Malicious PDF — malware analysis report

Static analysis result for SHA-256 69211f598f6c8433…

MALICIOUS

PDF

93.9 KB Created: 2021-07-19 12:55:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 83a158584a16281dce18af2bba708d2f SHA-1: 24e286f84546547002400d4e7d8da3e5285f2ed8 SHA-256: 69211f598f6c8433aeb0cba5d9a65dc51f8bc7bac07efa1bf55d3b436e0b8d64
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was identified as malicious by a ML classifier and ClamAV, indicating a high likelihood of malicious intent. Heuristics indicate the document functions as a link farm, directing users to compromised WordPress sites and potentially disposable hosting. The embedded URLs suggest an attempt to distribute further malicious content or engage in phishing activities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9937

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 http://opalbiosciences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b96d83e8e25---29965697170.pdf In PDF document text
    • https://sgdivorcelawyers.com/wp-content/plugins/super-forms/uploads/php/files/9c041114a006e4a8c0f422920974c1d0/rizuregexuk.pdfIn PDF document text
    • http://jointrilogy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad27b656d48---73483395730.pdfIn PDF document text
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/160859cbb9d948---rewojevurep.pdfIn PDF document text
    • https://gloriouz.in/ckfinder/userfiles/files/rixolajewafelisesabafaw.pdfIn PDF document text
    • http://henri-ruch.ch/doc_pub/file/gerubekizefi.pdfIn PDF document text
    • https://evpersoneli.net/ev-personeli/file/91638260312.pdfIn PDF document text
    • https://www.reachcast.ca/wp-content/plugins/super-forms/uploads/php/files/53dd4497b7105de1d1e9f4c1d19fab5d/4633783457.pdfIn PDF document text
    • https://goldengrowers.com/wp-content/plugins/super-forms/uploads/php/files/a1f1c3480b9c98b2c65548e9c1e11eee/76258448591.pdfIn PDF document text
    • https://tocgia247.com/wp-content/plugins/super-forms/uploads/php/files/8f05b01bdj7n7ghsp68n2c5npo/dezumilibew.pdfIn PDF document text
    • http://hongshengfish.com/uploadfiles/2021052805355996647.pdfIn PDF document text
    • http://absolutelyneon.com/userfiles/file/89355047377.pdfIn PDF document text
    • http://alphabodysupplements.com/newerac2c/userfiles/file/bitaxegijavefozabokej.pdfIn PDF document text
    • https://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bdd90162aca---65140217001.pdfIn PDF document text
    • https://ph2020.org/FCKeditor/file/8984760321.pdfIn PDF document text
    • https://www.xcelsus.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bc3cf9cbbe0---xetoguwobe.pdfIn PDF document text
    • https://fedico.ca/upload/editor/file/43200585835.pdfIn PDF document text
    • https://howardsteeves.com/wp-content/plugins/super-forms/uploads/php/files/41d5ea7229d40587a9ceb46dbaf8af19/gezagutodogolapubow.pdfIn PDF document text
    • http://purpledoorchurch.com/wp-content/plugins/formcraft/file-upload/server/content/files/160746220996fc---buvisik.pdfIn PDF document text
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2bff5250a5---dagewefefufu.pdfIn PDF document text
    • http://www.climatisur.com/ckfinder/userfiles/files/8495518891.pdfIn PDF document text
    • https://pirkitpadangas.lt/ckfinder/userfiles/files/bunabusevitareromim.pdfIn PDF document text
    • http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160f3fd25a8e60---83506488835.pdfIn PDF document text
    • https://maspacientes.es/wp-content/plugins/super-forms/uploads/php/files/um41em8qro9mh83dg53948sk6a/92242967794.pdfIn PDF document text
    • http://ngor2-3.com/file_media/file_image/file/43481672451.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=after+effects+intro+template+free+downloadPDF 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_off00010b8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B8B 17364 bytes
SHA-256: be9f814dd51859eee1111977284be79c7f4f46602e04b1bb86301e9ce483d82f
font_01_sfnt_off000138f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x138F7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001510e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1510E 10848 bytes
SHA-256: f589a95389ac0cfc321228b5f06c38906ea58d85706a64425c660ecde8f7a1a3