Malicious PDF — malware analysis report

Static analysis result for SHA-256 f225ad97400e17b6…

MALICIOUS

PDF

94.4 KB Created: 2021-08-18 15:09:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 272ceba85c71bac77787c0dcfdc425e2 SHA-1: 724e4e0fdb97a1a95144efdbeda23de572583fc9 SHA-256: f225ad97400e17b659e0f9767aa821330255aa2babf57c127befe5c672a85793
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many of which point to compromised WordPress upload directories or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of these links and the overall structure strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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 http://bielwod.com/userfiles/file/56120275396.pdf In PDF document text
    • https://www.breastcancerfoundation.in/wp-content/plugins/super-forms/uploads/php/files/d37973d202e2a611c54963400e6e3fbc/63930025838.pdfIn PDF document text
    • http://abwingssuffolk2.com/uploads/files/buvil.pdfIn PDF document text
    • http://sunnyten.net/userData/board/file/sufoziwal.pdfIn PDF document text
    • https://wills.sg/wp-content/plugins/super-forms/uploads/php/files/f60817e6d2974a3628ce18108a98d024/20353020737.pdfIn PDF document text
    • http://xinyaoqiye.com/upload_fck/file/2021-7-25/20210725211710781064.pdfIn PDF document text
    • http://hk-sai.com/ckfinder/userfiles/files/mudifitalob.pdfIn PDF document text
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b29c7ab9136---zovezumodefepom.pdfIn PDF document text
    • http://videoacceso.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c922ebe5b8a---jaredoxegosilixar.pdfIn PDF document text
    • https://apartmani-mestrovic-krk.hr/files/voperez.pdfIn PDF document text
    • https://vieclamday.com/userfiles/file/89230295281.pdfIn PDF document text
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1607ec121b87a4---75884836838.pdfIn PDF document text
    • https://www.zulilighting.com/wp-content/plugins/super-forms/uploads/php/files/b75327611abcbdaea440f857769db358/zegirajirasiwuz.pdfIn PDF document text
    • https://stewsites.com/wp-content/plugins/super-forms/uploads/php/files/c5d1e05abfbf7a40915dfcaaf4387ac4/74429842182.pdfIn PDF document text
    • https://www.demetagras.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077bb3163a63---dimuxujubevolir.pdfIn PDF document text
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/16112438d00dbb---zedinuvuzitofov.pdfIn PDF document text
    • https://xn--faades-mtal-n9a6a.ch/ckfinder/userfiles/files/fevogoweditizu.pdfIn PDF document text
    • https://europartner2.pl/uploads/jemidivujufotalifibanad.pdfIn PDF document text
    • http://oguzlarotomatiksanziman.com/depo/sayfaresim/file/kafazugomaro.pdfIn PDF document text
    • http://discoveryenglish.org/wp-content/plugins/formcraft/file-upload/server/content/files/160bea3ea4f8ec---nofixavotazejuvalelapov.pdfIn PDF document text
    • https://www.allterra.group/wp-content/plugins/super-forms/uploads/php/files/78f03eebd5a424e7fa371749277831fa/6050593439.pdfIn PDF document text
    • http://bioaec.com/userfiles/files/15122842777.pdfIn PDF document text
    • http://technocom.pl/editor/file/79349276605.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=quicksand+nella+larsen+pdfPDF 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

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_off00010c5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C5E 17156 bytes
SHA-256: ddc3f80f9344e3ae4f458a5795ab25e165486e87ed3f8662982ccaafb80b67bb
font_01_sfnt_off0001393e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1393E 10648 bytes
SHA-256: d64b40352d2302ed08d492137d41df5d73ffd48fe5600a51d109fdcadffc4538
font_02_sfnt_off000151cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x151CD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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