Malicious PDF — malware analysis report

Static analysis result for SHA-256 e59a1a264a7a7d3d…

MALICIOUS

PDF

66.5 KB Created: 2020-11-27 10:11:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: fb5470997de903e69dd9f3adcdaa63e9 SHA-1: 1644630317acaedb7c48565574486d0050373b09 SHA-256: e59a1a264a7a7d3da64cfba73bd5c51620e665d10cbe00bbb3a302bcc77d22ce
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, flagged as a link farm, directing users to potentially malicious websites. ClamAV and ML classifiers identified this file as a phishing or malicious PDF. The embedded URLs suggest an attempt to redirect users to external content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://traffnew.ru/aws?utm_term=verdon+gorge+kayak+guide PDF link annotation
    • https://xekexudaxojow.weebly.com/uploads/1/3/4/3/134365032/binikunazo-xisevo-takug.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426945/normal_5faabc52a4c53.pdfIn PDF document text
    • https://lagukekejase.weebly.com/uploads/1/3/0/8/130815031/9303ff67d90.pdfIn PDF document text
    • https://dudikojegak.weebly.com/uploads/1/3/1/4/131406444/4485152.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/ebaca081-024c-444f-889f-764820d3b3f3/41663429521.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/19ad31f2-97f4-4933-b4c6-9db189c36565/94664010547.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2fa0960-d256-4bf9-9eb0-ed61721ce27d/calculation_of_drug_dosages_10th_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/93ee1ffc-878c-4bda-a603-df76f36869b0/windows_10_activator_reddit_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/wifukedot/financial_accounting_and_reporting_1_reviewer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d4fd18c-cbd5-475b-96bb-00abfcc1fce3/blue_collar_brilliance_rhetorical_analysis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/079d9699-23db-4bfa-a23c-ed0b12b2105d/1330812910.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_off0000c92b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC92B 4916 bytes
SHA-256: 5966e1ae6966b28706d60c773bf922a506264a899346cbecf6b50196ae9c4191
font_01_sfnt_off0000da03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA03 10548 bytes
SHA-256: d08c75a75b51d705e04c4f9874911309d3c58cb6bbac890a60468dfdb73246a3

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