Malicious PDF — malware analysis report

Static analysis result for SHA-256 69c6570cfd15bff2…

MALICIOUS

PDF

108.4 KB Created: 2021-06-29 20:33:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: 9e325880f0d6639c847079ec38fc9333 SHA-1: 31d3c1fe7dfe525a93ad98d14e8888ada1ac127c SHA-256: 69c6570cfd15bff2473dc4947b17585cdbfdca71d870d14b57a7664ec5616093
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a link farm that redirects to multiple domains, many of which are hosted on compromised WordPress installations. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. While no scripts were directly extracted, the structure and URL patterns suggest an attempt to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9639

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/2568d8211d5e63fb32ab1590b0782ef8/51497480010.pdf In PDF document text
    • https://torrentclub.vip/wp-content/plugins/super-forms/uploads/php/files/u1aai45edbrs00420are57d8ec/62997451978.pdfIn PDF document text
    • http://texmet.pl/userimages/file/31575876222.pdfIn PDF document text
    • https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/1609e144d651e1---zaforirosuwuxal.pdfIn PDF document text
    • http://inarchengineering.it/userfiles/files/mobevomujonaweximu.pdfIn PDF document text
    • http://klefmarken.se/upload/file/58778842507.pdfIn PDF document text
    • https://muratay.nl/userfiles/file/63699756165.pdfIn PDF document text
    • https://sandalyecenneti.com/wp-content/plugins/super-forms/uploads/php/files/5lgr6f3hea6l9avh2e4bljreg9/34701701610.pdfIn PDF document text
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16077691736a15---gowenerovukoza.pdfIn PDF document text
    • https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b99c24f1a3---todisipejejesifug.pdfIn PDF document text
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/9f9bf3bd9b378d6b0292d14d49b44918/58902523612.pdfIn PDF document text
    • https://givemeit.ru/wp-content/plugins/super-forms/uploads/php/files/c02e61c208d97360a9d2151b3e4f6a27/zevuwisewufapisake.pdfIn PDF document text
    • https://www.a2zmedical.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb0abad7f8---46937043549.pdfIn PDF document text
    • http://hanasushipickup.com/uploads/files/jejunejunemusolomoguxal.pdfIn PDF document text
    • https://aashianarealty.com/file/fejagetumud.pdfIn PDF document text
    • http://dabbleanddesign.com/clients/c/c6/c60e280709801842a26e47e23f21f170/File/pekojigobefupujorediz.pdfIn PDF document text
    • https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/3p7o09u8h0qn97urdj4detrck0/2414307035.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/05d5fd7c4b674f7ec1e43d549e2bc9f8/tibefobatibemij.pdfIn PDF document text
    • http://nhs1966reunion.com/clients/1/1c/1ca8f1639ee69cd7806809ed3bcda9bb/File/68920548590.pdfIn PDF document text
    • http://chagatea.ru/wp-content/plugins/super-forms/uploads/php/files/b1ef26f183bf8f0151d6df5d09c58a61/wogegigejimudevojan.pdfIn PDF document text
    • https://grahampropertytax.com/wp-content/plugins/super-forms/uploads/php/files/db15e9aa791b1077e610f9430af78a4a/83538985153.pdfIn PDF document text
    • https://legacyltg.com/wp-content/plugins/super-forms/uploads/php/files/133e7ace0488d6ffac6a545c58fd2ce1/kopejowiberaduw.pdfIn PDF document text
    • http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098c30e7497d---teguxijepu.pdfIn PDF document text
    • https://topinsolventa.ro/userfiles/file/24878257780.pdfIn PDF document text
    • https://bikidi.com/UpFiles/WebEditorFiles/file/74720141526.pdfIn PDF document text
    • https://www.paparazzirestaurant.com.au/wp-content/plugins/super-forms/uploads/php/files/dd30620949bea23e930ec579d531061c/vasoti.pdfIn PDF document text
    • https://retentionstudentexperience.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d5743b82397---97574304654.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=equal+ratios+and+proportionsPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001294e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1294E 19640 bytes
SHA-256: 7ce7746c6cec06ff3a927dc22dd8e468007b2390b92d1bdee743947f6d0eef38
font_01_sfnt_off00015cf5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15CF5 16140 bytes
SHA-256: 309973d93049fd442947802560172466956b0acefca68a7b3d7869ed04227443
font_02_sfnt_off0001725d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1725D 10480 bytes
SHA-256: 5f32b6cafc1785552b63c2b1f0f6c5d9b7636bb7a2bebde91090ab632f1b5cde
font_03_sfnt_off00018a02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18A02 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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