Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a575e3ff50afa43…

MALICIOUS

PDF

80.9 KB Created: 2021-09-18 06:11:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: d4c6a785c5d007314381eb042deca0d9 SHA-1: ae0b85bba0a0d4604f4951d2a8ba8592f434b64c SHA-256: 8a575e3ff50afa4321dd72304be8fa44ccf3a663cd0720f448cc9aa07d9808c8
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

This PDF document was flagged by multiple heuristics, including a high-confidence ML classifier and ClamAV detection as a phishing trojan. The 'SE_CLICKFIX' heuristic indicates the document likely contains social engineering designed to trick the user into executing a command. The presence of numerous links to PDF files hosted on various domains suggests a link farm or redirection mechanism, potentially for malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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://www.ondebiz.com/userfiles/file/xawidexulexoxarapajefuv.pdf In PDF document text
    • http://forglory.cz/ckfinder/userfiles/files/nowefewabagedadus.pdfIn PDF document text
    • https://corpeverest.com/ckfinder/userfiles/files/43838124734.pdfIn PDF document text
    • http://saxonrt.hu/img/userfiles/files/78341548822.pdfIn PDF document text
    • http://ok-poland.com/userfiles/file/xiwajujefotukemusoxuz.pdfIn PDF document text
    • http://studiomuraca.eu/userfiles/files/joruzosetidalafuru.pdfIn PDF document text
    • https://www.blackandwhite-salon.com/wp-content/plugins/super-forms/uploads/php/files/tmp/zibarofedepedosifid.pdfIn PDF document text
    • http://smartdeal.pl/files/upload/files/58797690828.pdfIn PDF document text
    • https://sausalito.com/wysiwygfiles/file/93194835685.pdfIn PDF document text
    • http://curry-box-deluxe.de/userfiles/file/25326389357.pdfIn PDF document text
    • https://thriveelearning.com/wp-content/plugins/super-forms/uploads/php/files/65291d326b1f8967e58965d23e2c39b2/dumirulipuwegirurezil.pdfIn PDF document text
    • http://sochi-vitrazhi.ru/ckfinder/userfiles/files/rufodafu.pdfIn PDF document text
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/92808586532.pdfIn PDF document text
    • https://abrasco.org.br/ckfinder/userfiles/files/77564330650.pdfIn PDF document text
    • http://minhquoc.vn/ckfinder/userfiles/files/98370467489.pdfIn PDF document text
    • http://erfolgsapp.de/wp-content/plugins/formcraft/file-upload/server/content/files/16137c5ef349ab---kaziba.pdfIn PDF document text
    • https://gadesign52.com/uploads/files/202109061655131466.pdfIn PDF document text
    • https://www.getfitcrew.com/wp-content/plugins/formcraft/file-upload/server/content/files/161320bf27a988---5179362515.pdfIn PDF document text
    • https://travelsafeway.com/userfiles/file/48198721397.pdfIn PDF document text
    • https://cutletsmeat.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c0c76daff2---zuwuw.pdfIn PDF document text
    • http://ivankotov.ru/img/lib/file/valizodid.pdfIn PDF document text
    • https://www.drserapkagan.com/wp-content/plugins/super-forms/uploads/php/files/p38s96njnb723jaunu8uju5ruq/mamupali.pdfIn PDF document text
    • http://seoaudytor.pl/userfiles/file/2170009577.pdfIn PDF document text
    • https://dermo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613bf42cf3702---nixalakigiji.pdfIn PDF document text
    • http://slesnick.net/userfiles/files/bavudisevotoruxosevo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=how+to+recover+formatted+sd+card+on+android+phone+without+computerPDF 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_off0000d725.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD725 11084 bytes
SHA-256: 01fa645746108cd48e459b8bfdce54d482f135fce37189064da93a27e0bef836
font_01_sfnt_off0000f0cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0CC 17368 bytes
SHA-256: 3a315b7644c0ea78a42dd7550bae98d030175110072315f88e4d02f144f4e82a
font_02_sfnt_off00011d59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D59 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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