Malicious PDF — malware analysis report

Static analysis result for SHA-256 de44455cdefa8265…

MALICIOUS

PDF

91.0 KB Created: 2021-03-28 20:55:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 2187fe256482dcc0378cd4de8567e7ec SHA-1: 55f254b6f447bd78c93191544dbfb4117e5d7ec5 SHA-256: de44455cdefa8265f0812e12dac3c47a1480cbd335c16c6650420543b76867a5
186 Risk Score

Malware Insights

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

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 0.9996

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
  • 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.
  • 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://crophysi.ru/wix?keyword=global+drone+x183+manual PDF link annotation
    • https://cdn.sqhk.co/gawagunikuw/4gddjic/85798910866.pdfIn PDF document text
    • https://cdn.sqhk.co/nivodoruw/jg9lmXa/nesixigatisazen.pdfIn PDF document text
    • https://cdn.sqhk.co/wizokawoxo/Nhciagi/fugoja.pdfIn PDF document text
    • http://tokio-2020.fun/wosomop93f81.pdfIn PDF document text
    • https://vuginavoji.weebly.com/uploads/1/3/0/7/130775358/9788119.pdfIn PDF document text
    • https://cdn.sqhk.co/ratosakip/gfWhfgg/union_and_intersection_of_sets_worksheets.pdfIn PDF document text
    • http://tersq.space/algebra_1_chapter_1_test_answer_key7f58o.pdfIn PDF document text
    • http://emmetrix.net/adiabatic_demagnetisationlokr6.pdfIn PDF document text
    • https://ziluxokoker.weebly.com/uploads/1/3/4/3/134392919/rupufiv.pdfIn PDF document text
    • http://all-host.site/operaciones_combinadas_con_fracciones_algebraicas_ejercicios_resueltosdqof8.pdfIn PDF document text
    • https://vagapirub.weebly.com/uploads/1/3/4/6/134648019/dbb706.pdfIn PDF document text
    • http://marketes.pro/psd_brochure_templatessgkk5.pdfIn PDF document text
    • http://akb54.ru/22888528674drek.pdfIn PDF document text
    • http://nickned.me/natomofafefona566qk.pdfIn PDF document text
    • http://fdvsefwfrw.space/bootstrap_4_admin_dashboard_templatesr63id.pdfIn PDF document text
    • http://giftcard-sale.store/a_series_of_unfortunate_events_season_3_episode_74jx2e.pdfIn PDF document text
    • http://bioforce-co.site/zapikomusorofosikozxdfd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/xozeb/polaris_magnum_425_carburetor_diaphragm.pdfIn PDF document text
    • https://s3.amazonaws.com/lonozote/rimas_y_leyendas_resumen_el_beso.pdfIn PDF document text
    • https://s3.amazonaws.com/kufazete/92605169769.pdfIn 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010f5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F5A 5444 bytes
SHA-256: f132bf4c6eff2318e9f210a230be2505dbd2ae4cadbb196399f2d9e0a675353c
font_01_sfnt_off000121cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121CD 11552 bytes
SHA-256: 9ea2bab74b0e8db79d374f7b5e83581769183fe07c93567601f9d1505d33e6d6
font_02_sfnt_off00014953.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14953 16204 bytes
SHA-256: e93acd332f5893643511f4cefd38969ad5c744ad1b08842a788b6be7d277dd15

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