Malicious PDF — malware analysis report

Static analysis result for SHA-256 a29370f0d9f2736e…

MALICIOUS

PDF

102.5 KB Created: 2021-06-30 05:16:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: cfbaa67db2a035d7a712b520d2acf213 SHA-1: 4a2117b5d709d194b9ed31937be2ab41029ca4f3 SHA-256: a29370f0d9f2736e16a502aaa01f9fdaf910b44e5bde0b370f6d9ebe0a2c4570
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress sites, suggesting it's designed to lead users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. The file's structure as a link farm is a common tactic for distributing payloads or directing users to phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9934

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://relleno-acidohialuronico.com/wp-content/plugins/super-forms/uploads/php/files/3a1e4f377540446b489e4149e7922aea/11076253748.pdf In PDF document text
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c00ecdce9c6---poranuweluj.pdfIn PDF document text
    • https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/16088c104f39ea---xegemifeniruberirabobot.pdfIn PDF document text
    • https://traveltokiev.com/wp-content/plugins/super-forms/uploads/php/files/fb2b4fkfbi06l809deuo08ef87/31882970669.pdfIn PDF document text
    • https://www.acetechnology.co.in/wp-content/plugins/super-forms/uploads/php/files/0oa5anu9287i460gon0c05bqp6/dufamelagimojikapa.pdfIn PDF document text
    • http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/160d832f758ddd---parupepoxasazubamopebaxi.pdfIn PDF document text
    • https://www.ezhealthcheck.com/wp-content/plugins/super-forms/uploads/php/files/h2t8bc3aimu8kbqap1l8dg3bss/bemajizisiv.pdfIn PDF document text
    • http://kagoshimakojintaxi.com/userfiles/file/nonolawuxowixoz.pdfIn PDF document text
    • http://cc-loges.com/uploads/file/rekusiw.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/dematumodujobanizilofir.pdfIn PDF document text
    • https://gpagroup.in/wp-content/plugins/formcraft/file-upload/server/content/files/160c51d64374db---zetorajijotipasolujixoz.pdfIn PDF document text
    • https://by-express.com/upfiles/editor/files/madeku.pdfIn PDF document text
    • https://ontime-taxi.kg/wp-content/plugins/super-forms/uploads/php/files/5b3973f224cf03ff3bdb5f3e249f771a/zapipekudoguwitomevebo.pdfIn PDF document text
    • https://speeddating.lt/speeddating/ckfinder/userfiles/files/22743136680.pdfIn PDF document text
    • https://cspdental.com/wp-content/plugins/super-forms/uploads/php/files/c56e191698b163b4b4762f2fc691dd26/96243621612.pdfIn PDF document text
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16079fb22c375b---nixej.pdfIn PDF document text
    • http://short-story.ru/upload/file/sujatufisamolum.pdfIn PDF document text
    • http://msci.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/160a80b183fbe4---wojewalimewenodikudoloma.pdfIn PDF document text
    • http://qianlong99.org/ckfinder/userfiles/files/30287640279.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c854ce05728---regitojupel.pdfIn PDF document text
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b0a24d52c54---66469868126.pdfIn PDF document text
    • http://dui-antidote.net/images/userfiles/file/50290615466.pdfIn PDF document text
    • http://splogservice.ru/content/file/pafedoxev.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=syp+disodium+hydrogen+citratePDF link annotation
    • 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012939.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12939 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001414b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1414B 18644 bytes
SHA-256: dc7832398c43cc08c3484b75d21fd292617e179f20bb6b4b6be5d06d4346127c
font_02_sfnt_off000172cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x172CD 11204 bytes
SHA-256: 9139c7cf68df9ae7eb8cdab9580360dd538c2afe8753dbd42dfeb2fcc7fd90fd

Open this report in the interactive analyzer, or submit your own file for analysis.