Malicious PDF — malware analysis report

Static analysis result for SHA-256 d59e69ee7e7bbff9…

MALICIOUS

PDF

88.8 KB Created: 2021-07-04 03:33:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c2376ea3b0bd6f1b390bc45052ab460b SHA-1: f28bf50e76e20ac20050fecda9d276a6b510d876 SHA-256: d59e69ee7e7bbff9f4a8eef95cee1f70fa3647c6919bf0b50b4f03dd86d7fb0d
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier indicating a high probability of maliciousness. The file functions as a link farm, with numerous embedded URLs pointing to compromised WordPress sites and other disposable hosting. These links likely serve to distribute further malware or conduct phishing attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://kimhoatra.com/upload/fckimagesfile/rufizek.pdf
    • http://dansecyr.ca/pdf/file/bavomejeju.pdf
    • https://ccveg.org/wp-content/plugins/super-forms/uploads/php/files/9q3adlqh70e1u52fcj05jeppah/wizemujak.pdf
    • http://stylekd.ru/files/77339992284.pdf
    • http://mpu-beratung-brendle.de/userfiles/file/bedogamutovif.pdf
    • http://mirrorgallery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160821af16beb2---merilazujofesil.pdf
    • http://victorylimo1.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a3239b60fe---5049173421.pdf
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/b364cd9de69694be497f6213bb2c51a7/10930331457.pdf
    • http://selfmadefilms.nl/userfiles/files/mavuravimaradofi.pdf
    • http://droprint.my/home/ququ4923/public_html/userfiles/file/kazomegoxoturugupewofipo.pdf
    • https://law.myvzl.com/wp-content/plugins/super-forms/uploads/php/files/jgih2du19745ilt81644orhnop/51435496177.pdf
    • http://grupogmec.com/wp-content/plugins/formcraft/file-upload/server/content/files/160703067aac46---12205749202.pdf
    • https://htfcompact.com/wp-content/plugins/super-forms/uploads/php/files/72cf5ca0a5ea83ad7faa2b9b6d95ce2c/32060052784.pdf
    • http://rogo-rotterdam.nl/files/47901783711.pdf
    • https://socialacademy.gr/wp-content/plugins/super-forms/uploads/php/files/16c40490206ba4393fce006032dbe4d7/fewovejujejorararupi.pdf
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c096dedcf18---47311476523.pdf
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/3phn5lqldb0gtebeildm9qpuif/37952183463.pdf
    • https://ipcare.nl/wp-content/plugins/super-forms/uploads/php/files/1c134d8fvs86lcbecjg68l4lha/30043475774.pdf
    • http://kalmi.ru/upfiles/files/lememo.pdf
    • http://www.combatsim.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160c1f6435e939---28022478336.pdf
    • http://iseveranscopy.com/upload/editor/file/45069479931.pdf
    • http://www.blueoak.fr/image/file/nekisosewi.pdf
    • https://bloomeng.com/uploads/wenogezipuju.pdf
    • http://gianphoiduyloimodel.com/Images_upload/files/larimupare.pdf
    • http://nessium.net/userfiles/file/10897881448.pdf
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/4ffb037dbfc57898e3d21f3fa0f8dee3/wasoro.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=how+to+hack+in+fallout+3
    • 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_off0000f85a.bin
4fd947d0c44ab0782f6947f5d09cc148fefed325f769dfc26d74cdcf28a35901
pdf-font-stream PDF embedded font (sfnt) at offset 0xF85A 10476 bytes
font_01_sfnt_off00011024.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11024 16792 bytes
font_02_sfnt_off00012836.bin
970bd9cc30272c64ffd0ddd408300ab218c12f5cd3c1bb08c78b0ced85f1c7c5
pdf-font-stream PDF embedded font (sfnt) at offset 0x12836 17496 bytes