Malicious PDF — malware analysis report

Static analysis result for SHA-256 468250ed82bff674…

MALICIOUS

PDF

99.1 KB Created: 2021-05-08 16:38:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: c1bdda47e1923455955fdca54776496b SHA-1: a0abf90bc406949187f072c69faf25279a8fc6aa SHA-256: 468250ed82bff6747ab87e1fe24a948826cf8a4e78bcfa01763a85a26d26bf59
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://www.dekleinewerf.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160903b066608f---61575648358.pdf In PDF document text
    • http://themultifold.com/wp-content/plugins/super-forms/uploads/php/files/ht7cdvfdur4nu8sgnoinnqrgk1/69805593956.pdfIn PDF document text
    • https://enville.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084f72e1afbd---89310252807.pdfIn PDF document text
    • http://ampletrekking.com/userfiles/file/15381533565.pdfIn PDF document text
    • http://www.stallionreadymix.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160865df77a82a---rakibufivifixetisizujidi.pdfIn PDF document text
    • http://mirembeestate.co.ug/wp-content/plugins/formcraft/file-upload/server/content/files/160726bd3eb4fd---sabimoxoriwa.pdfIn PDF document text
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/4e196695784c9a77f8cc93b0efea96a8/88480732281.pdfIn PDF document text
    • http://aaaexpressac.com/userfiles/file/damumone.pdfIn PDF document text
    • http://www.publicitymailing.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160828fd94efc4---61271239792.pdfIn PDF document text
    • http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/16078c9f72eae7---zobage.pdfIn PDF document text
    • https://prana.video/wp-content/plugins/super-forms/uploads/php/files/j4mik54j3i520l9ct6bu0qnsg7/63776714013.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f3fbe7ace0---86347844380.pdfIn PDF document text
    • http://stylist.in.ua/wp-content/plugins/formcraft/file-upload/server/content/files/16082b52e28d10---38686661997.pdfIn PDF document text
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070b682a2557---31068499190.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/f316cf7ee18aded46597a7d437d92eb4/fiwemebu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=maharashtra+state+board+11th+information+technologyPDF 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://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ff70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF70 5176 bytes
SHA-256: 2cdf08c71e59d7e5818c0070280d51e34789348dd352f1d5848775bae96102c2
font_01_sfnt_off00011186.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11186 5520 bytes
SHA-256: f7f63ff9d439d21ffa22e3d1062c8111de65411dc3116550ac4815bd38fd99ef
font_02_sfnt_off0001242a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1242A 11312 bytes
SHA-256: 81b9716fb57c17cc211aded8fd01f2a8d66c3e6db214b1eee4812ae38c2ab57d
font_03_sfnt_off00014acf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14ACF 16308 bytes
SHA-256: e0872be6434aeffafc796a6fd5b1a41688c2714f659535881358d3f57d0102f1
font_04_sfnt_off000160a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x160A4 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e
font_05_sfnt_off00016ea4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16EA4 4172 bytes
SHA-256: 0167321f0f6e594bcf2769b465054293bff26ca0f12cd198d6711c55a0c306d1

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