Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b4d0467eea1aa55…

MALICIOUS

PDF

83.2 KB Created: 2021-06-29 21:42:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 793be1ff4177dfaf7664cb2130ee7780 SHA-1: 8e93922c88fbb654bdd6aed7a93343f0aef73a87 SHA-256: 7b4d0467eea1aa552ccc9370b63972238d1a9fcdc324ad2b15dbe998f084bb7a
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites acting as hosting for further malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to lure users to phishing or malware download sites. The presence of multiple distinct hosts and link farm heuristics suggests a deliberate effort to distribute malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/160b1ee61d0aa7---80811415691.pdf In PDF document text
    • http://www.cheapmotorcycleinsurancepa.com/wp-content/plugins/super-forms/uploads/php/files/h8h038u2d5jrjuqk8q3rbb5lg7/soxaketotalikux.pdfIn PDF document text
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9a5da46b2c---bulixuxoxarurok.pdfIn PDF document text
    • https://fourseasons.events/wp-content/plugins/super-forms/uploads/php/files/e90f3ba7931385e2890b26ec60896289/wokaxozajatadipemobizob.pdfIn PDF document text
    • http://opalbiosciences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac0af1532ac---63433736701.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/02b83a53008a05ed5c49401a49fa4c95/zejagi.pdfIn PDF document text
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607210dd1f12e---nazeso.pdfIn PDF document text
    • https://www.medipratik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160802de9ce024---80298384663.pdfIn PDF document text
    • http://dgxzz.com/uploadfile/file/welewudisora.pdfIn PDF document text
    • http://abwjefferson.com/uploads/files/40555445713.pdfIn PDF document text
    • https://hps-gruppe.com/wp-content/plugins/super-forms/uploads/php/files/4j3bvq33mpgthkqunpc5s1f8bo/favofavuwematowavemojiv.pdfIn PDF document text
    • http://morgancountyoh.com/userimages/44269892314.pdfIn PDF document text
    • http://deepakbatteries.com/uploads/file/24831229854.pdfIn PDF document text
    • https://arrayamed.com/userfiles/file/15507672081.pdfIn PDF document text
    • http://orlickachata.cz/files/files/xapuvutezewodaw.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/a79203d7864215964e522bafa118a887/97393647768.pdfIn PDF document text
    • https://hopefor.today/wp-content/plugins/super-forms/uploads/php/files/301e955ce8a04a60e06bb1b9535cedf6/lesure.pdfIn PDF document text
    • http://middlegeorgiacoinclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e6643f0f8a---35696668067.pdfIn PDF document text
    • http://bazatalty.pl/wp-content/plugins/super-forms/uploads/php/files/b68b07d83b6bb289fe958b8ab5f9a5e5/56202151113.pdfIn PDF document text
    • https://damiel.eu/userfiles/file/xoworowutavujipiv.pdfIn PDF document text
    • https://infravoip.com/wp-content/plugins/super-forms/uploads/php/files/7f5e643137d8f32c0780b67c5aebf8bb/51231389273.pdfIn PDF document text
    • http://cgl.lu/userfiles/files/denagesezisituzunag.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=s+words+4+lettersPDF link annotation
    • 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_off0000e36f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE36F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fb86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB86 10124 bytes
SHA-256: f7800ac86ded40059dc95be0647ad22630f7ea44789c7957aa2c3f3d68dd7ed9
font_02_sfnt_off0001125b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1125B 17516 bytes
SHA-256: bd12a944040cc0c964dbc69e9de34a56747654a21d520b72408e628be7bb8e54

Open this report in the interactive analyzer, or submit your own file for analysis.