Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3a2e28093d22dda…

MALICIOUS

PDF

112.6 KB Created: 2021-06-29 22:13:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 031d92d5849cc2b24e7350ca82fe788f SHA-1: 036c1d0b3a1bfd79f52d7911d5e60da1b9af1f6d SHA-256: a3a2e28093d22ddab30eb1fc9bbcd04353ad6363df13c33029eff2c950b9d72b
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to compromised websites, many of which host PDF files. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic indicates the document likely instructs the user to open a password-protected archive, a common tactic to bypass gateway security. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

Heuristics 7

  • 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.
  • 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://jiptv.nl/wp-content/plugins/super-forms/uploads/php/files/7l0fu1gp9o2a9i90u03p0222rc/72866319697.pdf
    • https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160cd391c21050---39562620601.pdf
    • https://personalloan2u.com/wp-content/plugins/super-forms/uploads/php/files/7ff8b3302a98e093b62cb4ac319f9c21/63917986570.pdf
    • http://accomplishtheimpossible.com/userfiles_ati/file/1677688398.pdf
    • http://hydrem.ru/images/file/51155365146.pdf
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/182a4c8befff94f29b63d65145417013/tafitagen.pdf
    • http://biomisszio.hu/tmp/zuminexaxubaxigorigazol.pdf
    • http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e9a4288e18---wetelenorokapu.pdf
    • http://dodici12.ru/wp-content/plugins/super-forms/uploads/php/files/fu8uu4a003j513ofuu3setumv6/zilememimubujagavosili.pdf
    • http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608b48cada895---29046773313.pdf
    • https://bkht.vn/userfiles/file/11554826933.pdf
    • http://weifong.tw/fckimages/file/vixugalepelo.pdf
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071cc24c9d21---vubazoposulaxazukaropawu.pdf
    • http://sciencevier.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2f01a38fc9---jijosubepubaporol.pdf
    • http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160877dd557faf---nowitowowojadevifo.pdf
    • http://datavincity.com/uploads/ckfinder/files/37007984983.pdf
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/j7iaigvhlmgevqodlnfrj9sju8/vepekojoronapagixinuzo.pdf
    • https://www.simplythebestevents.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a59c6a5bb35---xadaxejo.pdf
    • http://nuraski.pl/wsg/userfiles/54094146688.pdf
    • http://southport1969.com/clients/861680/File/28137956883.pdf
    • http://edwardnugent.com/userfiles/files/19925748811.pdf
    • https://www.alignerco.ca/wp-content/plugins/super-forms/uploads/php/files/c565132121e92d09fc1098de9ab98186/valezijedanat.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=drop+view+if+exist
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00015566.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x15566 16792 bytes
font_01_sfnt_off00016d78.bin
735be15e44f7dc0a04df0b43c9a3f1317fa39073d2d1608e285d14f43b9f1d21
pdf-font-stream PDF embedded font (sfnt) at offset 0x16D78 18300 bytes
font_02_sfnt_off00019e2f.bin
5c2c796333ff83c4a11b6503b7d22f77f51c897985fb542e893e1227ef7597d0
pdf-font-stream PDF embedded font (sfnt) at offset 0x19E2F 10296 bytes