Malicious PDF — malware analysis report

Static analysis result for SHA-256 14ae9d780667ba7b…

MALICIOUS

PDF

84.7 KB Created: 2021-06-30 02:12:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 14b90d8a600527e94c80fde3edd69d81 SHA-1: 33a7436757ce0aa41e7313f9a6200477f794cd32 SHA-256: 14ae9d780667ba7bc8edcc295002f9d2cc1668f2d40092628746dd687639597f
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 distinct hosts, many of which are identified as compromised CMS uploads or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution via these links. No scripts were extracted, and the document body was unreadable binary data.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9780

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://rosycaffe.com/file/vunutijopewapuvazuse.pdf
    • http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608635b6efd51---kixigebapujopavigoxa.pdf
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607015cf6f6d3---94019225856.pdf
    • https://cutletsmeat.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081e17580348---52068017587.pdf
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b7e5a57cab7---43346238570.pdf
    • http://xn--80aaeiengkwpz6p.xn--p1ai/pub/file/zemuvifabewatupe.pdf
    • http://younewstoday.com/task/userimages/file/16771007888.pdf
    • http://victoryelectricalsupply.com/ckfinder/userfiles/files/6966633312.pdf
    • https://kermoulin.com/userfiles/file/25188756002.pdf
    • http://fincasotilloviejo.es/files/sotillo/_repo/file/xijofexazepuwube.pdf
    • http://peneleos.pl/userfiles/file/87702728999.pdf
    • http://traiteur-ribot.fr/userfiles/file/desokuvisewatojemawad.pdf
    • https://blackknowledge.com/wp-content/plugins/super-forms/uploads/php/files/df69b1fc4ba52916dcd7803dcac8b083/11904791254.pdf
    • https://whitelightdesign.com/wp-content/plugins/super-forms/uploads/php/files/3767e7df4b12b9733e53443579060aee/defoxaluritefabokuzewonoz.pdf
    • http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/16095e6f773040---91058154711.pdf
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d850bbc1364---zifeposuxavesutenu.pdf
    • https://spectrumohio.com/wp-content/plugins/super-forms/uploads/php/files/343a1e57a8e96e2885b6d9bc22eeacc2/53899254948.pdf
    • http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070af2f2f099---88125636537.pdf
    • https://www.ideaklinikkadikoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d0a864acc2---70050418407.pdf
    • https://soechi.net/userfiles/file/47960015815.pdf
    • http://clinicacomciencia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607bf48c4469f---zilipewosixexipipudavelib.pdf
    • http://vdgairconditioning.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608fecdf29104---bikugonedoroda.pdf
    • https://www.vbclighting.com/wp-content/plugins/super-forms/uploads/php/files/241df62bd1a707440886f36e0e98105f/91132563605.pdf
    • https://lastcallslc.com/wp-content/plugins/super-forms/uploads/php/files/a8626d025bdd4a8c55d827be58b4557e/mowidejajoxuwet.pdf
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/e8pklu5kamuhafp3lo46de4huj/fibanotejekom.pdf
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a0d95a90516---43957489934.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=ln+x+dx+integration+by+parts
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d81a.bin
ef36d0e99d83c984185e4b4a72f0706a756b953867c30286bbf0838448704ee9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD81A 18616 bytes
font_01_sfnt_off000109fc.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x109FC 16792 bytes
font_02_sfnt_off00012213.bin
40f5b90f76e97cb80f216785eb950ff4c13eb9a44aec0b9ea831d83a894ef181		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12213 10832 bytes
font_03_sfnt_off00013ac1.bin
5ea315674af27cd99ffd67a2c871d7cb0df38ff8a7419707fe117d341208358d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13AC1 1824 bytes

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