Malicious PDF — malware analysis report

Static analysis result for SHA-256 19a828118fe62394…

MALICIOUS

PDF

77.0 KB Created: 2021-07-05 10:35:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7daeb01b3a343a3e6adfc73dd3fada89 SHA-1: a5e9e7b30bae18f5e0e8d839ca0449b7f9353859 SHA-256: 19a828118fe62394de0ff4d5fdb1d53f854d19ab64e4d84afbdcf357db950258
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for executing malicious code within documents. It also features a link farm pointing to multiple distinct hosts, many of which appear to be compromised WordPress sites used for hosting malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://moyamoya.center/images/hand_uploaded/files/62016928936.pdf
    • http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609ba0af7dd72---gavisavifeki.pdf
    • http://phillipwhiting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d201386f55---34741415087.pdf
    • http://d4smontreal.com/clients/f/f5/f58105ca183540932673f5bf18e62671/File/fasidabuwofemuw.pdf
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b12e161c16---fuxosadotozan.pdf
    • http://norview63.com/clients/5/59/59ba6e1aa7224642a1eeb14435756cbf/File/kirelawezubekomovip.pdf
    • http://konsultacjenaukowe.eu/Upload/file/lopebazefakus.pdf
    • https://xn----9sbccjdbca7cyaieg1a3j.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/fcbbf11829fdc20cd621aac081ed607a/35638362705.pdf
    • http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160b0678fd43fa---58878511885.pdf
    • http://clair-environnement.eu/catalogue_dynamique/file/pebuvudigizosexafemofo.pdf
    • http://maduraicaterers.com/app/webroot/js/ckfinder/userfiles/files/89129212608.pdf
    • https://bucatariizidite.ro/printuri-fi/files/68559898474.pdf
    • http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084e2b019720---95548179708.pdf
    • https://eyetracking.pl/userfiles/file/jivebelajaxovaker.pdf
    • https://xistenze.com/files/files/manurujirubare.pdf
    • http://gennarimaq.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b19c0598c42---somupebufoxesapilaxodovi.pdf
    • https://ols.lighting/wp-content/plugins/super-forms/uploads/php/files/15798528e5dcf10915662085af50952e/79020140459.pdf
    • https://fonixkoncert.hu/upload/file/vuxomatusod.pdf
    • https://rjiminfra.com/wp-content/plugins/super-forms/uploads/php/files/33bebc7d2dee4e19594598fca5004815/96933938554.pdf
    • https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/7eee8d69f258179c997c00ec64c9e200/lusut.pdf
    • https://smilepath.com.au/wp-content/plugins/super-forms/uploads/php/files/4affc01508fb7fb1a601a7211e574e1b/suravofezujoxiwiro.pdf
    • https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4094dc2f0c---9124932490.pdf
    • https://humble-brag.com/wp-content/plugins/super-forms/uploads/php/files/g83imqdcit406p8g59j9jee3r2/64151996492.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=the+many+hats+of+the+president+worksheet+answers
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf257811647---fonidogemize.pdf
    • 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_off0000cab5.bin
0771d7498e86249719e03c40e76a5d5f8793e92e1f919b816d291b1c7cfac1b0
pdf-font-stream PDF embedded font (sfnt) at offset 0xCAB5 10972 bytes
font_01_sfnt_off0000e419.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE419 16792 bytes
font_02_sfnt_off0000fc2b.bin
597678535601db543f6dea0196b3e0cd2fb66c6300e3acaa60537912c0e11111
pdf-font-stream PDF embedded font (sfnt) at offset 0xFC2B 16376 bytes