Malicious PDF — malware analysis report

Static analysis result for SHA-256 a281cadba54a6f8f…

MALICIOUS

PDF

73.1 KB Created: 2021-03-14 22:33:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: c8cd502256c49a1659f2f2cf40fc506b SHA-1: c361db9b74a99c26f698ef9b68d6eed0f61b3619 SHA-256: a281cadba54a6f8fad2407680bf960dc033778e879ee657083e40fe606214226
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 0.9995

Heuristics 5

  • 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 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://jottigo.ru/wix?keyword=pearson+drive+right+eleventh+edition+pdf PDF link annotation
    • https://kagilovudugavap.weebly.com/uploads/1/3/1/1/131164538/761608.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413019/normal_603889888581c.pdfIn PDF document text
    • http://eyebrowthreadingdallastx.com/fluval_fx5_filter_setupy5lrh.pdfIn PDF document text
    • https://bunavomotuta.weebly.com/uploads/1/3/4/6/134606544/rimakawesolapaz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470979/normal_602a1d3b9aaf8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461207/normal_604a207da3913.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421614/normal_603b39c759b3c.pdfIn PDF document text
    • http://zoo-taxi.site/66395068445910zx.pdfIn PDF document text
    • https://cdn.sqhk.co/kaxiteparam/YhjTtjc/a4_24_label_template_word.pdfIn PDF document text
    • https://suzagadagaxu.weebly.com/uploads/1/3/0/7/130775939/5716962.pdfIn PDF document text
    • http://domensita.fun/3d_model_free_for_blenderlbwz6.pdfIn PDF document text
    • https://ritosameb.weebly.com/uploads/1/3/4/2/134266106/bepibunad.pdfIn PDF document text
    • http://cardioactiveitalia.site/robert_morris_the_blessed_life_dvd_seriesyhqg6.pdfIn PDF document text
    • http://hotsales-com.xyz/kanofubosawogetusube77il5.pdfIn PDF document text
    • https://cdn.sqhk.co/potasuregoz/heBjcjj/encyclopedia_definition_of_religion.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/2d9dc9d9-9415-490f-a6b1-ac909164012b/from_a_to_zay_price.pdfIn PDF document text
    • https://6d706a39-1f93-4f1a-9423-caccf7e65e71.filesusr.com/ugd/69f91f_3ac82883de894643b82e1273356011da.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/adea750f-1c6e-41b0-8dd9-161c3f9524c3/51795519838.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b328c667-dd6c-40fb-9b2f-71c0b0f20a97/oracle_database_19c_upgrade_virtual_classroom_series.pdfIn PDF document text
    • https://8a05da06-75fd-4b4b-8779-f7668a2fa4a0.filesusr.com/ugd/da32d9_45b27c5782aa493487d9ffd52546b52e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/37cc8c1e-9466-45d0-881a-4c378aea5d65/sisojuxukatifulebuju.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/09c99838-ef6f-4cd5-adbe-de1600ae62b3/4385373356.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d17e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD17E 5152 bytes
SHA-256: 962df2cdb2ebd0cf14317544635a330617a2b46937fce45aa4bf535e8d296623
font_01_sfnt_off0000e304.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE304 11232 bytes
SHA-256: bc6da4092935f5129a12ee30aad5d16e09384343e914c180aab626513a2d5e04
font_02_sfnt_off00010889.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10889 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

Open this report in the interactive analyzer, or submit your own file for analysis.