Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e4c01e4ee6ff5d4…

MALICIOUS

PDF

86.2 KB Created: 2021-06-25 18:41:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 5e3d11ba44c3737256d11d1f19a4f726 SHA-1: a7af10b698f574f13aad9d08180adfa8e26b810b SHA-256: 1e4c01e4ee6ff5d4f798accb55acc139ef815c56d1955e63a26803d21a562456
196 Risk Score

Malware Insights

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

This PDF file contains multiple links pointing to compromised WordPress sites, indicating a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. The presence of numerous external URIs, many hosted on potentially compromised CMS platforms, points towards a tactic of distributing malicious content or redirecting users to phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 7

  • 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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093392f742e2---85654347380.pdf In PDF document text
    • http://abnicum.com/files/file/rozugetanir.pdfIn PDF document text
    • https://flycam.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1609a6acc156d4---xuxemakimowanoko.pdfIn PDF document text
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/1609c6d61c4e7e---bowiveku.pdfIn PDF document text
    • http://kingspec.su/wp-content/plugins/super-forms/uploads/php/files/q2lsqagm85oiqt4rl2gtrn4odf/sejumuxadekukitufozuwaf.pdfIn PDF document text
    • https://angkoronetour.com/userfiles/file/gijipoku.pdfIn PDF document text
    • http://1982thsreunion.com/clients/a/a8/a85c6617a93da1462bf6c3e7dda9c043/File/24263764068.pdfIn PDF document text
    • http://epoxidice.ro/mm/file/87495410384.pdfIn PDF document text
    • https://talaa-obour.com/webmisr/uploadwebmisr/file/lesowokotaxinaguzoso.pdfIn PDF document text
    • http://mognational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160804c989872f---rogatiwewizof.pdfIn PDF document text
    • http://suachuaspa.com/upload/images-content/files/sujibefu.pdfIn PDF document text
    • http://doublehappyvstheinfinitesadness.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081dff281d3c---fosuxesidenokede.pdfIn PDF document text
    • https://freedomtampons.com/wp-content/plugins/super-forms/uploads/php/files/e722c4c57349ab23a22ed73b266a3bc2/39937926097.pdfIn PDF document text
    • https://balance-global.com/wp-content/plugins/super-forms/uploads/php/files/f363e39vmk5d4isa2p631nnung/12906208660.pdfIn PDF document text
    • http://zjqzzx.com/uploadfile/file/2021052700025673499.pdfIn PDF document text
    • http://adance0112.com/upfile/editor/file/riwid.pdfIn PDF document text
    • https://feldmann-spedition.de/pics/userfiles/file/78318411143.pdfIn PDF document text
    • https://encouragingmath.com/wp-content/plugins/super-forms/uploads/php/files/45872f64036f89a8e541902b02e295d6/21386684088.pdfIn PDF document text
    • https://ccveg.org/wp-content/plugins/super-forms/uploads/php/files/vt7akkh6td72vt115peqn23v26/jibanomenapovaniborowox.pdfIn PDF document text
    • https://ajwatravel.com/wheelmarine/userfiles/file/23655276453.pdfIn PDF document text
    • https://pikewallis.no/wp-content/plugins/formcraft/file-upload/server/content/files/1607c97191aa41---4728255180.pdfIn PDF document text
    • https://binarbaidrealestate.com/public_html/userfiles/file/muzanerekagutiwobuzefakir.pdfIn PDF document text
    • https://vizzzio.ru/wp-content/plugins/super-forms/uploads/php/files/db186f5ced2abe16b4fe6d22cf0326c8/kakape.pdfIn PDF document text
    • https://cornerstonelaw.eu/userfiles//file/75196678684.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=colorado+avalanche+coaching+staffPDF 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_off0000ee0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE0D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001061f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1061F 17068 bytes
SHA-256: dc48d9d2336b881a38c092da1da761475671ac98ba717bcb29a5f34dcd94d285
font_02_sfnt_off000132e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132E2 10852 bytes
SHA-256: 2869ccca348b18c012969dc6d0664ef6cb444d0c0ba93ebf98e094c5f8fc9d08