Malicious PDF — malware analysis report

Static analysis result for SHA-256 769be4009ec6e0f2…

MALICIOUS

PDF

93.9 KB Created: 2021-07-19 00:43:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-17
MD5: 896ce7dc25ac8e001b7bd16b93976446 SHA-1: 3ee4815b2cd0677b937afbe847d11ea7ba8b145e SHA-256: 769be4009ec6e0f2caee2fe31fab4a289af992a9b64003faf790a75f83840b42
256 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan payload. It contains a link farm directing to multiple domains, some of which are hosted on compromised WordPress sites, suggesting a phishing or credential harvesting attempt. The embedded polyglot PDF also contains suspicious findings, further supporting its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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
  • Secondary embedded PDF body has suspicious static findings high POLYGLOT_CHILD_PDF_STATIC_TRIAGE
    A valid PDF body was found at a nonzero offset inside another container and its carved contents matched PDF exploit or lure heuristics. This catches polyglots where the top-level magic routes to ZIP/OLE while a PDF reader or downstream parser opens the hidden PDF payload.
  • 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://nextgt.eu/uploads/file/jotirujokinosiviperomene.pdf In PDF document text
    • http://contactconfiance.com/files/files/vasoruga.pdfIn PDF document text
    • http://101-games.ru/images/uploads/files/66420638923.pdfIn PDF document text
    • https://mebelpozakazu.ru/wp-content/plugins/super-forms/uploads/php/files/903c5b03470762d612fbc2bd884fe5ea/10465358297.pdfIn PDF document text
    • http://archissimo.eu/userfiles/files/99559129239.pdfIn PDF document text
    • https://dermo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d4b07a27f65---xasutuvinali.pdfIn PDF document text
    • http://www.norestim.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160e76e5201bde---negabitari.pdfIn PDF document text
    • https://spencershaulageltd.co.uk/wp-content/plugins/super-forms/uploads/php/files/4f2d31b642a0521a89b52d78b3556073/gememusidalemelijulikafe.pdfIn PDF document text
    • https://pharmnet.cz/ckfiles/files/files/rukexufelexikegezuxu.pdfIn PDF document text
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dc8f3bcd71---98264282168.pdfIn PDF document text
    • https://ascinfratech.com/clientprojects/trading/file/49636812102.pdfIn PDF document text
    • https://anmoul.com/userfiles/file/80395349536.pdfIn PDF document text
    • http://ridendo.cz/files/file/62817373284.pdfIn PDF document text
    • http://cetinelektrik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160b5f9a1eee0a---xewulo.pdfIn PDF document text
    • https://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/160be7b02939a0---topegapivaruwuxisuneg.pdfIn PDF document text
    • https://pellevah.com/upload/files/nedemogi.pdfIn PDF document text
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160e3fa3b55ad4---4484121879.pdfIn PDF document text
    • https://www.dentaltaxpros.com/wp-content/plugins/super-forms/uploads/php/files/21eeddace33a097695c2f8efeffbf159/kubazolasejivemoxaze.pdfIn PDF document text
    • https://www.edutechusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083410b421e6---34629418453.pdfIn PDF document text
    • http://2017.letnifestiwal.pl/ckfinder/userfiles/files/nulebuxexa.pdfIn PDF document text
    • http://topas.lt/userfiles/file/mowasoku.pdfIn PDF document text
    • http://www.opencalgary.org/wp-content/plugins/formcraft/file-upload/server/content/files/160bc545d5a279---32967897137.pdfIn PDF document text
    • https://www.enterpriselighting.com/wp-content/plugins/super-forms/uploads/php/files/5b8aec4e2ee2a8214639d0c5f77b025d/sosazilunovifonexu.pdfIn PDF document text
    • https://indiantalentjunction.com/milan/media/39246318121.pdfIn PDF document text
    • https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ec981ad9678---bazokikubibagobojomat.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=examples+of+psychomotor+activityPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010cc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CC0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000124d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124D2 17244 bytes
SHA-256: ce5f6df005834b2843941db60f6d79e5d089541985e387ad62782968b59f1d54
font_02_sfnt_off00015123.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15123 10904 bytes
SHA-256: d5bd81484210c7fd5a9b6291b9f0ee7c579ad4534a6ffd20a0644d2bad797c6d
polyglot_child_pdf_off00001b1f.pdf polyglot-child-pdf Secondary PDF body inside pdf container at offset 0x1B1F 89237 bytes
SHA-256: 1066082bf55813ccb2b458fb48b0dc43c9f31903e81f019a3ec97b2dc5a0e7b8
Detection
ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
Obfuscation or payload: unlikely

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