obscure the final destination, a common tactic in phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9924

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://ccveg.org/wp-content/plugins/super-forms/uploads/php/files/dlgbj2urp1ickj9bf61gfpa2q2/29803435251.pdf
    • https://www.emma-solutions.de/wp-content/plugins/formcraft/file-upload/server/content/files/16085d354eb726---bimemevukizadabobovasaku.pdf
    • http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087190391325---metax.pdf
    • http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/hv0mn21t03r14d6l7v5c6li85m/83716779383.pdf
    • http://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081a65dd7e25---fasez.pdf
    • https://travelsafeway.com/userfiles/file/zaxad.pdf
    • https://vettercycles.ch/userfiles/files/83479366160.pdf
    • https://www.corridar.com/wp-content/plugins/super-forms/uploads/php/files/h1u2bmt0iqov42f21a4pl33kll/sedex.pdf
    • https://erinmillssmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/kbe9lbvdl0lnhetts8ptdpv9t7/wajuzokuxajedo.pdf
    • http://614move.com/clients/4890/File/82635845410.pdf
    • https://ecef-groupe.com/wp-content/plugins/super-forms/uploads/php/files/6odll4kcpi0e6bl4ujfp0o3286/71408998282.pdf
    • https://afanasyev-design.ru/wp-content/plugins/super-forms/uploads/php/files/fc717df7c5bf3aa870444c7286a6ead3/80353518516.pdf
    • http://geyikkimya.com/userfiles/upload/file/4735947258.pdf
    • http://www.argentum.com/wp-content/plugins/super-forms/uploads/php/files/o8r6lkaef5qs2bloh996ckhph8/53396220429.pdf
    • http://noxsun.com/jingkelun/userfiles/files/20210602174711.pdf
    • http://lalitas-thaimassage-spa.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607e4f4b2e8c5---48783971471.pdf
    • https://delaneyllc.com/ckfinder/userfiles/files/wusonezolatolufizusofate.pdf
    • https://rfcorporation.net/wp-content/plugins/super-forms/uploads/php/files/f1e25a266054f1d6707b500a6d44da54/pugowojaxupul.pdf
    • https://beautyyaurient.com/editor_upload/file/44300673381.pdf
    • http://poltinka.ru/userfiles/file/vitavewotimiwetopa.pdf
    • https://groupunsur1.com/contents//files/5822245113.pdf
    • http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/160d657ecb4b8f---vawigoxefotegukomupif.pdf
    • https://hssipm.com/wp-content/plugins/super-forms/uploads/php/files/492b09690efb6a5eb120c7f5eca7bbed/53710425879.pdf
    • https://ltanimalpark.com/wp-content/plugins/super-forms/uploads/php/files/31857f052246ad149969fe8597401848/tevedurudaw.pdf
    • https://aguiapromocional.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16081477d5d179---4220282798.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=he+and+i+gabrielle+bossis+pdf+free+download
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f043.bin
fc32e69213c647f5456b8794bd58543ed85a34532cd6860c9cc5d14ef12d63cf
pdf-font-stream PDF embedded font (sfnt) at offset 0xF043 19044 bytes
font_01_sfnt_off0001210e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1210E 16792 bytes
font_02_sfnt_off0001391f.bin
76e27e971acd5e8261603bb2a5ebc25731684cc352b678b8d07084b7faa11af4
pdf-font-stream PDF embedded font (sfnt) at offset 0x1391F 16288 bytes
font_03_sfnt_off00014f0d.bin
8f91a6495b1be7e8a031f83d52e49c568bb4a782a2d748346b367f584a6a174f
pdf-font-stream PDF embedded font (sfnt) at offset 0x14F0D 10792 bytes