Malicious PDF — malware analysis report

Static analysis result for SHA-256 d990e98165c881b7…

MALICIOUS

PDF

81.7 KB Created: 2021-03-23 22:38:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: a08f2966401796e546de42e4f90f49fb SHA-1: 56930a1bc76774ae2dc66a3a7a7e396ac7f8477f SHA-256: d990e98165c881b7725b7c3174e95badbc383681a4d852d2a349f8d70b0ea6f4
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://zajinet.ru/wix?keyword=gravity+fsx+1.0+vs+2.0 PDF link annotation
    • http://pshcomonhere.xyz/garrett_ace_250_instructions5y96o.pdfIn PDF document text
    • http://shtancircul.site/resumen_del_libro_12_cuentos_peregrinos_por_capitulosfkrac.pdfIn PDF document text
    • https://cdn.sqhk.co/mivijigonof/fLggidn/8459940446.pdfIn PDF document text
    • http://usacreditreport.info/xefalimipilelegafamofigiu6qkr.pdfIn PDF document text
    • http://maska-respirator.com/hyrule_warriors_all_characters_and_weapons9rjrp.pdfIn PDF document text
    • http://picsonair.com/92307001833pbclf.pdfIn PDF document text
    • http://byt-upak.ru/484752873412cy4o.pdfIn PDF document text
    • http://itdomen.fun/dimemenokusegafovezimarinj3smp.pdfIn PDF document text
    • http://dorightschool.com/arditi_del_popolo39ngo.pdfIn PDF document text
    • https://cdn.sqhk.co/mafozerekat/raiaG1J/freeway_chevrolet_phoenix_arizona.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/075f7ced-e4b9-4c3d-99bd-caa26c5a7c9b/63032159417.pdfIn PDF document text
    • https://72a23b54-95c1-47c0-80d6-f7b1310faeb8.filesusr.com/ugd/65b209_bc16caa323e643b3ad76887b61b8e1a4.pdf?index=trueIn PDF document text
    • https://ab2ac9d4-4772-4872-829d-c19fde0a4f90.filesusr.com/ugd/b919b3_11ede58f5de44132aeaf7ce8e533ad83.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d25463e-8cde-452b-b6a1-858f5d3b96b8/tom_sawyer_questions_and_answers_chapter_2.pdfIn PDF document text
    • https://2eda13a9-9e0f-47dd-bbfa-a9a5028a3314.filesusr.com/ugd/61c57f_7a2b4305fd9f4d47a73cc5d4b324821d.pdf?index=trueIn PDF document text
    • https://198d5876-2e36-4a54-a59d-b4c1060b65be.filesusr.com/ugd/4733ca_39a6d1836d5e495c9c6221f4f2a1d074.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c2c135f-7c0b-45c2-b5ff-2dab4f06fb15/what_is_the_significance_of_the_mockingjay_in_the_hunger_games.pdfIn PDF document text
    • https://87164119-88a6-4d6d-a72f-b109cf2d88b9.filesusr.com/ugd/bd0a66_9dbcb1e4c23c489f800978668e4136ff.pdf?index=trueIn PDF document text
    • https://2cc12256-1025-444a-bacb-901a9f007bda.filesusr.com/ugd/d1fcfc_1461819866ed43f48a123d69f8376103.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_off00010245.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10245 5348 bytes
SHA-256: c2a6b17917f4b7024d88f40dd27e0166a059b54c08bdac087942e36457a97ecc
font_01_sfnt_off000114a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114A2 10944 bytes
SHA-256: d2178b8ca2ac4ee9cd993f8a9824aa1a9435ee3cbfebe8ea408cdc2d3ba8bd2d

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