Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e75834a0eb51f39…

MALICIOUS

PDF

76.3 KB Created: 2021-07-18 04:21:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a62b518f75b9ed4a11471b8b6f5f1e01 SHA-1: 9c672c4e64d1c9d43b9c81885e395bdd0254e973 SHA-256: 6e75834a0eb51f391de30ae98846a5406d60531ace4ccf71f26463112001eccc
156 Risk Score

Malware Insights

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

The PDF contains a large number of links, many pointing to compromised WordPress sites and disposable domains, indicating a link farm designed to distribute malicious content or phish users. ClamAV detected this file as Pdf.Phishing.Trojan, and ML classification strongly supports its malicious nature. The primary function appears to be redirecting users to potentially harmful external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9943

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://kpotplace.com/uploads/files/makewatalexisigeruji.pdf
    • https://www.wikiwebagency.it/wp-content/plugins/super-forms/uploads/php/files/3f203b95bf61fddf46c87df991af956c/wovem.pdf
    • https://bringem.de/wp-content/plugins/super-forms/uploads/php/files/ffdee44644f642f7bc029b378abc5ced/pajezikexumajiki.pdf
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608ccf58d90a9---duvasixiwudifukopifug.pdf
    • http://www.hangmandigital.com/files/file/36950801284.pdf
    • http://pokewaveanaheim.com/uploads/files/89281132931.pdf
    • https://zazilha.com.mx/wp-content/plugins/super-forms/uploads/php/files/6418dc13fb252fc4ca1ad2285673646f/77941026262.pdf
    • https://noticky.net/akce/fotky/file/nelerogumafos.pdf
    • https://www.bistro-e.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f0d5d7794d---25032523521.pdf
    • http://mesterek.net/tmp/97531032229.pdf
    • http://aktifimmo.lu/userfiles/files/denakulujinububi.pdf
    • http://juniorsmagazine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607289cd94491---jukitatusidudajujovumuzi.pdf
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160746b0c96bfc---76305536724.pdf
    • https://atolab.it/wp-content/plugins/super-forms/uploads/php/files/99aaf2e917379dfafc69916b1d1e7960/jolanajubitivafufezozizu.pdf
    • https://www.emmabowman.com/wp-content/plugins/super-forms/uploads/php/files/043006aac59f73f988bde084335b69e4/gitazutawelejowi.pdf
    • https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609aa046100bf---xadapiraminixewu.pdf
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/16072ba84b9c30---zukuv.pdf
    • http://asdgolfclubtoscana.com/writable/public/userfiles/file/darimeripamuxurodebagej.pdf
    • http://becro-plast.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160e7cbf88189b---86994319092.pdf
    • https://www.indee-r.fr/wp-content/plugins/super-forms/uploads/php/files/3e3ef526eac8ebf8f6418f382e1f359a/77370945823.pdf
    • https://victory-agency.com/wp-content/plugins/formcraft/file-upload/server/content/files/160729e93db0e9---44263744086.pdf
    • https://www.hospedeagora.com.br/wp-content/plugins/super-forms/uploads/php/files/25n2b6kg2gtamij5qui25995jo/xuriboleregusagoxob.pdf
    • http://makaeximworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608fa33abbbfe---89448721925.pdf
    • http://stuarteisbrucklaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/84953821457.pdf
    • http://casaledellasignora.it/userfiles/files/sisefijovisoxotoraxatedi.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=1950+hairstyles+for+long+hair
    • 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_off0000c92d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC92D 16792 bytes
font_01_sfnt_off0000e144.bin
e28ff075b45a4398fbb487eb53eaddc91d1677a9271f4df807d39b2438488a03		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE144 10984 bytes
font_02_sfnt_off0000fad0.bin
90506796b96744fab42e80078a221ab2595212a851f44246990a0e6b15a2e030		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFAD0 15976 bytes

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