Malicious PDF — malware analysis report

Static analysis result for SHA-256 b193120519254cd7…

MALICIOUS

PDF

97.7 KB Created: 2021-08-13 00:49:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 12103c5a2dd48bfc1aaa37b56e5c2b6d SHA-1: ce4a414a9b70ed536c79e5d01ea02f45ee3ac601 SHA-256: b193120519254cd7a645e41c3bb71ca2ce214c4a727d84bd35c0dfb9e45d1cab
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a link farm pointing to compromised WordPress sites, suggesting it's designed to trick users into downloading further malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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 https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/160781eb3576b2---rolejarosumawelami.pdf
    • https://zazilha.com.mx/wp-content/plugins/super-forms/uploads/php/files/f73c4df31b3f58e167f8a875ff90aed0/fuwodokoki.pdf
    • https://www.bankkartya.hu/js/ckfinder/userfiles/files/18586073107.pdf
    • http://markasib.ru/ckfinder/userfiles/files/xotegusebetugisafaxigaxu.pdf
    • https://soechi.com/userfiles/file/88004605683.pdf
    • http://www.grupohk.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c76bedbef08---mijotogezugipozux.pdf
    • http://xn--49s538bo8ux8c.net/userfiles/file/15468424737.pdf
    • https://www.hagensmarketing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e77b2fcc4d3---12166931862.pdf
    • http://www.ppk-kp3k.kkp.go.id/ver2/extra/ckfinder/core/connector/php/media/ckfinder/files/7935765643.pdf
    • http://infrabud.eu/fckpliki/file/rofiniwutabofi.pdf
    • http://gistfamilyreunion.com/clients/8/8c/8cbf0a40baaab9dd4734ff2cdbb1e120/File/32183776366.pdf
    • https://kolodezrus.ru/wp-content/plugins/super-forms/uploads/php/files/33602813e7876a3fc0c5f1a593b4fcec/segavosofaruxib.pdf
    • http://shadesvalleymounties1969.com/clients/868959/File/mujojekemogaji.pdf
    • https://gmt-tw.com/app/webroot/userfiles/files/fofagiwinemebapuzix.pdf
    • http://euroear.eu/ckfinder/userfiles/files/76366326264.pdf
    • https://aawyx.com/sites/default/imageuser/file/burirufusokotemasabivinez.pdf
    • https://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0bb118dcbf---97486949033.pdf
    • http://www.cheapmotorcycleinsurancepa.com/wp-content/plugins/super-forms/uploads/php/files/2b2tfuvhn2ggaifn6mk4d24i80/53151013802.pdf
    • https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a08e4855655---woxaguwuvokaxupere.pdf
    • https://www.latentoac.com/portal/wp-content/plugins/super-forms/uploads/php/files/pmmvqldpjup1pmv9kdir904sq6/surusosujavunijita.pdf
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c6d1447830a---34393260588.pdf
    • https://www.colegiodesafio.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/1607117d03abe1---vutelitijegur.pdf
    • https://quatden.vn/webroot/img/files/mubagetaxovagurisowivuvib.pdf
    • https://www.drserapkagan.com/wp-content/plugins/super-forms/uploads/php/files/7jge2kribjrd46lj30trh2oirg/22992359184.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=secondary+checkpoint+past+papers+science+free+download
    • 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_off00011713.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11713 16792 bytes
font_01_sfnt_off00012f2a.bin
9f9351c83186248b09d6aa29243b94b3364a720e1a2ae3a8f1aa9a289535fe37
pdf-font-stream PDF embedded font (sfnt) at offset 0x12F2A 11084 bytes
font_02_sfnt_off00014904.bin
0ae6a5e6bdc78dd2e2861c0ecb4191b922f36def40cfffe2102d65ceeeea2e00
pdf-font-stream PDF embedded font (sfnt) at offset 0x14904 17812 bytes