Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c1edceed3456f8d…

MALICIOUS

PDF

82.2 KB Created: 2021-09-03 03:16:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: ccdf0c14aa4345e264c6c43bf9cf6389 SHA-1: 3e4fa150ad617ceb605ff25ff18f48852666de99 SHA-256: 1c1edceed3456f8d1cd27d856134988350aac3994523941dc99a31e36f6b750b
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised websites and disposable hosting, suggesting it's part of a link farm designed to redirect users to malicious content. The presence of external URIs and the nature of the links strongly suggest a phishing or malware distribution campaign, likely initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://oniceh.ru/uplcv?utm_term=swine+flu+information+in+marathi+pdf PDF link annotation
    • https://www.adelaarenergy.com/wp-content/plugins/super-forms/uploads/php/files/c0lkvk12ucsktpps9042fiirtm/kovaliv.pdfIn PDF document text
    • http://kompletucetnictvi.cz/files/file/galaxazawefarex.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/a3f2d00537b6209309085cd6e1d7684a/82401765795.pdfIn PDF document text
    • http://fincasotilloviejo.es/files/sotillo/_repo/file/pewunekora.pdfIn PDF document text
    • http://vegasoft.hr/wp-content/plugins/formcraft/file-upload/server/content/files/16095b1c7579f5---17016216904.pdfIn PDF document text
    • https://exihomes.com/userfiles/files/24055829498.pdfIn PDF document text
    • https://madspot.dk/ckfinder/userfiles/files/2080213702.pdfIn PDF document text
    • http://canxetaidientu.com/images/file/95496654368.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16110b20192e20---kosopomesavelilumaz.pdfIn PDF document text
    • http://geniuschulatutor.com/userfiles/files/bifazajusule.pdfIn PDF document text
    • http://xn--80aaeiengkwpz6p.xn--p1ai/pub/file/68513552958.pdfIn PDF document text
    • http://klubalfa.org/img/userfiles/file/vavekezujanajuroxovafi.pdfIn PDF document text
    • http://omonetach.pl/foto/ilustracje/file/mudixivuwujekipapivuwoxi.pdfIn PDF document text
    • http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160a1b868d8872---67465658425.pdfIn PDF document text
    • http://tryinvest.eu/userfiles/files/95130926221.pdfIn PDF document text
    • https://inchirieriavioane.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16095d554352c6---7849164749.pdfIn PDF document text
    • https://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/160c2f3696ddcb---sugiwukawudawufe.pdfIn PDF document text
    • http://edwindijk.nl/home/edijk/domains/edwindijk.nl/public_html/uploads/file/56365790603.pdfIn PDF document text
    • http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/160de3b5b0a0d2---mebofireja.pdfIn PDF document text
    • http://geasit.it/userfiles/files/6027383273.pdfIn PDF document text
    • https://www.accidentinjurylascruces.com/wp-content/plugins/super-forms/uploads/php/files/p9dbfs5b7ohn0k934ojhatd3qd/dovopum.pdfIn PDF document text
    • http://bilmatbasim.com/userfiles/file/64143926549.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/8798730380.pdfIn PDF document text
    • http://karlsbach.de/userfiles/files/vamupot.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_off0000de36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE36 10856 bytes
SHA-256: c25a65691fa863783f3e67f5b03dba1269120dfd38cbe5f7ec786e95272a08fd
font_01_sfnt_off0000f71d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF71D 16724 bytes
SHA-256: 031fbf8996446b2242da520c031f5c290507702f91b66396778556e1e5eb0b5b
font_02_sfnt_off0001228a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1228A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1