Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fa0c1223a8547bd…

MALICIOUS

PDF

95.2 KB Created: 2021-08-14 03:53:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: 627a817b51a6286c47414a8d4aa0beea SHA-1: 79ef9b22d2d79b1478d3fd09b7493f6b0b3f9709 SHA-256: 5fa0c1223a8547bd7174c01c6271b800de4c874c152db7bbd69ca0b57b299a46
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, flagging it as a phishing trojan. It functions as a link farm, directing users to numerous external URLs, many of which are hosted on compromised WordPress sites. The primary purpose appears to be to lure users to malicious websites through deceptive links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://medvor.ru/uplcv?utm_term=argumentative+essay+techniques+pdf PDF link annotation
    • https://ropaalmayoreo.com/images/userfiles/file/tupipobimas.pdfIn PDF document text
    • https://rajaunited.com/contents//files/xumakux.pdfIn PDF document text
    • https://fa-vietnam.com/webroot/img/files/62830635843.pdfIn PDF document text
    • http://gezond-trakteren.nl/kasteel-doornenburg-img/bestandenfile/bafumibegenoxezodejo.pdfIn PDF document text
    • https://eandjfamilyhealthcenter.com/wp-content/plugins/super-forms/uploads/php/files/e0b2fec0bfc4ac809ba9f45cd2602c6c/25850353400.pdfIn PDF document text
    • https://zazilha.com.mx/wp-content/plugins/super-forms/uploads/php/files/4c1124080194088ca1fee2cdc21af2f2/44741282630.pdfIn PDF document text
    • http://hani-bee.com/userfiles/files/75268812597.pdfIn PDF document text
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c903167bdfa---17676011510.pdfIn PDF document text
    • http://donkaew-furniture.com/ckfinder/userfiles/files/mewijizimurusawijip.pdfIn PDF document text
    • http://alliusie.com/userfiles/file/28510849896.pdfIn PDF document text
    • http://michalpavlicek.com/uploaded/file/guzirifufijutamorojumura.pdfIn PDF document text
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ee021a4d680---82861930242.pdfIn PDF document text
    • http://liubeauty.com/luutru/files/zuketoradevomidusolifego.pdfIn PDF document text
    • http://dilimkebab.com/userfiles/file/53167435663.pdfIn PDF document text
    • http://evpltravel.com/xv_image/file/95746290532.pdfIn PDF document text
    • https://wentworthre.com/wp-content/plugins/super-forms/uploads/php/files/e7b15d7af0ec0ef131b160ba6a9667fd/lanogupusuzuvemik.pdfIn PDF document text
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160837a7e9399f---lowomeg.pdfIn PDF document text
    • https://seataclighting.com/wp-content/plugins/super-forms/uploads/php/files/a3386722d842c298694695f992888f8b/58884667211.pdfIn PDF document text
    • http://hugslock.com/app/webroot/img/files/40278131309.pdfIn PDF document text
    • http://penoplex24.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160b7ed6b85853---vudatobamogipin.pdfIn PDF document text
    • http://duz-drustvo.si/uporabnik/file/84221848150.pdfIn PDF document text
    • http://planet-for-events.de/userfiles/file/xatilitanifupijuwuduku.pdfIn PDF document text
    • https://biocoils.com/img/file/mofepelogepilozopuzi.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_off00010f6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F6C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012783.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12783 11308 bytes
SHA-256: 1b18b9d0624a460801a0fbc9de5aecb6dc9af56c7d6f7a48e5af47b8828a14c4
font_02_sfnt_off0001416e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1416E 17256 bytes
SHA-256: 1a3c83ff4fd96016758bb59f52f57552df0cfb301c08b457334256bb48b2ac27

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