Malicious PDF — malware analysis report

Static analysis result for SHA-256 10612a4fd8ead564…

MALICIOUS

PDF

71.0 KB Created: 2021-02-12 00:10:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: cf298887afad7d1588d9f6270cddd98b SHA-1: 2d034db6275d81286005116afb775632cf20d6ad SHA-256: 10612a4fd8ead564d12168f347ca6a35fd997dd46130d960140af96098d06d0a
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The presence of a large number of external links, including a link farm heuristic, suggests a malicious intent to redirect users to potentially harmful websites. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a phishing or SEO spam campaign.

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://seumenha.ru/123?utm_term=manual+woodworkers+weavers+bat+cave+nc PDF link annotation
    • http://vuwazakuzasoz.iblogger.org/all_around_the_world_atc.pdfIn PDF document text
    • https://jiresuzava.weebly.com/uploads/1/3/4/7/134706808/e59ec2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387424/normal_6010ee75b615b.pdfIn PDF document text
    • http://lonagonem.22web.org/betaflight_4._0_software.pdfIn PDF document text
    • https://gixebodaloru.weebly.com/uploads/1/3/1/3/131379223/3233967.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500677/normal_5fd14af953ad4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470532/normal_600c651016b77.pdfIn PDF document text
    • https://nigafabap.weebly.com/uploads/1/3/4/3/134377596/rirasato_rixezonujifi_mosalukugepiw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gituloropo.rf.gd/ratova.pdfIn PDF document text
    • https://s3.amazonaws.com/wokesabisevo/25020782373.pdfIn PDF document text
    • https://s3.amazonaws.com/zonebon/67772012658.pdfIn PDF document text
    • http://laxaguwen.epizy.com/57223130937.pdfIn PDF document text
    • https://s3.amazonaws.com/xesigeze/buterusolux.pdfIn PDF document text
    • https://s3.amazonaws.com/zuponefi/sabedexuwowopazotonaxalol.pdfIn PDF document text
    • https://s3.amazonaws.com/fuzafuzeruwit/bibinuwe.pdfIn PDF document text
    • https://s3.amazonaws.com/fakuguvil/16631405072.pdfIn PDF document text
    • https://s3.amazonaws.com/rowubunak/boardworks_ltd_2011_answers.pdfIn PDF document text
    • http://toxawilel.epizy.com/xelilakigivateteraj.pdfIn PDF document text
    • http://pomixaso.epizy.com/android_authority_best_cheap_phones.pdfIn PDF document text
    • http://wuparol.epizy.com/geological_structure_and_landforms.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_off0000d421.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD421 5296 bytes
SHA-256: cf72324fcb671cc5be269e8fa3d9f3e0e5bc8e892fa177471226cd7d6b943324
font_01_sfnt_off0000e655.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE655 11968 bytes
SHA-256: f8b67abe034aeaec39423efd3f1d5b644e5757b4a19b4b6c1de31711967ddfd1

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