Malicious PDF — malware analysis report

Static analysis result for SHA-256 2afba6613138fcbb…

MALICIOUS

PDF

81.3 KB Created: 2021-04-03 05:15:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 0433386f02bac20c8a2f375eb10ba568 SHA-1: d8f5b247d091d934ad9756d30eb59443febf7bc0 SHA-256: 2afba6613138fcbbf1f5e3c9eeb3186e5bc908cf3f28a4cc3dbbfea268fe53a5
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 0.9996

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 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://jottigo.ru/wix?keyword=list+of+religious+worldviews PDF link annotation
    • https://koloputumoti.weebly.com/uploads/1/3/4/8/134887370/dowilobowujato-xobotuwufavi-mugomapanifo.pdfIn PDF document text
    • http://bagagom.22web.org/definicion_de_tecnologia_educativa_segun_autores.pdfIn PDF document text
    • https://kotimujisozun.weebly.com/uploads/1/3/4/8/134880640/dufute-govadivudej.pdfIn PDF document text
    • http://dapobapi.22web.org/what_are_living_things_composed_of.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426810/normal_5fed8ff194783.pdfIn PDF document text
    • http://bezanaralizeke.iblogger.org/certificate_of_conformity_template.pdfIn PDF document text
    • https://wudonazig.weebly.com/uploads/1/3/4/6/134675044/5792aa2498.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443821/normal_606526dc7e69a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448357/normal_601c878bc7267.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/tenunud/tupajumobobewan.pdfIn PDF document text
    • http://wetoxisifogif.epizy.com/84757901396.pdfIn PDF document text
    • https://s3.amazonaws.com/wupiwupiwot/zurubik.pdfIn PDF document text
    • https://s3.amazonaws.com/genedonapubefe/12621002059.pdfIn PDF document text
    • http://rorufefujolag.rf.gd/crisc_study_material_free.pdfIn PDF document text
    • https://s3.amazonaws.com/rimejiguvif/didevaguvanowupimirageja.pdfIn PDF document text
    • https://s3.amazonaws.com/jimugivos/rakisifamix.pdfIn PDF document text
    • https://s3.amazonaws.com/rubidokezive/anti-_drug_antibody_formation.pdfIn PDF document text
    • https://s3.amazonaws.com/bufexa/cairn_india_annual_report_2016-_17.pdfIn PDF document text
    • https://s3.amazonaws.com/wupagivoz/fluke_fishing_report_2019.pdfIn PDF document text
    • http://tidewoxawutose.epizy.com/60894985095.pdfIn PDF document text
    • http://pulawev.epizy.com/moultrie_cell_camera_problems.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010266.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10266 4960 bytes
SHA-256: adada5f9234007f7dda83aa35bd66b939903c6e74b7e487cf43bde882ee417bb
font_01_sfnt_off00011371.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11371 10680 bytes
SHA-256: 4c6e9693b741653e3b1c2796a187a433316419da4e8cade70979c0630851f935

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