Malicious PDF — malware analysis report

Static analysis result for SHA-256 dab34f1488d5b237…

MALICIOUS

PDF

67.8 KB Created: 2021-03-17 00:07:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: d9817b312481bae5cf623ba2b8af1a75 SHA-1: cdd1496bc8bcb600ae0466a78566372cee3c4695 SHA-256: dab34f1488d5b2372ebd69a30c6c4ff1ab2239fafecbaa1542e07b0f89f10e41
194 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The heuristic 'SE_INVOICE_LURE' suggests the document's content is intended to deceive users into clicking these links, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://dugedepap.ru/wix?keyword=play+doh+peppa+pig+school+bus PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4493553/normal_5fce95e4542c4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381738/normal_604eb4a11052a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401972/normal_602858133156c.pdfIn PDF document text
    • https://cdn.sqhk.co/ginijetemepa/gqojchf/87398456645.pdfIn PDF document text
    • http://xafesuvorolivig.scienceontheweb.net/ccna_discovery_1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393353/normal_5ffe032348347.pdfIn PDF document text
    • https://cdn.sqhk.co/mogudekusab/Hhbjbic/tuning_fork_sound_healing.pdfIn PDF document text
    • https://cdn.sqhk.co/bidelefo/Jkhbkif/92375583945.pdfIn PDF document text
    • http://xuxetosufuzo.getenjoyment.net/32224048949.pdfIn PDF document text
    • https://cdn.sqhk.co/kivuwutu/hhfhaii/36730526317.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487423/normal_60134b999ef9d.pdfIn PDF document text
    • https://cdn.sqhk.co/gozajare/tiejija/90810749177.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://8d684a1e-4078-49cd-b336-05adf09473b6.filesusr.com/ugd/2b25e8_821b84605c394bff8877672a63829557.pdf?index=trueIn PDF document text
    • https://d9226533-59f4-4737-ae77-cfa9cdee5378.filesusr.com/ugd/d7c203_d78bd736bb304788bce1852cff6bec5b.pdf?index=trueIn PDF document text
    • https://e216d865-ddc7-438b-99b2-64609380b1bb.filesusr.com/ugd/7ae8b3_efda1b69e11b48fb90d5fb86f3b68a74.pdf?index=trueIn PDF document text
    • https://01c4c9a3-ee74-4db9-a65d-799443b8dbf1.filesusr.com/ugd/a64c8c_16f425d8a1c94fcea564f9f161ebeca1.pdf?index=trueIn PDF document text
    • https://fccd5518-64e1-462d-9dbe-8d8d8a19ca7a.filesusr.com/ugd/eb005d_cf4e132ca99b41bb9abd095c1c3876ea.pdf?index=trueIn PDF document text
    • https://6b21c484-99f8-4e97-b77a-b77c054bfe5d.filesusr.com/ugd/f139d4_ec70ad4f9d7542b0820ea2c8b968ada1.pdf?index=trueIn PDF document text
    • https://d52aed46-be45-4f9b-8106-cf6fc7ee66c0.filesusr.com/ugd/b148e5_701e4356a96e446199defb4ecb927f2b.pdf?index=trueIn PDF document text
    • https://aece7fbc-7072-4055-9cfa-29e0da41b620.filesusr.com/ugd/e878fd_2a9715ad706c469a8c1bc335100a466a.pdf?index=trueIn PDF document text
    • https://b962d5b8-8819-42e3-9ba3-d95e8366760e.filesusr.com/ugd/f51585_14235532df6f4c96aa025323f47a99b1.pdf?index=trueIn PDF document text
    • 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c948.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC948 5484 bytes
SHA-256: 2c09a78a77335fa52e637e2dfe8f5b3606d277bd50542d85e9dd4d8a4ab9fa1b
font_01_sfnt_off0000dbf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBF3 10648 bytes
SHA-256: 8b397c2642b34e75de094f21d9c0af22da5375f0e5bd55b3bfc880f84db8fe88