Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7090f1edf955088…

MALICIOUS

PDF

76.1 KB Created: 2021-08-28 04:59:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: bd48bdfd21ac9b56ba041dde4b0f2db4 SHA-1: b7c6eb63a4a6a2d5cbd13a7b6233bda7637bc5d1 SHA-256: d7090f1edf9550881c88232c163e1e633e3925b6a05508050a2afb12d6e5ef51
156 Risk Score

Malware Insights

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

The PDF contains numerous external URIs and links pointing to compromised WordPress sites and disposable domains, indicating a link farm designed to lead users to malicious content. The ML classifier and ClamAV detection strongly suggest this PDF is malicious, likely serving as a lure for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

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://garglob.ru/uplcv?utm_term=how+much+is+postage+for+a+9x12+envelope PDF link annotation
    • https://adikkeempat.com/contents//files/88063566593.pdfIn PDF document text
    • http://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160710505a9309---69424737017.pdfIn PDF document text
    • http://pebyte.com/wp-content/plugins/super-forms/uploads/php/files/2gdeiskq4du5k2knkv4cgl95rn/17869869059.pdfIn PDF document text
    • https://www.beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/30160e1acb5a40a050e0cbaa2ce95a6f/44199103683.pdfIn PDF document text
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/2tcgk5l04p84un5u9ii7mtmtm1/waxojizetap.pdfIn PDF document text
    • https://www.nosolodespedidas.es/wp-content/plugins/formcraft/file-upload/server/content/files/1607da2e28f7ff---razix.pdfIn PDF document text
    • https://fceresources.com/ckfinder/userfiles/files/tuzufijelagobabij.pdfIn PDF document text
    • http://shuimotongyuan.com/userfiles/file/dotekusupegokejidaxubit.pdfIn PDF document text
    • http://capmar.eu/userfiles/file/21196745640.pdfIn PDF document text
    • https://adverto.ee/userfiles/file/sosilewile.pdfIn PDF document text
    • https://mayphotocopydogia.com/upload/files/rataduvekobudewu.pdfIn PDF document text
    • https://uslugiinzynierskie.eu/eurostyl/photos/file/96966571998.pdfIn PDF document text
    • https://studiorampinelli.com/file/89204762280.pdfIn PDF document text
    • https://lightsourceindiana.com/wp-content/plugins/super-forms/uploads/php/files/d2946a93a6c6c118195b23a9d183a55b/42702053318.pdfIn PDF document text
    • https://lapalettedesarts.fr/gestion/file/50484777885.pdfIn PDF document text
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160795d2f2d5a4---goturekarobuviz.pdfIn PDF document text
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abba374e3d8---16460068904.pdfIn PDF document text
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607eec5329b93---nekaxe.pdfIn PDF document text
    • http://www.danvillern.com/wp-content/plugins/super-forms/uploads/php/files/fe2c71befbbc39444945e9cf3b5e79b8/21997211739.pdfIn PDF document text
    • https://camile.vn/wp-content/plugins/super-forms/uploads/php/files/li1348juu9h428d9l2gno6qka5/85206639635.pdfIn PDF document text
    • http://www.maarsehoveniers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16086a2bb94dab---xakokewitivusovegogiviti.pdfIn PDF document text
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca4b49815e---kamokazilokedeguf.pdfIn PDF document text
    • http://garmagostaran.com/Upload/file/46873475920.pdfIn PDF document text
    • http://choinka4x4.org/cms/files/file/69595711876.pdfIn PDF document text
    • http://www.ellisrasbetonwerke.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16077064f71421---32497765750.pdfIn PDF document text
    • https://paron-rebondir.com/uploads/files/xerikuzupi.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c5de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5DE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ddf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDF0 15824 bytes
SHA-256: 36591e17769fdd6acfc69a4f469cc3ece63fadc8f14d135c5830d4f452fc3fdd
font_02_sfnt_off00010686.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10686 11612 bytes
SHA-256: a8aadcb74fed189d8bc7a4ae6318361a42619cbdc7d44dd9442d61150ff40a1b