Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d2249bd2fdf2a92…

MALICIOUS

PDF

92.6 KB Created: 2021-07-03 19:38:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7064e4d4234fa5a6e4b0d2f38bc19da7 SHA-1: e5f1caf62999a0ed9ce525d7e5804ec971b0d6eb SHA-256: 5d2249bd2fdf2a92fda24972fe7408af08b8dd9691a29ff8dc74de8e6fcfec1f
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple compromised websites, likely intended to trick users into downloading malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the presence of embedded URLs and the nature of the link farm suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9923

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://oniceh.ru/uplcv?utm_term=monday+march+23rd+bj+the+queen+lyrics
    • https://ozmutludokum.com/userfiles/file/xadafipaxepepowi.pdf
    • https://vizzzio.ru/wp-content/plugins/super-forms/uploads/php/files/3c2228f53ee00c0b6e82234f8164d4b1/78095464290.pdf
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160aa9135e768c---komuzepabiwu.pdf
    • http://tizianaiberti.it/userfiles/files/retogobaguvowo.pdf
    • https://haps.company/wp-content/plugins/super-forms/uploads/php/files/vgt4hf3msnfj8vh3m8q48ce5s1/dabutaziwemogikuzevidava.pdf
    • http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/16076910b81045---gimipolefipewufenazev.pdf
    • http://aodaibooking.com/FileData/ckfinder/files/20210624_86694060C2510982.pdf
    • https://www.cukoyem.com.tr/wp-content/plugins/super-forms/uploads/php/files/hqd0ubckl0fofvbvbgqvke0vk3/69347453343.pdf
    • https://kfz-gutachter-oliver-schiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/160721ac2e6c6f---34565993996.pdf
    • https://greshamgilessalon.com/wp-content/plugins/super-forms/uploads/php/files/6d892fe9d554226a4a0ce859adce98f3/7373680712.pdf
    • https://topinsolventa.ro/userfiles/file/verepawoxakujapiwedatin.pdf
    • http://martom24.pl/martom/userfiles/file/xitixulek.pdf
    • https://iwistw.com/upload/files/zeworamutuk.pdf
    • http://progfin.pl/userfiles/file/besavet.pdf
    • https://www.helpforbusymums.com/wp-content/plugins/super-forms/uploads/php/files/bad435ff30b71a74ac5b95626956c8b5/41338163017.pdf
    • http://chizclean.ru/files/fck/file/murivetejo.pdf
    • http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16086ef07e3e2d---11755525742.pdf
    • http://phenix-security.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160751acd9f7ea---59731404014.pdf
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608cee7f2d911---15657564259.pdf
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2239f126b5---5591599849.pdf
    • http://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a78201d7c6d---mitagofejizisinelej.pdf
    • http://iphonedown.com/ckfinder/userfiles/files/mugenomutoripufariw.pdf
    • https://brianhigbielaw.com/UserFiles/file/girudizutirerijo.pdf
    • https://makemycake.gr/wp-content/plugins/super-forms/uploads/php/files/rburm554nml3m9p7uktc5bcjjk/luwibovu.pdf
    • http://zonwering-belgie.com/ckfinder/userfiles/files/44868109359.pdf
    • 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_off000105fe.bin
afd7ba43289213850489f50789830cc07fdce3d82b5477af513befbe67636511
pdf-font-stream PDF embedded font (sfnt) at offset 0x105FE 11548 bytes
font_01_sfnt_off00012113.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12113 16792 bytes
font_02_sfnt_off00013925.bin
9e2d37577a4a1913c559d44b2ebc5971bd071e45140b62b089f6031de0466501
pdf-font-stream PDF embedded font (sfnt) at offset 0x13925 16728 bytes