Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4ca141e4c11a381…

MALICIOUS

PDF

83.7 KB Created: 2021-04-03 02:38:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 1de13314c0c07ea2ea1986c5ae21618d SHA-1: 593d346be98f3eb8c76ca8120980264e068ce2a0 SHA-256: c4ca141e4c11a3816b947eb769dd4ae9eb8b2ea8d3af7ae9a48f2f6c6561f292
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-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://lozipotod.ru/wix?keyword=download+apk+showbox+for+pc PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4465267/normal_5ffd1ac00a324.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459463/normal_6038d34f25237.pdfIn PDF document text
    • http://luzupogakij.sportsontheweb.net/42819497201.pdfIn PDF document text
    • http://instup.xyz/baku_azerbaijan_tourist_informationx6eak.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386094/normal_5ffb95ba696d7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471960/normal_5fd259e671da0.pdfIn PDF document text
    • http://merulabodonulu.iblogger.org/atividades_de_alfabetizao.pdfIn PDF document text
    • http://selozufuwadapuw.66ghz.com/activesheet._showalldata_class_failed.pdfIn PDF document text
    • http://antonio-ita.space/195174591061t63f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479684/normal_603bb2302e3de.pdfIn PDF document text
    • http://creditscorehelp.info/25536803647mw7ho.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413119/normal_600cde3c88a48.pdfIn PDF document text
    • http://dawexefif.getenjoyment.net/romeo_and_juliet_essay_prompts.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470972/normal_602b0309d625b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://47c0d0ed-94e3-447f-940a-e265262d053f.filesusr.com/ugd/a43ec6_3b0d5c9b9d9b42768e0127766afdc64c.pdf?index=trueIn PDF document text
    • http://jeneviwa.epizy.com/xenamuzotebexatufidox.pdfIn PDF document text
    • https://6d428a25-da86-44fa-8f13-5b0f09742281.filesusr.com/ugd/3649d2_298b1f8191fd44d98b208272d02c4028.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
    • 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_off0000f2a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2A9 5604 bytes
SHA-256: 5020a1c80012346a6b4bd507f7e8250a4bebc23faebd4c06e2df89d35e3c16bb
font_01_sfnt_off000105d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105D1 11144 bytes
SHA-256: 056ecddb11f6121f96b31b45a12151ca5a169d349d934cf95af0230dcf15dfc9
font_02_sfnt_off00012be5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BE5 16344 bytes
SHA-256: f3b95f1269985bafc3dfb9b5b35e76df8a4d57039a143c013aed99c7cf3a4a89

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