Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c2d33a53e7a4405…

MALICIOUS

PDF

77.1 KB Created: 2021-09-01 23:17:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: cd8678109a33e59faf1129bc84d17c28 SHA-1: ee625b2a1486564532f85e83cceb6e67f8dc883a SHA-256: 6c2d33a53e7a4405288e9c1ded7e18f7a6bd60eeedd9623d3f9a7c0ca95b60a0
156 Risk Score

Malware Insights

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

This PDF file was detected as a phishing trojan by ClamAV and ML classifiers. It functions as a link farm, with numerous embedded URLs pointing to compromised WordPress sites and other disposable hosting. The primary purpose appears to be directing users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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 http://outspokenholland.com/userfiles/fckFile/20210719192516.pdf
    • https://primax.fr/wp-content/plugins/super-forms/uploads/php/files/6mudo7g8rp3rotistrf0u8g3r4/76141631173.pdf
    • https://www.intermediastudios.com.mx/wp-content/plugins/super-forms/uploads/php/files/5cff4e2282fdcb6609821f674aadbbd4/36257338093.pdf
    • http://dulichgiahy.com/upload/file/96446414724.pdf
    • http://reiki-roots.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609e9018871be---dujibezexafodokobujarip.pdf
    • https://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fcd2afcdfc5---mudamo.pdf
    • http://studioschicchi.eu/userfiles/files/97499563193.pdf
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/c14c6866f835e942d584c89b95644401/nigejoduvate.pdf
    • http://dorapeyzaj.com/userfiles/file/gijomofugik.pdf
    • http://getampedmag.com/ckfinder/userfiles/files/dejovajipudexa.pdf
    • http://wonderful-foods.net/userfiles/file/kuwebitovusob.pdf
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/cjt49dt559shl7110ltmrr5n5l/novuzuxufokonazilag.pdf
    • http://hodoan.net/userfiles/file/17534931749.pdf
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160bfce0a276f5---26917439090.pdf
    • http://allseasonsart.com/uploads/fck_uploads/file/24731278226.pdf
    • http://reiki-roots.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c8963c6e5b7---96756081056.pdf
    • http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160f037c320fd3---36350244000.pdf
    • https://kolodezrus.ru/wp-content/plugins/super-forms/uploads/php/files/64e411c5adcee0f716e8a76a29560ba9/mitupogirekozowelebodoz.pdf
    • https://www.edutechusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ed02977ca8---garivufor.pdf
    • http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0fec09d89a---fumuninefatikenirud.pdf
    • http://noavarservice.com/ckfinder/userfiles/files/pesebozibezilapaluf.pdf
    • https://stefandes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e96909cbed---77118149057.pdf
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab519ddb68c---90184120225.pdf
    • http://plise.org/userfiles/file/70336872375.pdf
    • https://mindweave.co.uk/wp-content/plugins/super-forms/uploads/php/files/loodgaj0o21hcqami56l73ghqu/27702185125.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=this+is+to+convince
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c954.bin
57e541136e10f2df14ced2b85b1f612792a0f0c3fe33c4b28e6d73af3478a4bf
pdf-font-stream PDF embedded font (sfnt) at offset 0xC954 10048 bytes
font_01_sfnt_off0000dfb7.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xDFB7 16792 bytes
font_02_sfnt_off0000f7c9.bin
d521f83b5b74bb6aa8e3224445942d61bf32368b53921318cc004c0f3fe5b9f6
pdf-font-stream PDF embedded font (sfnt) at offset 0xF7C9 18160 bytes