Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7af6a911d4c8c75…

MALICIOUS

PDF

89.1 KB Created: 2021-06-29 04:21:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9a5485bdec77cc5dc9c0508c2a6f7d07 SHA-1: 19e92705fd10ab0bb850e4a36d0636f372168371 SHA-256: d7af6a911d4c8c7590253a695c85d50ad18abeba9b014a2b0266e5234b8037cf
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is often used to exploit vulnerabilities or redirect users to malicious sites. The presence of multiple links pointing to compromised WordPress upload directories suggests a phishing or malware distribution campaign. The ClamAV detection and ML classifier further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://allseasonsart.com/uploads/fck_uploads/file/44448418782.pdf
    • https://awlights.com/wp-content/plugins/super-forms/uploads/php/files/517af25b9e5168cb5d072e48dcbf1d39/84279110550.pdf
    • https://www.lindopoint.it/wp-content/plugins/super-forms/uploads/php/files/da13d0f20a32e9dd89dbca00e55f1105/12409046098.pdf
    • http://subventionsbetrug.de/wp-content/plugins/super-forms/uploads/php/files/aem4dlpht0rq86bsh1ooovt16a/56703816087.pdf
    • https://www.eoluk.com/wp-content/plugins/super-forms/uploads/php/files/mssstp1pe4lff97tell57ogl2a/82222423773.pdf
    • https://www.horisunmauritius.com/wp-content/plugins/super-forms/uploads/php/files/8bc31e8a1ed2835bdc8297581515f2c1/14812603359.pdf
    • http://bahtiyardishekimi.com/fckfiles/file/48956906986.pdf
    • https://www.colours-of.com/wp-content/plugins/super-forms/uploads/php/files/d7ntj8ikm1a0t0m2eq08e1dtsm/63463858179.pdf
    • https://www.pharmaright.ca/wp-content/plugins/super-forms/uploads/php/files/g3cl8ig868h1j269imi0r8rojg/24829428847.pdf
    • http://nhadatv.com/webroot/img/files/29773005229.pdf
    • https://www.tessilgiada.it/wp-content/plugins/formcraft/file-upload/server/content/files/160aaf59e8700d---94457534738.pdf
    • https://hostingalani.com/calisma2/files/uploads/renunujivepiwojazo.pdf
    • https://bestrecycledautoparts.net/images_i/file/72792170306.pdf
    • https://flylights.pl/wp-content/plugins/super-forms/uploads/php/files/5v1ce02grlu0a14tmbm4658ajr/48990387411.pdf
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d52ebe18ad---bababuwelok.pdf
    • https://bokseinstituttet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1606ce7395eac9---ximewe.pdf
    • https://claphamjunction.com.au/wp-content/plugins/super-forms/uploads/php/files/1b7c55f6e7bac93f3e1857bc2fdd6976/73495759108.pdf
    • https://tcufroghouses.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fe2b0a7b8c---82063693544.pdf
    • https://eternalbliss.net/file/28091966067.pdf
    • http://garagehayashi.com/js/upload/files/sinatagasojedufirepipati.pdf
    • http://ahlhy.com/uploads/file/032220129578.pdf
    • http://krindustria.com.br/site/wp-content/plugins/formcraft/file-upload/server/content/files/16084310e52065---riwun.pdf
    • https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079aefab7d7a---sufadizezupujenilapeto.pdf
    • https://zlatartopalovic.rs//files/46634007211.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=spies+in+disguise+watch+online+123movies
    • 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_off0000f231.bin
ef5124c3e0020a0b0bd0c72cba4372fcbd96f0d6212c751b6ce7d1c1c5c5d387
pdf-font-stream PDF embedded font (sfnt) at offset 0xF231 18192 bytes
font_01_sfnt_off000121e2.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x121E2 16792 bytes
font_02_sfnt_off000139f9.bin
6f3996c2cb3a544df79ab8700f742a17a3b8eb60b0dc9f657f8080639a0a7ec1
pdf-font-stream PDF embedded font (sfnt) at offset 0x139F9 11532 bytes