Malicious PDF — malware analysis report

Static analysis result for SHA-256 522298fdfc9121b0…

MALICIOUS

PDF

78.8 KB Created: 2021-01-15 16:27:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 5a735c562d0894402c0aa9f941f87ef7 SHA-1: d00b504b49ace9052598f5dfc243a6e553c820e9 SHA-256: 522298fdfc9121b02e44a0d233eeacea02dae88d00dbfb029bacc5abee385391
156 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9998

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 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.
  • 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://trafficel.ru/123?utm_term=windows+xp+activation+crack+tool PDF link annotation
    • https://kikurexabo.weebly.com/uploads/1/3/5/3/135325422/polerase.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416660/normal_5fdf6da076a76.pdfIn PDF document text
    • https://site-1168242.mozfiles.com/files/1168242/mermaid_wallpapers_for_iphone.pdfIn PDF document text
    • https://cdn.sqhk.co/zenetofuma/08jicYU/rirazan.pdfIn PDF document text
    • https://wekosidofanepa.weebly.com/uploads/1/3/2/6/132696212/soluwe.pdfIn PDF document text
    • https://site-1241720.mozfiles.com/files/1241720/95395991646.pdfIn PDF document text
    • https://site-1171112.mozfiles.com/files/1171112/22642123164.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422148/normal_5fcd40b982283.pdfIn PDF document text
    • https://site-1168244.mozfiles.com/files/1168244/57952297030.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371809/normal_5f900e814d936.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4505125/normal_5fe66a64a3d82.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454432/normal_5fc024d4a145b.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/genijusemu/gazprom_marketing_and_trading_annual_report_2017.pdfIn PDF document text
    • https://s3.amazonaws.com/jarirotexab/51240790025.pdfIn PDF document text
    • https://s3.amazonaws.com/murudute/manualidades_con_material_reciclado_carton.pdfIn PDF document text
    • https://s3.amazonaws.com/dozore/leaf_anatomy_lab_52_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/tapelu/free_animal_habitat_worksheets_for_kindergarten.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

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_off0000e94e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE94E 3396 bytes
SHA-256: 019ae317c1ae45cf80e7afb453b05714fcc380a874e5f543d71113ea1553695c
font_01_sfnt_off0000f575.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF575 5364 bytes
SHA-256: 4c15a22d1c8e6148304bdd029bcf44d217e4726a3bc945947bd62235725d1d2e
font_02_sfnt_off000107e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107E2 10696 bytes
SHA-256: c2e31ce6ed8db1d5e093a2a514b28ff28ddcd5601db848fc3e8d2df52f0cb80e

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