Malicious PDF — malware analysis report

Static analysis result for SHA-256 689eedee682a9c83…

MALICIOUS

PDF

84.3 KB Created: 2021-07-06 03:11:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a0be887d1ffe6a159b7f324b3ce0a508 SHA-1: 9b12767ba1b01460bc120371a021c3e2634476b7 SHA-256: 689eedee682a9c83b945faa08a509bd8f7200ba331ca908780e194bb02cd412b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm or phishing lure. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates a non-clustered link farm on disposable hosting, further supporting this assessment. No scripts were extracted, and the document body was unreadable binary data.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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://cananalimdar.com/wp-content/plugins/super-forms/uploads/php/files/slfsf5n8rg9qafna2p1o57ech8/63119801260.pdf
    • https://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cc01c442fd---borubi.pdf
    • https://www.thecandystoresudbury.com/wp-content/plugins/super-forms/uploads/php/files/aiuvgab1d7o170apco2d1nfqgi/sinufowuwu.pdf
    • http://koryosushi.com/uploads/files/35170525611.pdf
    • https://inchiriereelicopterromania.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160846da7b0441---zogavet.pdf
    • https://law.myvzl.com/wp-content/plugins/super-forms/uploads/php/files/h5tmefbp3qi40iv421eb6e0mr2/dokanadexutetososisip.pdf
    • http://esoftland.com/userfiles/file/73456646867.pdf
    • https://costumeworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608162db3bf14---17532029663.pdf
    • https://signika.pl/Upload/file/90383271063.pdf
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b40597db2b2---wazilarimotudam.pdf
    • http://dostavkaturov.ru/files/file/20597193698.pdf
    • https://eminencesolutions.in/resources/userfiles/file/4233512528.pdf
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609688ad13d98---kuzefumolabugeguze.pdf
    • https://btcauction.vn/hinhanh/file/kalipixanonedilisez.pdf
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ab87c4a0fcb---28468825796.pdf
    • https://houstoncoinshow.org/FCKeditor/file/lepoguv.pdf
    • https://www.brunosistemi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607166ab853e4---87856991138.pdf
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098468b28333---razuwuv.pdf
    • https://akemi.ro/hirek/file/bivezumivire.pdf
    • https://kvartira-zalog.ru/wp-content/plugins/super-forms/uploads/php/files/c64276fd2b677a447c425fe6cd82c3cd/visono.pdf
    • https://www.justgym.co.za/wp-content/plugins/super-forms/uploads/php/files/mlp244kvpl0ef14apu24ufg8h7/22704649820.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=colvic+sailer+26+for+sale
    • 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_off0000e899.bin
c598fdf118b3e45454b4e02f3388765e41f4c9af7bbccb6be97bf56cdc50955c
pdf-font-stream PDF embedded font (sfnt) at offset 0xE899 16632 bytes
font_01_sfnt_off00011422.bin
71d63fa6e002db44f88f293b94d8b79592797db9824e52cbe92be6ebaa9d5039
pdf-font-stream PDF embedded font (sfnt) at offset 0x11422 10512 bytes
font_02_sfnt_off00012c4a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12C4A 16792 bytes