Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba40189eaf5d5eb1…

MALICIOUS

PDF

92.3 KB Created: 2021-06-30 04:19:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 24914fef8eb1f22d9ce5f81065b71e24 SHA-1: 89f0aa31e9d2b309a01dda91944a52ef88a019ed SHA-256: ba40189eaf5d5eb1c172dab6dc5231192d2d62e77570d19e05661c52ae4095ab
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external URIs, many pointing to compromised WordPress sites or disposable hosting, suggesting it functions as a link farm to distribute malicious content or phish users. The presence of embedded URLs and the nature of the heuristics strongly suggest it is used as a lure, likely for spearphishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://queure.ru/uplcv?utm_term=binary+to+bcd+truth+table PDF link annotation
    • http://hanleyresources.com/images/1571450072.pdfIn PDF document text
    • http://jrmhandling.nl/upload/file/1752003274.pdfIn PDF document text
    • https://www.ayersworthglen.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082b867a3555---mafope.pdfIn PDF document text
    • https://plumcourse.com/wp-content/plugins/super-forms/uploads/php/files/c60c34e8d92f82bb23fa642e93a464c3/nemijajisomalozusad.pdfIn PDF document text
    • http://self119.net/upload/userfiles/2021/06/files/210609211641.pdfIn PDF document text
    • https://encouragingmath.com/wp-content/plugins/super-forms/uploads/php/files/8fb89b50570a72e084fe5ec498bf699a/gorubudobofazo.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ad58f740b7---1352732061.pdfIn PDF document text
    • https://regeneracion-capilar.com/wp-content/plugins/super-forms/uploads/php/files/8c058c9a090450756d14d5de615fa97d/lenowinemenajibozeto.pdfIn PDF document text
    • https://globalclassic.org/wp-content/plugins/super-forms/uploads/php/files/f8l2jpoeudf6vu8j2krea65ld1/7190567462.pdfIn PDF document text
    • http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607353b289a26---63712252840.pdfIn PDF document text
    • http://maychamsocda.vn/images/userfiles/file/12522061587.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/b3glpf15c53pg4mb5ore3abgd1/tamaxekaredokonogaxa.pdfIn PDF document text
    • https://www.blackandwhite-salon.com/wp-content/plugins/super-forms/uploads/php/files/2e30061475ff4734295a2dbc3717dfa6/90092470235.pdfIn PDF document text
    • https://amiablediamonds.com/wp-content/plugins/super-forms/uploads/php/files/e7d42efa6d570e95188dbce021b4dde1/firenesovufopole.pdfIn PDF document text
    • http://oodow.cn/upload/file/210619202228049236zg3gv7ngho25.pdfIn PDF document text
    • https://areshin.ru/wp-content/plugins/super-forms/uploads/php/files/052df9c30dc489aacbbc579cb42f1964/19584652608.pdfIn PDF document text
    • https://tirthmobile.com/wp-content/plugins/super-forms/uploads/php/files/8urvpqj0mitu436l2t9oq5ca5n/18153176943.pdfIn PDF document text
    • http://bennyhigh73.com/clients/3/33/33ce00c6a031cf3b17a3dcf69aaa7594/File/29894467205.pdfIn PDF document text
    • http://beloezoloto.ru/userfiles/file/zitatufizilefafavesig.pdfIn PDF document text
    • http://ilksolar.com/Images/Media/files/57399985275.pdfIn PDF document text
    • http://hoondb.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607555ef4c290---43250562897.pdfIn PDF document text
    • http://reicar.dk/userfiles/file/rudagamijibibozaxolom.pdfIn PDF document text
    • http://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160be7427b59b0---11486519742.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_off00010303.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10303 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011b15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B15 19244 bytes
SHA-256: 37359e8a1027b50dbd229ed1a7e49437956ec40418d7a344adaca169b0a19d09
font_02_sfnt_off00014bb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14BB4 10704 bytes
SHA-256: 28ad3eb00615db37b807f0e501040a0bc3594d4faa4ce6805c31dd83d57b8267

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