Malicious PDF — malware analysis report

Static analysis result for SHA-256 da0809b587df362b…

MALICIOUS

PDF

98.3 KB Created: 2021-09-08 11:50:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 345196ac7ff993b435b121d94da13041 SHA-1: 92b90eff8c3f6a822ff0b3e2a7178e1fd501f9b1 SHA-256: da0809b587df362b28a053b8f37df112a17b0900b5854a24bac54066b6eb2947
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of external URIs and the overall structure indicate an attempt to lead users to phishing sites or download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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
  • 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://medvor.ru/uplcv?utm_term=stahlwille+manoskop+730d%2F20+manual PDF link annotation
    • http://logiccpacma.com/ckfinder/userfiles/files/44312235929.pdfIn PDF document text
    • https://tehnol.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609662dc4c57d---33872427309.pdfIn PDF document text
    • https://fedico.ca/upload/editor/file/79741789414.pdfIn PDF document text
    • http://dilimkebab.com/userfiles/file/gezalowiriwipewoxene.pdfIn PDF document text
    • http://anthonyvienna.com/sites/default/files/file/90501248709.pdfIn PDF document text
    • http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b18e1742cd7---jidefuzenoraju.pdfIn PDF document text
    • http://bodegaadrover.com/userfiles//imagenes/23541631818.pdfIn PDF document text
    • https://f1com.ge/wp-content/plugins/super-forms/uploads/php/files/9c64da6ee40846bc27c4c702993d5111/kazoto.pdfIn PDF document text
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/160d6a8b5c6328---2365100686.pdfIn PDF document text
    • https://glycocalyx.nl/userfiles/image/file/rasig.pdfIn PDF document text
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/160be3bde1e3b1---88608532294.pdfIn PDF document text
    • http://icltindia.in/userfiles/file/41452705.pdfIn PDF document text
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b435985e35b---ribuzejoni.pdfIn PDF document text
    • https://asigurareingermania.ro/wp-content/plugins/super-forms/uploads/php/files/bar5msi3boisj4j4ae8fvkm777/93254053598.pdfIn PDF document text
    • http://vasilii-orlov.fun/wp-content/plugins/super-forms/uploads/php/files/663dcddfd38d98fc784125d37c23e9cd/bitisi.pdfIn PDF document text
    • http://schokofontaenen.de/idata/7175367561.pdfIn PDF document text
    • http://booklandbooks.com/userfiles/file/97893311947.pdfIn PDF document text
    • https://cradlegold.com/wp-content/plugins/super-forms/uploads/php/files/buai99p5atjfbrteha6cekdfek/putojapifimune.pdfIn PDF document text
    • http://ural-kip.ru/admin/ckfinder/userfiles/files/nopupejabolejogawixe.pdfIn PDF document text
    • http://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/16078763f769fc---94367019936.pdfIn PDF document text
    • http://clairvoyantinfotech.com/demo/images/zapexowuromeratagekideju.pdfIn PDF document text
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4599e5c423---dagukakufexilete.pdfIn PDF document text
    • https://airflow-skateboards.com/upload/file/52630820379.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_off00010d1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D1D 21980 bytes
SHA-256: d0a14e642422c1f30728e256f42eca9cdfea6cecdfb713af54ff2ab6d02b9dc1
font_01_sfnt_off000146e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x146E8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00015eff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15EFF 11408 bytes
SHA-256: 629feb58ffe79a8c17bc1965327fa27b4c70c384fe73ae24e0081b58001be23e

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