Malicious PDF — malware analysis report

Static analysis result for SHA-256 85529b9682098cec…

MALICIOUS

PDF

66.7 KB Created: 2020-12-27 00:38:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 221387d99dfe6f63c4697a09645db364 SHA-1: e0f6dca73a531c8109e8f58951f8b8b83056fa06 SHA-256: 85529b9682098cec1cf7396dfd1afbf4f3fb25bb70a10156c600012bdc150328
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 as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains a link farm with multiple external URLs, including one pointing to 'traffnew.ru', suggesting a phishing or malware distribution attempt. The presence of embedded links and the overall structure are indicative of a social engineering attack designed to trick users into downloading content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffnew.ru/123?utm_term=mcpe+16.0+full+apk PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4491965/normal_5fe3573f5cb61.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479917/normal_5fdef061b37a6.pdfIn PDF document text
    • https://punerumoluzes.weebly.com/uploads/1/3/4/8/134897399/6aaaa1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409606/normal_5fa7d90a83818.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365638/normal_5f86ff8501e40.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480594/normal_5faac25ed821f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a43cd33-b760-44be-9e71-188baeb712dc/zixujadomewofedodumufa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9fb42ae1-18ca-4f37-8414-288ba04a02af/56232951974.pdfIn PDF document text
    • https://s3.amazonaws.com/tupofelasujewas/aeschylus_agamemnon_summary.pdfIn PDF document text
    • https://s3.amazonaws.com/sazariwapa/vuvafeluvusijaxenelagi.pdfIn PDF document text
    • https://s3.amazonaws.com/jumedemimo/pathfinder_optimized_swashbuckler_build.pdfIn PDF document text
    • https://s3.amazonaws.com/xapidajovaji/annexure_d_form.pdfIn PDF document text
    • https://s3.amazonaws.com/piwupevivotixi/google_opinion_rewards_apk_download.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_off0000c8b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8B5 5184 bytes
SHA-256: 216709ea4e201ac1a2e0d3967b3c473fe05eb3cd5040f27b10ffd8104968d981
font_01_sfnt_off0000da96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA96 10496 bytes
SHA-256: 89d4ffd9154b9dd926b6a4e57d6b0fb69aee0008748bffb47df360f1a71f225f

Open this report in the interactive analyzer, or submit your own file for analysis.