Malicious PDF — malware analysis report

Static analysis result for SHA-256 c320db37107022d7…

MALICIOUS

PDF

77.3 KB Created: 2021-07-06 14:03:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: e422a8dad6ce9117ae80759ca04aec4c SHA-1: f9408ec9e0f15e334733a0aa8800abc22f775ce2 SHA-256: c320db37107022d7e8f61448482877e287b30fda500ceadb2fd87e8f6e94de1d
156 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, with many URLs pointing to compromised WordPress upload directories. These links likely lead to further malicious content or phishing pages, aiming to deceive the user into downloading a payload or divulging sensitive information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ec76cc54c1---bomixorixuwiduwepepof.pdf In PDF document text
    • https://goez3.com/10005001208290177/ckfinder/userfiles/files/logujebupupikapuxezevaf.pdfIn PDF document text
    • https://tvsporedi.si/vsebina/jivofetuxaxewotuwon.pdfIn PDF document text
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f7b17e1f65---vuzivajetakedu.pdfIn PDF document text
    • https://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b0b1aabeb87---gelizabedaromeneke.pdfIn PDF document text
    • http://bachova-terapia.sk/images/file/1646780978.pdfIn PDF document text
    • https://nazragame.com/calisma2/files/uploads/49890502623.pdfIn PDF document text
    • https://acronimocostanzo.com/userfiles/file/7572276514.pdfIn PDF document text
    • http://www.ddd-iasi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609a883389619---jarevomibesaguvu.pdfIn PDF document text
    • http://buddhavehicle.com/userfiles/file/98081477246.pdfIn PDF document text
    • https://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f0ed1a952c---gibidebogijinebudel.pdfIn PDF document text
    • http://profisystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607d3ec2d4ab2---48028348731.pdfIn PDF document text
    • https://www.kiakaha.gr/wp-content/plugins/super-forms/uploads/php/files/8r08a6q3hqk6j3pq4bbvbovlkl/xunasasizoxuvadabomozodav.pdfIn PDF document text
    • https://gaseg.com/wp-content/plugins/super-forms/uploads/php/files/07avsbt8raeo8afes1unn22iie/91442360687.pdfIn PDF document text
    • https://medok18.ru/wp-content/plugins/super-forms/uploads/php/files/26c8c80cd4fcd39785c6c7e77afd9f8f/11934181871.pdfIn PDF document text
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/1b0fcf75074a7fc0b390154e2f97976f/lazopunedenetijetidije.pdfIn PDF document text
    • https://yingzhaoliuart.com/upload/file/44645187731.pdfIn PDF document text
    • http://www.fattyweng.com.sg/wp-content/plugins/formcraft/file-upload/server/content/files/160859d1b22308---jevikuworosixetopegur.pdfIn PDF document text
    • https://betonwerkendejonge.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16079b2c049644---xekutojukifuxilewufa.pdfIn PDF document text
    • http://adance0112.com/upfile/editor/file/24092637959.pdfIn PDF document text
    • http://springswellness.net/wp-content/plugins/formcraft/file-upload/server/content/files/16087cb8a3150e---sefafijebadutuli.pdfIn PDF document text
    • http://graciaindoutama.com/kingkong/userfiles/files/14098404370.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=why+do+you+want+to+work+on+this+companyPDF 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_off0000cba3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBA3 16392 bytes
SHA-256: 1b9cd5c57b381b0c0cef59ffa836a240a327a23911b8af66dcd11f2316367180
font_01_sfnt_off0000f659.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF659 10984 bytes
SHA-256: b94d050c785a860155dba1b9995bc25254f4246a43c5a6453e2db695d42ebd66
font_02_sfnt_off00010fc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FC0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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