Malicious PDF — malware analysis report

Static analysis result for SHA-256 7fdd05102460d83f…

MALICIOUS

PDF

70.2 KB Created: 2020-11-20 07:59:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: a2b5fac5ea036d953f1b089e4238de8a SHA-1: cdb9074e6f2faa197f610803433d379eb305d87b SHA-256: 7fdd05102460d83fb304f4fe2782a5c495acae063f9494d498d70c71181eb9ca
214 Risk Score

Malware Insights

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

This PDF file contains numerous links to external resources, including a known malicious redirector. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK and PDF_SEO_LINK_FARM indicate a strong likelihood of malicious intent, aiming to direct users to potentially harmful sites. The ML classifier also flagged this PDF with high confidence, supporting the assessment of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://cctraff.ru/aws?utm_term=makalah+bed+making+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4388276/normal_5f8e25402718d.pdfIn PDF document text
    • https://mapipuluzobeb.weebly.com/uploads/1/3/1/3/131398440/gewug_lavegeto.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/tetazino/9167683318.pdfIn PDF document text
    • https://s3.amazonaws.com/niporofez/earthquakes_worksheets_middle_school.pdfIn PDF document text
    • https://s3.amazonaws.com/jasadavebaga/jozazobenela.pdfIn PDF document text
    • https://s3.amazonaws.com/dudujopixejikug/guidelines_for_obtaining_meaningful_consent_canada.pdfIn PDF document text
    • https://s3.amazonaws.com/xisefowu/bakefuzib.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef3bbac0-c544-4852-858c-5d99e71689c2/kufizebur.pdfIn PDF document text
    • https://s3.amazonaws.com/tobobowu/unblocked_games_76_fall_boys.pdfIn PDF document text
    • https://s3.amazonaws.com/roware/dilibukogemiwexipoxomav.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6a03f03-6c8b-43ea-b036-951550242bf8/nanifemavaluguzibaxapa.pdfIn PDF document text
    • https://s3.amazonaws.com/midaguvimabof/gender_reveal_powder_with_tannerite.pdfIn PDF document text
    • https://s3.amazonaws.com/bulolimepol/64895034267.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_off0000d518.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD518 5392 bytes
SHA-256: a8b082b58cca0c4e95feea39cc4d2520123c86d1c3bc77bc0eb5122a9d595513
font_01_sfnt_off0000e753.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE753 10412 bytes
SHA-256: 825f1e3b029d3cc8c59e4e497c1f1b37b5930579165b922d070ba8e3e29b552b

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