Malicious PDF — malware analysis report

Static analysis result for SHA-256 ceea34a0b6877ded…

MALICIOUS

PDF

87.2 KB Created: 2021-06-28 11:15:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e936aa25932c8dc406fe95d6954908aa SHA-1: 6668c906d8d90e3aee1b7a3ad7e72b8f5e4233d4 SHA-256: ceea34a0b6877dedda0888131f13b774b2f5b7496cd6b9c398228bfaf8534a05
164 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, hosting numerous URLs on compromised WordPress sites, likely to obscure the true destination. The presence of a 'download button' lure further supports a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fcc0f59656---94154701839.pdf
    • https://razvozka24.ru/wp-content/plugins/super-forms/uploads/php/files/bbb3e415d8964eead58366ee0b019dfd/66150936957.pdf
    • http://braintradingbcn.com/wp-content/plugins/super-forms/uploads/php/files/418c2af767bc61de1fe2404990fde2e0/88682601113.pdf
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/16071a43d460ea---fidepopaxexozopis.pdf
    • https://citronel.com/userfiles/files/dijusanupaluvawosolaf.pdf
    • https://www.indee-r.fr/wp-content/plugins/super-forms/uploads/php/files/de58b9f31beda6703abe773d4af0c354/jorukosoxuxato.pdf
    • http://ophirtonhotel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607e5c9f37127---razofopomirapod.pdf
    • http://kzlo.pl/fotki/fotki/file/3166673727.pdf
    • http://suachuaspa.com/upload/images-content/files/40648592499.pdf
    • https://www.reliancecareuk.com/wp-content/plugins/super-forms/uploads/php/files/59224afde1e1b580435f541da852b4ab/vamujufaribilejunim.pdf
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/160d29ac02f590---foporiwiv.pdf
    • https://canadiancontractorservices.com/wp-content/plugins/super-forms/uploads/php/files/i9k88jood30tq58b01jinauot7/parabifafegufokepalifefa.pdf
    • http://stroynerud-sm.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608dbdfb2f4ac---71220978548.pdf
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084445e2332b---xuwafagi.pdf
    • http://jirehenl.com/userfiles/file/210550306179.pdf
    • http://rusiuojigalvoji.lt/wp-content/plugins/formcraft/file-upload/server/content/files/160b9c579c8dc5---55092490682.pdf
    • https://svetpoznaniyaonline.ru/wp-content/plugins/super-forms/uploads/php/files/67e7ec6f4d016a6a976ada945eb450cc/puwererebiviwawosuva.pdf
    • https://jairdefreitas.com/ckfinder/userfiles/files/87667532349.pdf
    • http://sieuthivatlieuhoanthien.com/upload/files/6610271282.pdf
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3adf84c4f0---famuto.pdf
    • https://mkting.com.co/wp-content/plugins/super-forms/uploads/php/files/abf6198620748cfd169ddcedc0f9c1d3/lifatodujam.pdf
    • https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c488680652c---56967088709.pdf
    • http://matrixuniverzum.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160c9754bcc74e---20461808868.pdf
    • http://emeraldcovepartners.com/_data/images/file/mapulenijuw.pdf
    • http://geology.ie/wp-content/plugins/formcraft/file-upload/server/content/files/1607f8965777f5---remuwukajasax.pdf
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/1609048c6d74d4---26702028295.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=fractions+in+order+of+size+calculator
    • 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_off0000f0c0.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF0C0 16792 bytes
font_01_sfnt_off000108d7.bin
fab4cad69b7a32219154e7c4017b72b9a1e6f7afd0d6a94b94e33820bac7fca5
pdf-font-stream PDF embedded font (sfnt) at offset 0x108D7 10604 bytes
font_02_sfnt_off0001213a.bin
90322403cdf08a754d1514f853660194f34c9be1eb787607200286d014a95a86
pdf-font-stream PDF embedded font (sfnt) at offset 0x1213A 17448 bytes