Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd4995dd00bdb1f3…

MALICIOUS

PDF

89.9 KB Created: 2021-02-12 03:46:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 1c770ba5158739b5d2164f1ba02b4a9f SHA-1: 59a5744afaa8094bd8364e5566820026bd235c79 SHA-256: bd4995dd00bdb1f3de848c40fbbd360d9e3fd036995fe8bfb69303589c845cf7
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 0.9997

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://leonvi.ru/wix?keyword=shelly+de+killer+sprites PDF link annotation
    • https://feronokemafa.weebly.com/uploads/1/3/1/1/131164109/nibopibara_zasopejelowajuv_jomuvexupaxaxil_jadumisagerubir.pdfIn PDF document text
    • http://dapodulasopo.iblogger.org/misunodavetezuj.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378827/normal_5ff82c53478d4.pdfIn PDF document text
    • http://gaydating.world/7458691021835rkk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463808/normal_6000ae1165b1e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391898/normal_600d2f8c9007e.pdfIn PDF document text
    • http://xenavowi.22web.org/challan_280_in_word_format.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pupovedifa.rf.gd/80993198841.pdfIn PDF document text
    • https://s3.amazonaws.com/zozuxukoxo/wisibokezekebexomazimus.pdfIn PDF document text
    • https://s3.amazonaws.com/jadudusujuje/hp_laserjet_pro_m402dne_spec_sheet.pdfIn PDF document text
    • http://susesibukof.epizy.com/49081500484.pdfIn PDF document text
    • http://viladanus.epizy.com/mashed_cauliflower_nutrition_information.pdfIn PDF document text
    • http://jagazuzigi.epizy.com/mikizivaxapogorukoru.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_off00010c1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C1C 6832 bytes
SHA-256: d13a24f896630770be99ad1a53f395251a378ade84633d719cf73952d8bc2053
font_01_sfnt_off00012374.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12374 5108 bytes
SHA-256: 29e5e87e8a252eb00f931d4154c5c42241db08743da0fc9ad6ff638ae6551801
font_02_sfnt_off000134d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134D3 11240 bytes
SHA-256: 100383bcd17e3d8d2b838f4a9e915ac3bc7e10c3decf09b4051dabf42d24c765

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