Malicious PDF — malware analysis report

Static analysis result for SHA-256 45dbe51c029aa982…

MALICIOUS

PDF

76.0 KB Created: 2021-06-28 19:51:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: af08757e471ebe2adb72d315b5acde4b SHA-1: d08705ae6d36156db0bb35f56cbd2645eb71d63f SHA-256: 45dbe51c029aa9825bfb29346248246c46c094cc662a0b333ac253e05737da5f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1055.012 Process Injection

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The file contains a link farm pointing to numerous compromised WordPress sites, suggesting an attempt to redirect users to malicious or phishing content. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://ptk-astana.kz/wp-content/plugins/super-forms/uploads/php/files/454d127f90beb6e9dd34c46b804ad42d/rawoparu.pdf
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/1608ea56703ebe---simumewomifiwodapasiwuwiv.pdf
    • https://krimgranit.ru/wp-content/plugins/super-forms/uploads/php/files/068f0a67e79dc2fb4669dd2bb160d5a5/61677279052.pdf
    • https://comesa.com.pe/wp-content/plugins/super-forms/uploads/php/files/bndu5hrh92taf7pu9uimpla473/68599526570.pdf
    • http://maxkbm.com/clients/2/28/28fcaa936e2ecbeb6c9a97ea0f1ab253/File/87023152323.pdf
    • https://ferado.vn/userfiles/file/65856493895.pdf
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/e18e8deb8e0fdbe440fbbf1a43e38ec6/91663297069.pdf
    • https://dermo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085b8a53c411---2947994105.pdf
    • https://jamiatulbanat.in/wp-content/plugins/formcraft/file-upload/server/content/files/16075b9c95bfde---14821196448.pdf
    • http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/160bdee45867f3---94607699547.pdf
    • https://eyetracking.pl/userfiles/file/55448477222.pdf
    • http://bazatalty.pl/wp-content/plugins/super-forms/uploads/php/files/b01cf2f6a6ebfbec97db531dbc286209/zoputefelifudepadarujiba.pdf
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607399bacf23f---riloloweje.pdf
    • http://mattstergamer.com/wp-content/plugins/super-forms/uploads/php/files/n4cn3r0h2man4feh7t9snqmk36/89549206317.pdf
    • http://arslanemlak.come/file/2528000911.pdf
    • http://svenstavik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bd90ae3275---90464044917.pdf
    • http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/160bcdc0e5ec38---94536652860.pdf
    • http://www.esthemed.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160c6b17ded2e4---31003710862.pdf
    • http://av-jet.ru/userfiles/file/48549332246.pdf
    • http://msinziniering.com/userfiles/file/75023892464.pdf
    • http://studiomarazzi.eu/userfiles/files/82481956847.pdf
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/a7697da4898b8b0b54f5e3ac582a8519/16455827488.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=top+clause+in+sql
    • 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_off0000c646.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xC646 16792 bytes
font_01_sfnt_off0000de5d.bin
7d8e6a7e4f92f0e271e2f133af266e9a9efb6eb3d7bfc0a79007979c567c4dbb
pdf-font-stream PDF embedded font (sfnt) at offset 0xDE5D 10380 bytes
font_02_sfnt_off0000f5ea.bin
70732cfcdd2954566199cc67e4c398fc632869f23055ad9f23b32d98dbce4a8b
pdf-font-stream PDF embedded font (sfnt) at offset 0xF5EA 17160 bytes