Malicious PDF — malware analysis report

Static analysis result for SHA-256 db1383c18705de32…

MALICIOUS

PDF

79.2 KB Created: 2021-06-26 02:27:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 69a339973d76df884c105af51379d509 SHA-1: 4faff4fa740c31eeeac8caa4048cdba5cf955653 SHA-256: db1383c18705de3286fb9c9a0bedb981232f3f0341e4fef4a7f6a750ec0db6b9
156 Risk Score

Malware Insights

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

The file was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. The PDF contains numerous links, many pointing to compromised WordPress upload directories, suggesting a link farm designed to host or redirect to malicious content. The presence of multiple external URIs and link farm heuristics strongly suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://carpanea.it/wp-content/plugins/super-forms/uploads/php/files/a89e018f23898bb782128a37206fbfe8/69233703058.pdf
    • https://www.hotwaterfactory.com.au/wp-content/plugins/super-forms/uploads/php/files/bf0847a904ad81e4f7a0d889a5f3b2ee/kuxekidafetunulupowilolu.pdf
    • https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a032a27fbcb---22201446951.pdf
    • http://alhouti.com/userfiles/file/fawijobisov.pdf
    • http://geyikkimya.com/userfiles/upload/file/4735947258.pdf
    • http://tikatalog.sk/_files/file/48712975916.pdf
    • http://for-rent-leuven.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607496d2618ef---72495681541.pdf
    • https://fotobolfestmeny.hu/mvc/userfiles/file/50999032017.pdf
    • http://joy05.com/_UploadFile/Images/file/58391704654.pdf
    • http://hglobaltour.com/FileData/ckfinder/files/20210602_71F3CEC173C9DF4C.pdf
    • https://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a094d9d9f6---49913837402.pdf
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d60380fc66---nedabujabamovax.pdf
    • http://cedule-plachty.cz/files/file/nadosejifanudututa.pdf
    • https://thriveelearning.com/wp-content/plugins/super-forms/uploads/php/files/9e37d6f6acad660534bc3b0b45f4d5f9/7871588539.pdf
    • https://www.higher-energy-trampolineclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/160937b5f8c49d---55385350427.pdf
    • http://conroeclassof72.com/clients/d/de/de0acc14889d5d69ce6a2e221f3e79cd/File/77555077665.pdf
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609767489df53---giwowatasikodatejakegijew.pdf
    • http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/160bfa56971a22---3087067601.pdf
    • http://sinara.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c163438ee22---bafuluvefamugenene.pdf
    • https://ethiquedevelopers.com/wp-content/plugins/super-forms/uploads/php/files/4ce972476702147d1320e17f18269478/kixaguvebesodorutodalok.pdf
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160704db271bf7---99611606810.pdf
    • https://premiumvipbusiness.com/wp-content/plugins/super-forms/uploads/php/files/102a65e834ce0198b6354543bc5e14ab/80438227556.pdf
    • http://tfh-filter.hu/_user/file/81543506843.pdf
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d3c69ba765---76408210309.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=proctitis+and+colitis
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d619.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xD619 16792 bytes
font_01_sfnt_off0000ee30.bin
2e66ee239836dd028c914a17e6640659e69b84225d7f5ccbf370ac2c62b73c2c
pdf-font-stream PDF embedded font (sfnt) at offset 0xEE30 10232 bytes
font_02_sfnt_off0001053c.bin
912e9281569cb34bc7b8142d933fb151796b006814faee0680b0a9fbb6ea7f43
pdf-font-stream PDF embedded font (sfnt) at offset 0x1053C 16344 bytes