Malicious PDF — malware analysis report

Static analysis result for SHA-256 da088b3ddbf07021…

MALICIOUS

PDF

103.6 KB Created: 2021-08-06 20:29:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: f65bbd0ceec20fc9434908918c4b87f6 SHA-1: 727c92b6c69ee22ed14112d52ddd545d77027779 SHA-256: da088b3ddbf07021a0e919ce30fb41d88bf30e7c365130814e001c0720ab1f26
156 Risk Score

Malware Insights

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

This PDF was flagged by a machine learning classifier and ClamAV as malicious, indicating it likely exploits a vulnerability or contains malicious content. It contains numerous links pointing to compromised websites and disposable hosting, suggesting a phishing or malware distribution scheme. No scripts were extracted, but the PDF structure and link farm heuristics strongly indicate a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9931

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://portugaliaimagyarok.com/ckfinder/userfiles/files/95807324542.pdf In PDF document text
    • http://acpiindia.com/userfiles/file/22655729038.pdfIn PDF document text
    • http://shethof.ch/cgi-bin/dynamisch/file/8763726477.pdfIn PDF document text
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c07d27539fc---14382937980.pdfIn PDF document text
    • https://www.xcelsus.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609aab9c6adb0---dopuxasebotowaxizule.pdfIn PDF document text
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa83029aba6---69210224190.pdfIn PDF document text
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb4ddb62253---68804891450.pdfIn PDF document text
    • https://dailyhondaotomientay.com/upload/files/33709303749.pdfIn PDF document text
    • http://noxsun.com/jingkelun/userfiles/files/20210717120459.pdfIn PDF document text
    • https://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/duv44q11t0idcdplgvvck4m1vd/31226267648.pdfIn PDF document text
    • https://rh4-h1tapi-turbo.com/contents//files/zapoxevirirawolububetamol.pdfIn PDF document text
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160c47adb1f7fc---faborofinimikebowipuvip.pdfIn PDF document text
    • https://autotrans911.com/thread/admin/uploads/file/81672393256.pdfIn PDF document text
    • http://mywayrtk.info/userfiles/file/64069627393.pdfIn PDF document text
    • http://dkkarsin.pl/img/upload/files/zuwoxupovejuwaf.pdfIn PDF document text
    • https://gulfcans.com/home/madarmun/public_html/gulfcans/images/bulk_images/files/fegemavelabaze.pdfIn PDF document text
    • https://lakecountyoralsurgery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d1f1feacec---82182336348.pdfIn PDF document text
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606efcd6bcad6---44279516060.pdfIn PDF document text
    • http://www.misshandicap.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160b0b0c390c05---76837484401.pdfIn PDF document text
    • http://qlionshousing.ca/userfiles/file/17600569749.pdfIn PDF document text
    • http://koszyczarek.pl/userfiles/file/ralemakizaserebimobobut.pdfIn PDF document text
    • https://www.qbuildsoftware.com/wp-content/plugins/super-forms/uploads/php/files/dc5dd3496c22175890e2bad328d7fe77/74355439293.pdfIn PDF document text
    • http://alemotta.com/resources/original/file/lalozowofedabaf.pdfIn PDF document text
    • http://marcth.pl/media/fck/file/3093286430.pdfIn PDF document text
    • https://hoffmanowska.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1606ced747cd58---ganibaxapugotarome.pdfIn PDF document text
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608bf408abad1---sigapubonisu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=the+history+and+culture+of+pakistan+teachers+guidePDF 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_off00012e4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E4F 11168 bytes
SHA-256: 46b28ef5eba6f6c8ba90c3e3a870811bbee838cc58e225e164b6857f16d07c78
font_01_sfnt_off00014839.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14839 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001604b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1604B 17532 bytes
SHA-256: 5b12af687505caccbf55fdd42edf6d8458ddfa1006e037215797e0758461ad30

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