Malicious PDF — malware analysis report

Static analysis result for SHA-256 a492baa302f33d55…

MALICIOUS

PDF

32.6 KB Created: 2020-11-04 07:51:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: c257d5150d562c75ebec491cc7392960 SHA-1: a0788cfe8c7375b0bc8b1e503b48de34c7492549 SHA-256: a492baa302f33d55bb543f50813f3315c2a12cda0aa2ef1c6af7b66b87e556fa
122 Risk Score

Malware Insights

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

The PDF document contains embedded links that redirect to malicious infrastructure, specifically a link farm designed to lure users with promises of gift card generators. The ML classifier strongly indicated maliciousness, and the document body, though partially obfuscated, contains text related to the lure and references to malicious URLs. The presence of multiple links to disposable hosting and redirector infrastructure suggests a phishing or scam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 3

  • 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 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.
  • 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://ggtraff.ru/aws?keyword=free+amazon+gift+card+code+generator+2018 In PDF document text
    • https://kutesavakelex.weebly.com/uploads/1/3/4/3/134336058/darol.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446491/normal_5fa111765c32f.pdfIn PDF document text
    • https://vafumigoku.weebly.com/uploads/1/3/1/3/131384305/3177289.pdfIn PDF document text
    • https://xikemusuvef.weebly.com/uploads/1/3/4/3/134322181/lenamomoju.pdfIn PDF document text
    • https://rimesozarabef.weebly.com/uploads/1/3/1/6/131607712/59e18c2f1d0bf5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419818/normal_5f9ae147c2d2a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378605/normal_5f91340e08184.pdfIn PDF document text
    • https://debemalimuwu.weebly.com/uploads/1/3/4/3/134385929/depoka.pdfIn PDF document text
    • https://kofejadadamutu.weebly.com/uploads/1/3/4/3/134348877/21191e0e612ebcf.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/tugumeb/libro_fisco_agenda_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/wipotegadodorek/vorilabud.pdfIn PDF document text
    • https://s3.amazonaws.com/fulosobezur/16231116898.pdfIn PDF document text
    • https://s3.amazonaws.com/sesafefanulokam/8th_grade_science_staar_review_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/zixenebi.pdfIn PDF document text
    • https://s3.amazonaws.com/widofafane/john_milton_poems.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006c57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C57 5656 bytes
SHA-256: 689485f94da34a7496f00f0e73f5f2e3324e8266c59f5fe00b813d97c677772a