Malicious PDF — malware analysis report

Static analysis result for SHA-256 defc0b7f457fd0f2…

MALICIOUS

PDF

89.8 KB Created: 2021-06-29 06:50:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: b6f5d49ff694162fabc927db41e1246f SHA-1: 5370d462cc7d9bdcf9833796704189913989d4a1 SHA-256: defc0b7f457fd0f22cdeb525d34724a84d56180fed6ce69c3845960a37d3ad47
164 Risk Score

Malware Insights

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

The PDF contains numerous external links, many hosted on compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The presence of a 'download button' lure further supports a phishing or malware distribution attempt. ClamAV detection as 'Pdf.Phishing.Trojan' strongly indicates malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://wastran.ru/uplcv?utm_term=paramedical+courses+under+keam PDF link annotation
    • https://www.hontoys.com.au/wp-content/plugins/super-forms/uploads/php/files/tv935t2eee2bo524qeeonjrrbu/32970629930.pdfIn PDF document text
    • https://extremetour74.ru/wp-content/plugins/super-forms/uploads/php/files/3402bbf0226fb6373245868b83b0ee0f/4257396995.pdfIn PDF document text
    • http://kosmonautika.ee/ckfinder/userfiles/files/16043928014.pdfIn PDF document text
    • https://senzedigicraft.com/wp-content/plugins/super-forms/uploads/php/files/a1c27ed8a6d584f495f8cc2aaebdc5f8/xelusazunogejoluvosulode.pdfIn PDF document text
    • http://bukharaatlanta.com/sites/default/files/file/76761738901.pdfIn PDF document text
    • https://camgloberealtor.com/userfiles/file/57505777341.pdfIn PDF document text
    • http://arch-teh.com/pic/userfile/38620114370.pdfIn PDF document text
    • https://www.aironface.com/wp-content/plugins/super-forms/uploads/php/files/d679922715987b5d108802d74922cacd/mixuwaseminedid.pdfIn PDF document text
    • https://www.psalighting.com/wp-content/plugins/super-forms/uploads/php/files/4a0dc0c8d1037db85e807cbc6354b03d/dajenovogipuvafujasaw.pdfIn PDF document text
    • https://www.ediliziaindustriale.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab5cffa5772---2805546102.pdfIn PDF document text
    • https://absolut-fit-and-dance.de/wp-content/plugins/super-forms/uploads/php/files/6ibocbjjt5v3ubhmr3pif9j4ms/rimekixemukibivigu.pdfIn PDF document text
    • http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607902e0b57a3---33716027722.pdfIn PDF document text
    • http://www.marcado.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607da0fe05532---20047679608.pdfIn PDF document text
    • https://hssipm.com/wp-content/plugins/super-forms/uploads/php/files/55987586eb5a39fc5f9b3de82f12d95e/lirivuduwizuvufepepejepil.pdfIn PDF document text
    • https://www.movingwithmagna.com/wp-content/plugins/super-forms/uploads/php/files/a2afb20f46708379b98063c4663576d5/petak.pdfIn PDF document text
    • http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/160da6dee78d3a---89595617045.pdfIn PDF document text
    • https://autosofortkauf.ch/wp-content/plugins/super-forms/uploads/php/files/p6pdb3fge06mfr946gk79euquf/46826707525.pdfIn PDF document text
    • https://thefencedocumentary.com/adminfiles/file/90792980117.pdfIn PDF document text
    • https://thehamptonsbloomington.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607174399ad73---jolomopivukoxawubebonakar.pdfIn PDF document text
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/0fc147f3c0a694c93bd230d1f4063037/86077270769.pdfIn PDF document text
    • https://broadstripe.com/wp-content/plugins/super-forms/uploads/php/files/ea4ff56dc514c2cebfcbd98684d2ae93/78983628282.pdfIn PDF document text
    • https://werbemittelag.ch/upload/file/sixotivupuzinapojaj.pdfIn PDF document text
    • http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/160c8f378f25b4---27345075672.pdfIn PDF document text
    • http://www.pointcookelectrician.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160757faab4cbb---fupafuzexizu.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_off0000fab1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAB1 10628 bytes
SHA-256: bc6b8cf9686a7b434089c3913d709f8d416e99f249c18c9e6105eb0b9f5dd2f7
font_01_sfnt_off000112f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112F2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012b04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B04 17340 bytes
SHA-256: 5d04be54fdbcee3f35bb02fe2fdbcd4d35919441c0a22bd36e0c5826e23607c5

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