Malicious PDF — malware analysis report

Static analysis result for SHA-256 569798154d49d1ee…

MALICIOUS

PDF

107.2 KB Created: 2020-11-22 23:58:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: d72a203751ee724301ddf9dbc5310eed SHA-1: 9845497fb142008fe191d8d7a42f19bf4f050125 SHA-256: 569798154d49d1eea19d3da2869a40688aa25b225e67f190797a0229c7c6ac16
244 Risk Score

Malware Insights

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

This PDF file contains a large number of embedded links, many of which point to disposable hosting services and known malicious redirectors. The primary purpose appears to be a link farm designed to direct users to potentially malicious content or phishing sites. The ClamAV detection and ML classifier strongly indicate malicious intent, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://traffmen.ru/123?utm_term=ck2+holy+roman+empire+title+id In PDF document text
    • https://jezaxegare.weebly.com/uploads/1/3/1/3/131380636/kodikisogate.pdfIn PDF document text
    • https://miremewokar.weebly.com/uploads/1/3/0/7/130738658/zadabanab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416918/normal_5fa8ba3c18b45.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382966/normal_5fa4e1bed6f04.pdfIn PDF document text
    • https://bumenabizobopum.weebly.com/uploads/1/3/4/4/134462968/labixesirojifeziv.pdfIn PDF document text
    • https://pejapuvurexoku.weebly.com/uploads/1/3/1/6/131636728/0d9348d73889d98.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381971/normal_5f8bb1a117587.pdfIn PDF document text
    • https://wilalunawotepa.weebly.com/uploads/1/3/4/6/134608105/965167e2a.pdfIn PDF document text
    • https://gurivarux.weebly.com/uploads/1/3/4/3/134309953/sopojedize-kenede.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403684/normal_5f970fbbc3c85.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/1ab1143b-986b-4e62-b202-8564f2a73d8e/sps_conference_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/dobesogum/wemowozamikatapotamuladul.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62249a83-0281-4c27-8fad-7a5de14fa393/dupabefimafev.pdfIn PDF document text
    • https://s3.amazonaws.com/zetubakuz/plural_possessive_nouns_worksheets_for_grade_1.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01030934-b076-43b5-8330-f3e33baf0918/vaxoroluw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/86bc1f9d-b98b-470f-b634-fea1487883b2/89403384458.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_off00016af0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16AF0 5224 bytes
SHA-256: baaa93960ee6192b85846dac6ab5dc9db3244239be52e373fde44bad6a0f4c95
font_01_sfnt_off00017c90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17C90 10452 bytes
SHA-256: 432438e6605af8ab5521a08fd3dec272c593b8361509ce2c2dad2077cdadb4a0