Malicious PDF — malware analysis report

Static analysis result for SHA-256 659927cf8ccbc2bb…

MALICIOUS

PDF

72.2 KB Created: 2021-09-03 14:14:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 73d6281d67adf8e8d09b68cd3299bf08 SHA-1: cc131b87ffe794bc549247ff4071890b259e7a68 SHA-256: 659927cf8ccbc2bb57c514f6595cc4ea88e288024ae653e6e78f807be29c8cc4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link farm directing to numerous URLs, many of which are hosted on compromised CMS platforms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. No scripts were extracted, and the document body was unreadable, so the rationale is based on the URL analysis and heuristic firings.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://autoparkalbanese.it/file/20972570276.pdf In PDF document text
    • http://www.misshandicap.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16080c7e16e1eb---14195516553.pdfIn PDF document text
    • http://contextuae.com/resimler/files/23687756616.pdfIn PDF document text
    • http://alexforstarlight.com/clients/4/41/4125d763bdae894b2c088b8c4c0f4705/File/xasurasabudini.pdfIn PDF document text
    • http://zonazero.es/userfiles/file/repive.pdfIn PDF document text
    • http://www.tobywells.org/media/fckdir/file/1156060972.pdfIn PDF document text
    • http://www.goataxiservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac096929708---daziwomefedusawapogaxe.pdfIn PDF document text
    • http://cutskytools.com/d/files/pilosajutezidagadat.pdfIn PDF document text
    • https://seeandhearbetter.ie/img/shop//contents/mokozanuneta.pdfIn PDF document text
    • http://biancoacolori.it/userfiles/files/7179744780.pdfIn PDF document text
    • http://pvsystreports.com/wp-content/plugins/super-forms/uploads/php/files/77ohhldf08g051lpbdlibtrf13/pejudig.pdfIn PDF document text
    • http://www.johnknox.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc7ce160e9---99700671320.pdfIn PDF document text
    • https://stpetejazz.com/wp-content/plugins/super-forms/uploads/php/files/5smtohkct6emk60vcu1rck709s/49782120358.pdfIn PDF document text
    • https://maugli24.ru/wp-content/plugins/super-forms/uploads/php/files/dc8647cf0c3a4393c629be5574709c0e/gujifapapobepefufobebumot.pdfIn PDF document text
    • https://aimara-bg.com/userfiles/file/fisetavakixolasaso.pdfIn PDF document text
    • http://xn----9sbbnbtte4cyg.xn--p1ai/ckfinder/userfiles/files/dimefuwenetit.pdfIn PDF document text
    • http://taxfreepoint.com/file/68245081325.pdfIn PDF document text
    • https://nyig.com/files/file/xudovadinuxawoxan.pdfIn PDF document text
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1610f2c29c08d1---gudewonuzezetigojo.pdfIn PDF document text
    • https://daynexweb.com/upload/ckfinder/files/buvejo.pdfIn PDF document text
    • http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4cf03c3efa---gaxekobatuju.pdfIn PDF document text
    • https://vashadvokat82.ru/wp-content/plugins/super-forms/uploads/php/files/ce455da7f7479fb7454cc5f0d4f38acd/30277243213.pdfIn PDF document text
    • http://shinex-auto.com/userfiles/file/befipesapetozufigakojetix.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=vander%27s+human+physiology+pdf+drivePDF 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_off0000b8bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB8BD 11128 bytes
SHA-256: fd82bd8e436b4be88d35102eb540cc299abac401f180ea3e26262bd03f605fba
font_01_sfnt_off0000d24d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD24D 16064 bytes
SHA-256: 4218cbc8e7bdb9adb85125701b46b481af8f256399badbdddf5039fecad3f6ac
font_02_sfnt_off0000fb5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB5C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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