Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e391a32d6729b95…

MALICIOUS

PDF

107.9 KB Created: 2021-07-30 20:14:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 4c2d04c444fe635160bff340c7f1a9f4 SHA-1: dca0d35255108886b51410fe761a70ddb2dfb50e SHA-256: 9e391a32d6729b95bc5223f78a54bc572b5dde38b81b9dd6c8fd3681ac2b3843
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised WordPress uploads or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are consistent with a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/160d02da4a5619---85296461601.pdf In PDF document text
    • https://nolimitscenter.be/peausitive/images/FCKeditor/file/63147184476.pdfIn PDF document text
    • https://autoschiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/160acf19ee25ed---zufisogomape.pdfIn PDF document text
    • https://forcechicago.com/wp-content/plugins/super-forms/uploads/php/files/042caf2465ad477dc4c06f9c521ab96f/22323938301.pdfIn PDF document text
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b99ce16856a---58446035106.pdfIn PDF document text
    • http://weberstellen.ch/userfiles/file/75846109839.pdfIn PDF document text
    • http://cuoredicane.it/userfiles/files/31823903128.pdfIn PDF document text
    • https://ukdirectremovals.com/wp-content/plugins/super-forms/uploads/php/files/60e1a18c71947a9b052d6ff2d821290a/39129314653.pdfIn PDF document text
    • https://christembassyromford.org/wp-content/plugins/super-forms/uploads/php/files/a98a45703aecd3d3e5817930df026827/rifar.pdfIn PDF document text
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/160965166aecd1---kitokadarofovozid.pdfIn PDF document text
    • http://tantex.org/tantex/tantexuserfiles/file/zagipuxapefabunu.pdfIn PDF document text
    • https://angkagenap.com/contents//files/podoxisidepivowulabisarez.pdfIn PDF document text
    • http://www.playerclub.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160bbe639b5c17---48286105744.pdfIn PDF document text
    • http://mfcwestenkwartier.nl/beta/userfiles/file/96593354969.pdfIn PDF document text
    • http://villalapinetafavignana.it/userfiles/files/danaduvazanaf.pdfIn PDF document text
    • http://eko-inwest.eu/upload/file/movarubexazilefuxavetegi.pdfIn PDF document text
    • http://ranahytta.com/ckfinder/userfiles/files/lipezogasebolewawubud.pdfIn PDF document text
    • http://crescentcarpets.com/userfiles/file/50994367420.pdfIn PDF document text
    • https://thedestinbeachhouses.com/wp-content/plugins/super-forms/uploads/php/files/68bd18b5efc677f49c823e660c8abbd2/9645278330.pdfIn PDF document text
    • https://www.hdcorp.com.br/wp-content/plugins/super-forms/uploads/php/files/p7u998jv77dq5u8mska78knr41/lutesibakarev.pdfIn PDF document text
    • http://www.supair-lux.hu/ckfinder/userfiles/files/goravegozukadojeveton.pdfIn PDF document text
    • http://www.rec39.ru/wp-content/plugins/super-forms/uploads/php/files/6b86763ac0f503e5ee5ce12fa0288917/toduxekoxukixir.pdfIn PDF document text
    • https://www.nrlandscapes.co.uk/wp-content/plugins/super-forms/uploads/php/files/b80d6e66ba068559998c7664c4c0bf85/72818158748.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=uso+de+las+funciones+trigonometricas+en+la+vida+cotidianaPDF 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_off0001396d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1396D 20068 bytes
SHA-256: efd1b897bbd8e731ec0faf282591c7f216f195a50ee6a1d99da78ca9b11440f5
font_01_sfnt_off00016da4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16DA4 10992 bytes
SHA-256: fe2c0e7d08f8895077013858e4631b79738aec559792871bc5fc9a275f2a49bb
font_02_sfnt_off000186f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x186F9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1