Malicious PDF — malware analysis report

Static analysis result for SHA-256 964a65d09a3845fa…

MALICIOUS

PDF

91.7 KB Created: 2021-08-17 03:46:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: fd67bb0aff15886e4fc01682e047ead9 SHA-1: 92f0df543a6f544a4d31c04288c6a7a5b79293a4 SHA-256: 964a65d09a3845fa9623c42f2f5e0f1bb0018fe9a145f407642b554812e58a89
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple external URLs hosted on compromised or disposable domains. These links are likely intended to facilitate phishing attacks or download further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://synerhu.ru/uplcv?utm_term=iphone+11+pro+max+camera+tutorial PDF link annotation
    • http://www.drop-lok.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a78ba5f56d---99615380408.pdfIn PDF document text
    • https://marblobath.com/app/webroot/img/files/55225493405.pdfIn PDF document text
    • http://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca02dd7978---wijibosepasebuwirizuve.pdfIn PDF document text
    • http://fygl.net/uploads/file/220841261440.pdfIn PDF document text
    • http://cooperclassof1970.com/clients/9656/File/62499714736.pdfIn PDF document text
    • http://walterchiropracticclinic.com/home/walter/public_html/ckfinder/userfiles/files/guzidonoreja.pdfIn PDF document text
    • https://www.hintonassociates.com/wp-content/plugins/super-forms/uploads/php/files/bc0add88f3e70b15b259a4e336cf3787/sujeguwuf.pdfIn PDF document text
    • http://royalgoodviewresort.com/Uploads/file/30451926278.pdfIn PDF document text
    • http://vijyaiprismcrm.com/userfiles/files/rujofo.pdfIn PDF document text
    • http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e31a130f2e---duvonulot.pdfIn PDF document text
    • https://infotechloyalty.com/bot/ckfinder/uf/files/25086673091.pdfIn PDF document text
    • http://turar-mussin.com/userfiles/File/34609364205.pdfIn PDF document text
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/160782994722a9---jodojawet.pdfIn PDF document text
    • https://bitree.com/ckfinder/userfiles/files/55320197947.pdfIn PDF document text
    • https://abeess.com/userfiles/file/6884881169.pdfIn PDF document text
    • http://asid.rw/userfiles/file/fokewozuwilumede.pdfIn PDF document text
    • http://ominocoibaffi.it/userfiles/files/63116981633.pdfIn PDF document text
    • http://bmhs1963.com/clients/7/72/7286fd37811b7a5dece6e69924e4d5ab/File/saweru.pdfIn PDF document text
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a3ef3e14726---runum.pdfIn PDF document text
    • https://hostsolutions.ro/app/webroot/files/userfiles/files/rerabitiwedabirarup.pdfIn PDF document text
    • http://cokhitienvuong.com/uploads/files/13546574121.pdfIn PDF document text
    • http://guanzhuli.com/userfiles/file/46366193080.pdfIn PDF document text
    • http://idcla.net/upload/files/solepizigogogevesimarekeg.pdfIn PDF document text
    • http://airholic.com/UpFiles/WebEditorFiles/file/78247007751.pdfIn PDF document text
    • 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001016b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1016B 17460 bytes
SHA-256: 346c7616ea83463c908dfbd9616c20124b876eaed7ad3b2d0a985192ec07569e
font_01_sfnt_off00012ed8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12ED8 10676 bytes
SHA-256: 85278758fb0fc09a5785b7b43ddf2dad10f4cc8e8c7b66a6c81926502f0513f0
font_02_sfnt_off00014725.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14725 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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