Malicious PDF — malware analysis report

Static analysis result for SHA-256 808729b0c75e4c9f…

MALICIOUS

PDF

96.8 KB Created: 2021-06-27 19:33:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 17ea6b49ea8855211b743d18c0d14a55 SHA-1: e45ba351df8c9ff86575512a7a048fc9938a66ac SHA-256: 808729b0c75e4c9fc27bec48cb0ce7413213cc9bbcee15cce0ad0af48801f064
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. It contains numerous links pointing to compromised websites and disposable hosting, suggesting it functions as a link farm to redirect users to malicious content. The embedded URLs, such as 'https://wastran.ru/uplcv?utm_term=remote+neural+monitoring+lawsuit', are likely part of this redirection scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9936

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://wastran.ru/uplcv?utm_term=remote+neural+monitoring+lawsuit PDF link annotation
    • https://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/6914kmha564811f7pofam2nu1r/febaxaf.pdfIn PDF document text
    • https://popcouncilinstitute.org/wp-content/plugins/super-forms/uploads/php/files/d191a898c430ead4f34de1476ae66c87/giteve.pdfIn PDF document text
    • http://www.farparts.cl/wp-content/plugins/formcraft/file-upload/server/content/files/16075635aa97a8---45849826233.pdfIn PDF document text
    • https://moolans.com/uploads/files/xinuvufutabinexak.pdfIn PDF document text
    • http://optimus.org.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607776eb3d7e2---38953493214.pdfIn PDF document text
    • https://www.adelaarenergy.com/wp-content/plugins/super-forms/uploads/php/files/0viumj337hfianbrk0jhvhmdfv/zanuveruzuzaxupevutolozo.pdfIn PDF document text
    • https://arvikabc.com/images/uploadedimages/file/tusetifagibuxir.pdfIn PDF document text
    • http://togetherwewalkny.org/clients/2/24/2411cc079aa0f0d7fd57f81c6163ecfd/File/jiluzig.pdfIn PDF document text
    • https://funkydrop.shop/wp-content/plugins/super-forms/uploads/php/files/60b762917ec36930020d832dc68cf59f/47981057060.pdfIn PDF document text
    • http://piri-piri.pl/ckfinder/userfiles/files/beduzosu.pdfIn PDF document text
    • https://thetitangroup.ca/wp-content/plugins/super-forms/uploads/php/files/48f8a6e0c7f8e0deed13e243c5809ee5/nuweti.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac53978410d---59917225412.pdfIn PDF document text
    • http://alexlunacoach.com/img/editor/file/57555334531.pdfIn PDF document text
    • https://www.parkgest.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160a20c83d6463---fiwelovopuzitasez.pdfIn PDF document text
    • https://bechtoldpaving.com/wp-content/plugins/super-forms/uploads/php/files/b1aa740d5b0deb21cfc2cf1973cdba10/95222741811.pdfIn PDF document text
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9612ed6ebb---dokogonugo.pdfIn PDF document text
    • https://frasertechno.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a06f80ce7bb---94377022180.pdfIn PDF document text
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072b1cb4a9e7---30731497829.pdfIn PDF document text
    • http://kingcraftviet.com/uploads/ckfinder/files/90444180283.pdfIn PDF document text
    • https://bluetact.com/locktactyuma/userfiles/file/93734740696.pdfIn PDF document text
    • https://pluviaterra.mx/wp-content/plugins/super-forms/uploads/php/files/0b7b4049412bf91e6d0b74d7f6180c52/38391502666.pdfIn PDF document text
    • https://www.brunosistemi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160781e1fabed4---tonorusuxelejuwugibiza.pdfIn PDF document text
    • http://stroisvias.ru/userfiles/file/wajijefizigasib.pdfIn PDF document text
    • http://boulderdivorcelaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5396befc31---34673313458.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000113cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113CD 10684 bytes
SHA-256: e9dab0563530576ee79409cdd7b0c1d06e30678ea123fbed2528c92b5ca080be
font_01_sfnt_off00012c58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C58 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001446a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1446A 19576 bytes
SHA-256: 0365f3c304d9acccdfee15b49e8867ab2867501440f4c8626f12b8894211809a

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