Malicious PDF — malware analysis report

Static analysis result for SHA-256 09b259189f8a5056…

MALICIOUS

PDF

83.6 KB Created: 2021-07-03 20:08:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ea6d13d73265e960d1615336dadde8d1 SHA-1: d4c4d7d2de2f9a47bedb4a67bec6f9ac0f064f7f SHA-256: 09b259189f8a50560375d9c5b53d18a05dab3b87e5a0a1d6bf8f5ebfe8fd8c98
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The file functions as a link farm, containing numerous URLs pointing to compromised CMS upload storage and disposable hosting, suggesting it is used to distribute phishing content or malware. The presence of multiple external URIs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic strongly support this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 6

  • 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.
  • 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://proxus.nl/file/tilatinedalovixuboli.pdf
    • https://boldvision.tv/wp-content/plugins/formcraft/file-upload/server/content/files/1607be316b8718---gopekurarejebixinujatofav.pdf
    • https://getlovebooks.com/wp-content/plugins/super-forms/uploads/php/files/533cb23d875e022d28e0419b93ef8ede/33638505581.pdf
    • http://savitapiti.org/ckfinder/userfiles/files/9397745394.pdf
    • https://gservicepz.com/wp-content/plugins/super-forms/uploads/php/files/191968f7052c3f67925adbadc995c75a/65692915378.pdf
    • http://bioterapiazabiegi.pl/obrazy/file/3464588554.pdf
    • http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/1608434fa8268d---laxiluwaxuvalabelabo.pdf
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c4cb0ad72d1---12229517549.pdf
    • https://congchung7.com/upload/file/4220385776.pdf
    • http://ar-intl.net/wp-content/plugins/super-forms/uploads/php/files/d7sfh8llhioa25i2m9cqofefa6/27118731973.pdf
    • http://abwvictory.com/uploads/files/76067041550.pdf
    • https://karapinarinsaat.net/userfiles/upload/file/85149984221.pdf
    • http://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085bf9184db9---29551547409.pdf
    • http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a4ed978a92a---32144218447.pdf
    • https://www.urban-quartz.co.uk/wp-content/plugins/super-forms/uploads/php/files/2ff3e1780bbd2ca7efd41c057d33c090/31427428990.pdf
    • http://ljhalls.com/wp-content/plugins/super-forms/uploads/php/files/3555bf26cd9e3b54386277fd1836e309/97244625367.pdf
    • https://118highschool.am/wp-content/plugins/super-forms/uploads/php/files/71fc86d51ea82863e2a49051b366045e/jobilemet.pdf
    • http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/1607c11bca852a---55471982835.pdf
    • http://www.ez4parcel.net/upfile/files/2021/06/22/denafal.pdf
    • http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160847377b38a7---nedovavirimimeron.pdf
    • http://biomassasia.net/data_ed/userfiles/file/9882289567.pdf
    • https://callhfelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac8298c7270---dawavebuladib.pdf
    • http://hesexpo.com/img/editor/image/file/70375188697.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=z+test+for+single+mean
    • 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_off0000e2cc.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE2CC 16792 bytes
font_01_sfnt_off0000fade.bin
10f672fe1b72f659e0b090703b1da1f7fb2914d994b405c1a903fbe9cd6f21b6
pdf-font-stream PDF embedded font (sfnt) at offset 0xFADE 17712 bytes
font_02_sfnt_off0001299e.bin
ca3f1b29ea526bdd8281daaa63d7f6640b4c622a8ccff1da9b745fcf70a9498f
pdf-font-stream PDF embedded font (sfnt) at offset 0x1299E 10520 bytes