Malicious PDF — malware analysis report

Static analysis result for SHA-256 fece57010d19d57e…

MALICIOUS

PDF

84.8 KB Created: 2021-06-28 01:12:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 90cffbda2aa998355b022b33cc154957 SHA-1: 52ffa559859f7a3661d4a54e5c2342c6c225d3e2 SHA-256: fece57010d19d57e58f98986bba28a14a308289528fc4a01a978e079c33c225f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate the document contains a link farm pointing to compromised CMS upload directories, suggesting an attempt to lure users to malicious or phishing sites. No scripts were extracted, but the presence of numerous URLs on compromised hosts implies a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9860

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://itaindustrial.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607d40378ab9e---54426312359.pdf
    • http://baaningdoi.com/file_media/file_image/file/55872005344.pdf
    • https://bbensonmft.com/wp-content/plugins/super-forms/uploads/php/files/9a862e0df0db62c5707aeb523d6660d5/70043162379.pdf
    • http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/160874cf5e8768---13653006831.pdf
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/debtq1r3qtsglugeucu8lfieh6/56360071810.pdf
    • https://mannerfeltdesignteam.se/ckfinder/userfiles/files/ramefafadumaxidazobidorel.pdf
    • https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b83dcaf3159---xatejoxeluz.pdf
    • http://dejede.com/userfiles/file/xulimawijipane.pdf
    • http://cana.vn/uploads/userfiles/file/nudosinube.pdf
    • http://vipavtoufa.ru/wp-content/plugins/super-forms/uploads/php/files/e00e8066a31d052f903519bcc5f3113f/xofoxej.pdf
    • https://otartufo.com/ckfinder/tartufofiles/files/18720614226.pdf
    • https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/ba80f6d6f3112290997d14794ab2be83/14863475742.pdf
    • http://amphorabeautyclub.com/campannas/file/vejido.pdf
    • http://prosquash.by/data/burubelutetegamoronixapad.pdf
    • http://beijinghuojia.cn/userfiles/file/42806616300.pdf
    • http://andlupa.com/userfiles/file/novigadurilimapob.pdf
    • https://southernlightingsource.com/wp-content/plugins/super-forms/uploads/php/files/7444e2b449b01c5f9e2621e9f646f477/bawizuzezewivejure.pdf
    • https://eyestech.in/wp-content/plugins/super-forms/uploads/php/files/utaffccnbm2j8modvh14rknd5e/59627264181.pdf
    • https://law.com.sg/wp-content/plugins/super-forms/uploads/php/files/494e9c53c3e05face6654f7394da54b8/goluk.pdf
    • http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/160814890ae49c---mifil.pdf
    • https://bibliotheque-des-arts.ch/ckfinder/userfiles/files/vusoxasitodajilelubiwawi.pdf
    • http://amtusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079bd3cabee7---37738318365.pdf
    • http://cuacuonanbinh.com/userfiles/file/lulosuzobevujiki.pdf
    • http://webhenevents.com/clients/868374/File/62599615414.pdf
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a370e4c6087---bibes.pdf
    • http://noahsmarinesurveyors.ca/userfiles/file/45339433926.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=way+of+the+kensei
    • 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_off0000ea62.bin
0cba43e26ea763e6ec4f4289b0717dc041e7f20ceaf1966e05a9004cb4438654
pdf-font-stream PDF embedded font (sfnt) at offset 0xEA62 16868 bytes
font_01_sfnt_off00011663.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11663 16792 bytes
font_02_sfnt_off00012e7a.bin
dec14c521e5f1596c2e3e7a526e5522a58a5e6147f9749d55ff023dbd8f94fca
pdf-font-stream PDF embedded font (sfnt) at offset 0x12E7A 10364 bytes