Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b59d7cfd12a6cd0…

MALICIOUS

PDF

84.8 KB Created: 2021-06-26 03:38:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7629bb7a474dc76c0df3c9e19e12ea4e SHA-1: 42cfca28313c7c36485108e8efd99293ddd11224 SHA-256: 6b59d7cfd12a6cd07cc18739674c23de7b8f18166ecc960e7b3a08aa3d2485d2
156 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious. It functions as a link farm, containing numerous URLs that point to compromised websites and disposable domains. These links are likely intended to lure users into downloading further malware or engaging in phishing activities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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 http://sanphamhanquocymy.com/uploads/files/48266364687.pdf
    • http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/160731a45beff1---jidawele.pdf
    • http://hodori247.com/uploads/files/minododivigawagewupak.pdf
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088f44cdc268---vomamawuxotag.pdf
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c87391ba845---39038708069.pdf
    • https://www.lesson-online.org/wp-content/plugins/super-forms/uploads/php/files/h6p1e519ihomnt9dn4nio98bg3/58606953874.pdf
    • http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090e18410c0d---41463068348.pdf
    • https://www.siemers-deutschmann.de/wp-content/plugins/super-forms/uploads/php/files/b3fanjkqsba5p3tjpl5hg7ngq0/remeniwanazaronozoluju.pdf
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/7bc43d960489ebcb621ac735e32ca4e7/89932493042.pdf
    • https://www.shopveriamici.com/wp-content/plugins/super-forms/uploads/php/files/3c83nhdc8oe12oivk0bd3pkiq6/fidufubofotosuxu.pdf
    • https://angkorphotographyguide.com/userfiles/file/fapozul.pdf
    • https://www.amiunaorchestra.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608b691892dd3---84346959339.pdf
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/1606ccab35c1ba---gorotaterikepovutafonov.pdf
    • http://kystop.com/wp-content/plugins/super-forms/uploads/php/files/j5hi9a73m4m09fth8ujkj2e152/puvojijisujupumes.pdf
    • http://timelessmebel.ru/wp-content/plugins/super-forms/uploads/php/files/4b22d5f9f730ca4f999a98511d86f83e/jumotazezodor.pdf
    • https://maychieuvinh.vn/upload/files/61512146681.pdf
    • https://louvre.lv/res/wysiwyg/file/91150812738.pdf
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ccd88967117---7799484512.pdf
    • https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608316e284336---mewapeniwadizu.pdf
    • https://www.lavishlook.se/wp-content/plugins/super-forms/uploads/php/files/7a6d173dccb2305f7bf3d1c6a73bb0c7/28862426648.pdf
    • http://christschoolblr.in/userfiles/file/37958324423.pdf
    • https://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160720b37387c5---tadexekijupidalab.pdf
    • http://www.alfapilates.pl/upload/file/36537976587.pdf
    • https://otelnamore.com/wp-content/plugins/super-forms/uploads/php/files/6109ed6dd4a184aafb35b864020d76bb/nuweta.pdf
    • https://fullhousetourism.com/UploadFiles/file/20210611130517124.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=top+10+bots+for+discord
    • 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_off0000e874.bin
8df55d58afc26fe54c5bbd46136396bfa2b5b9e5054cc6534319870835057b98
pdf-font-stream PDF embedded font (sfnt) at offset 0xE874 16924 bytes
font_01_sfnt_off000114ce.bin
cdf2370c605bb0cdbbbef63ae86766fb132a4d7b2203dc9f2a74f0b90c90c3e7
pdf-font-stream PDF embedded font (sfnt) at offset 0x114CE 10444 bytes
font_02_sfnt_off00012c6a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12C6A 16792 bytes