Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d3f1f55777b9940…

MALICIOUS

PDF

91.3 KB Created: 2021-06-29 08:33:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: dd82263c7d86c26ea99b6a3eae2a1053 SHA-1: 0772eb8c940896e277c3e7bf383b2e300344e3a6 SHA-256: 7d3f1f55777b9940c45392a597088f918eec7e66d874468126092bd7dcfe9dec
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links pointing to compromised WordPress sites, indicating it functions as a link farm to distribute malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely involving exploitation of PDF vulnerabilities to redirect users. The presence of multiple distinct hosts and the use of 'utm_term' parameters in some URLs suggest a phishing or scamming attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 6

  • 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.
  • 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://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c73f5affdd---guzetokegitufuvasejudud.pdf In PDF document text
    • https://happycustomerservice.com/wp-content/plugins/super-forms/uploads/php/files/23e5b2e3754060760496b161b93972c8/29775547963.pdfIn PDF document text
    • http://piemonteforyou.it/userfiles/file/semekijutumedeman.pdfIn PDF document text
    • https://www.hdontheroadnapoli.it/wp-content/plugins/formcraft/file-upload/server/content/files/160bcd9e1e68eb---jevetijilapirum.pdfIn PDF document text
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1607966efb065d---90664257209.pdfIn PDF document text
    • https://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/94f0dec3962509c3cdb169dfe31f6313/23541155384.pdfIn PDF document text
    • https://estidevelopers.com/wp-content/plugins/super-forms/uploads/php/files/5b0ba4b4cba6ae811ab914d53c35ee2d/64523079969.pdfIn PDF document text
    • https://www.taxiserviceh24.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b00aa3f56b---73125876934.pdfIn PDF document text
    • https://pioneerlift.com/upfiles/editor/files/12114116156.pdfIn PDF document text
    • https://thealloywheelcentre.co.uk/wp-content/plugins/super-forms/uploads/php/files/4fea8a0c73427fb0eb53d037505b2772/41369214427.pdfIn PDF document text
    • https://personalloan2u.com/wp-content/plugins/super-forms/uploads/php/files/8d50e5f9a158e3269e2557a2f61063c7/runita.pdfIn PDF document text
    • https://parc-hotel.info/file/xajapuzizu.pdfIn PDF document text
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609caf66dd18a---jiluzoz.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cddeba56153---tinamidimafabediwem.pdfIn PDF document text
    • https://beaufortbond.com/wp-content/plugins/super-forms/uploads/php/files/af7fd04411baa786724509b8a25a65cc/mejadovu.pdfIn PDF document text
    • http://xn--9p4b29dncp2cc6y.net/upload/fckeditor/file/54575788838.pdfIn PDF document text
    • https://www.emmabowman.com/wp-content/plugins/super-forms/uploads/php/files/3f6f32c451679eb66ba07e3c6029577c/92930882974.pdfIn PDF document text
    • http://www.wallisandemmanuel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608346165dd41---50724409142.pdfIn PDF document text
    • https://aynadakikemalizm.com/resimler/files/tixaxa.pdfIn PDF document text
    • https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606f46807a035---98386338157.pdfIn PDF document text
    • http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/1608f0ec97c750---nifabox.pdfIn PDF document text
    • http://villa-carlshorst.de/sites/default/files/file/xumatanatovedosodupener.pdfIn PDF document text
    • https://studio45.live/wp-content/plugins/super-forms/uploads/php/files/fch4huhlkhopsoadmrq5m3b8go/68895448249.pdfIn PDF document text
    • http://pvsystexperts.com/wp-content/plugins/super-forms/uploads/php/files/9flo3o0mmc3trmrq0k6e326v74/wamurosiwojozuwedij.pdfIn PDF document text
    • https://alismobile.co.uk/wp-content/plugins/super-forms/uploads/php/files/608271770ede5ce1d513e2dda410d35e/72927468439.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=disaplinary+wives+clubPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000101c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101C2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000119d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119D9 10656 bytes
SHA-256: 086f7de0ac5aeecc37ddcac57f806102c526c8cfcf04bea6ccb44c244d85a742
font_02_sfnt_off00013231.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13231 17428 bytes
SHA-256: d341029235ac321981afda65356b9b3407169e320d1de634e6148a26e7ee284e

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