Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7563d2607cc3cc5…

MALICIOUS

PDF

153.9 KB Created: 2021-06-29 03:12:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 1e5eb47ca283975a9d37ba53533e817c SHA-1: 40f8a42c37b3aa9557e1af74aa0184fd814c6d75 SHA-256: e7563d2607cc3cc5c97014ddfdac12e59d76a5ee738ab345def2f54146c888dc
156 Risk Score

Malware Insights

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

The PDF file contains a link farm pointing to numerous compromised WordPress sites, indicating a phishing or SEO manipulation scheme. The ClamAV detection and ML classifier strongly suggest malicious intent, likely to redirect users to malicious content or exploit kits. No scripts were extracted, but the structure and URL patterns are indicative of a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9742

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.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ca4415ca8c---fewemigoneniked.pdf In PDF document text
    • http://sonkertrail.org/clients/9/92/9260a3c387aed4615f72c72c3a1da295/File/dokasinotikorovu.pdfIn PDF document text
    • http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/1609dfcfcb09af---72642502868.pdfIn PDF document text
    • https://amesmedicalservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160792296d64f9---32529830497.pdfIn PDF document text
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bce8382f5f4---1624746825.pdfIn PDF document text
    • http://csc0532.com/userfiles/file/20210609230423_0t6pdt.pdfIn PDF document text
    • https://www.freshstartdigitalmarketing.com/wp-content/plugins/super-forms/uploads/php/files/d982114d827d314fd0186505f43e9d7f/15995116522.pdfIn PDF document text
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160973f380ca9d---71195503894.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0d4253e535---16065859802.pdfIn PDF document text
    • http://r2doodles.com/clients/4/4a/4a4ed909dcef54c1e3ec6a0ce1d29f2d/File/30019384801.pdfIn PDF document text
    • https://www.varishastalari.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cf0e57e1e1---vufavemivag.pdfIn PDF document text
    • http://beloit1962.com/clients/8/83/8368a4f838dea3176655029ae9e337da/File/rizimeror.pdfIn PDF document text
    • http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1607b19279c024---vejewazatur.pdfIn PDF document text
    • http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16086bdf60c862---ropogafoxi.pdfIn PDF document text
    • http://esipro.fr/userfiles/file/xosubabukupikuvuru.pdfIn PDF document text
    • http://keysrotary.com/clients/d/da/da683cbc30bfd632b0b364d14bdd38fd/File/97687061855.pdfIn PDF document text
    • https://www.schroedersales.com/wp-content/plugins/super-forms/uploads/php/files/7580b10ea62076cda5ee5945d39ef970/kuwudufelimam.pdfIn PDF document text
    • http://roughriders66.com/clients/f/fa/fa96273273f04fd2a06feef12b1e4d70/File/10603668102.pdfIn PDF document text
    • http://thaide.org/userfiles/file/84975289215.pdfIn PDF document text
    • https://unosms.us/userfiles/file/46093423918.pdfIn PDF document text
    • http://boulderdivorcelaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095f8250232b---40259168872.pdfIn PDF document text
    • http://goldartline.ua/userfiles/file/tifejefowisusakegiki.pdfIn PDF document text
    • http://ahxxzx.com/userfiles/202105/file/1985332228.pdfIn PDF document text
    • http://milcontabil.com.br/wp-content/plugins/super-forms/uploads/php/files/2eeop6jvnnsqtia6e8f3vlq6b2/xudevafijetulafoxez.pdfIn PDF document text
    • https://www.yoursurveysurveyors.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160938ec7e567d---pupirazuwexodasujul.pdfIn PDF document text
    • http://solemarservizi.it/userfiles/files/10593693953.pdfIn PDF document text
    • http://tehnicgaz.eu/files/file/buwuxegivuvak.pdfIn PDF document text
    • https://www.kiteschule-kiel.de/wp-content/plugins/formcraft/file-upload/server/content/files/16070262897e3d---deroki.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=wordscapes+cheat+level+1919PDF 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_off0001fbc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1FBC2 10692 bytes
SHA-256: ff305761d0acfba31ea1cad1b2e0860c49c0068de08b69eb6e91320ba8767bc1
font_01_sfnt_off0002148a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2148A 17088 bytes
SHA-256: 73bedba929b1fcda9bccbc39c40f2cbf86bf284c1e55eb64acc9dbc5db51d04a
font_02_sfnt_off0002413f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2413F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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