Malicious PDF — malware analysis report

Static analysis result for SHA-256 d09d19aa34dba647…

MALICIOUS

PDF

88.5 KB Created: 2021-06-26 00:02:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 496b03c6e4c0b70eb72c9ac991f9e8ef SHA-1: 18af3c43340d2c521ceea685a173158b62523b70 SHA-256: d09d19aa34dba6474e557ec85f601d2fba118d8f879130f7e6c2377eb4bc034e
196 Risk Score

Malware Insights

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

This PDF document is classified as malicious by ML models and ClamAV, exhibiting characteristics of a phishing and malware distribution lure. The 'SE_BROWSER_INSTALL_LURE' heuristic indicates the document prompts the user to install a browser extension or update, a common tactic for credential theft or malware delivery. While no scripts were directly extracted, the PDF structure and embedded URLs suggest it may host or link to malicious content, potentially leveraging JavaScript for execution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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 http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a56dec3413b---sunasopimisevuxonipuxa.pdf
    • http://brodart01.com/wp-content/plugins/super-forms/uploads/php/files/lquhvlouj0kb8akrpu2s1vtcir/pogalavisawugomadilumu.pdf
    • http://bakoca.hu/files/file/zuxiposamuma.pdf
    • http://ellev.fr/upload/files/kutebezaxemezikakexojo.pdf
    • https://vaynow.com/wp-content/plugins/super-forms/uploads/php/files/de302a16b36abd4cf23d6c18a5d82053/saxabonarogepu.pdf
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607ece2148e03---dugagilejuwixuzalodutofef.pdf
    • https://ewastexperts.com/userfiles/files/56910047077.pdf
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607614a8339ab---35342370919.pdf
    • https://lasanisports.com/files/vudilexek.pdf
    • http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af26a22cd15---80486224473.pdf
    • http://anandamsanyal.com/userfiles/file/jomazemisuzolutovelozon.pdf
    • http://anhuishangbiao.com/upload_fck/file/2021-6-19/20210619045914595742.pdf
    • http://midel.me/userfiles/file/17512633423.pdf
    • http://asu.com.vn/wp-content/plugins/super-forms/uploads/php/files/h3juvhmg8rc7m5dm1et2m5tss3/25373225658.pdf
    • http://victorylimo1.com/wp-content/plugins/formcraft/file-upload/server/content/files/160765fa85e2e7---xejoxilinik.pdf
    • http://wallacewilliamsfamilyreunion.net/clients/6/66/662ca4338cd1fa41fa93b88222973dc6/File/pobipomuxa.pdf
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609867c2e71c8---lutusarisewepiromesegu.pdf
    • http://www.asejnrtigers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608d04568349f---beboxixopepid.pdf
    • https://leo-translate.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/16087ecaf51edd---vavipikufewajemuverezuge.pdf
    • https://antoinepanau.com/wp-content/plugins/super-forms/uploads/php/files/06051441a47df511f4d598e9a1a113d7/74732990852.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=content+management+synonym
    • 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_off0000f743.bin
e20109433fb3fadc6a072d1ae0c404cb536886c2a84ccf5beb30fb10d6befe98
pdf-font-stream PDF embedded font (sfnt) at offset 0xF743 17688 bytes
font_01_sfnt_off00012599.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12599 16792 bytes
font_02_sfnt_off00013db0.bin
cc8d74c4fcae576babc6db44ac02193e4c35595d251ba541480784d954db01bb
pdf-font-stream PDF embedded font (sfnt) at offset 0x13DB0 10360 bytes