Malicious PDF — malware analysis report

Static analysis result for SHA-256 155a21b5f8d48060…

MALICIOUS

PDF

65.4 KB Created: 2020-12-21 09:53:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 1d723ab444951ccceb8580e029c8f896 SHA-1: 9a4094889bcabf699c1b68a8e2ff373087cff15f SHA-256: 155a21b5f8d48060b93511b5687a9c01d9beccb07789f531c5d67f006e68c55d
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with at least two pointing to known malicious redirector infrastructure and a link farm. The ML classifier also strongly indicated maliciousness. While no scripts were directly extracted, the PDF structure and embedded URLs suggest an attempt to redirect the user to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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://gettraff.ru/strik?utm_term=goat+simulator+switch+physical+copy In PDF document text
    • https://dalowosa.weebly.com/uploads/1/3/4/3/134383453/3f14f44838048.pdfIn PDF document text
    • https://rofexigu.weebly.com/uploads/1/3/0/7/130738805/kukajobo.pdfIn PDF document text
    • https://peziwotikiju.weebly.com/uploads/1/3/4/6/134602895/zafapajuwe-motegoxugeg-zurexaxisov.pdfIn PDF document text
    • https://tulejimukun.weebly.com/uploads/1/3/4/3/134399478/dovopo.pdfIn PDF document text
    • https://gojudewusidaza.weebly.com/uploads/1/3/4/8/134888042/7213594.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/gupuso/lemutudinenizumufipuzes.pdfIn PDF document text
    • https://s3.amazonaws.com/tarizirefevifab/82947391544.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fdcbb9339856919c2930471/t/5fdceea8ddcc5d4b8439a839/1608314536646/76318838327.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fdd37885b7bc966055e0d98/t/5fddc625ef735726d24b03be/1608369702626/xexutitukupowos.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc509b1affbf90a660519c5/t/5fd023a71c49363a9b3fde11/1607476137253/elastic_car_sandbox.pdfIn PDF document text
    • https://s3.amazonaws.com/bojafazes/najazuruxawimorulibugabo.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fcdee90888ad70830b9c456/t/5fcf580f57846c5b83549b0a/1607424016174/79807769474.pdfIn PDF document text
    • https://s3.amazonaws.com/xisakazelelinim/water_cycle_information_in_gujarati.pdfIn PDF document text
    • https://s3.amazonaws.com/pujirageg/xoneropizagitaxufumofokub.pdfIn PDF document text
    • https://s3.amazonaws.com/genedesowul/nafa_2019_i_e.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_off0000c190.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC190 5400 bytes
SHA-256: c432f06103d267082c9e2d5429ba8d208b070b5aad531970468f8393348d55d9
font_01_sfnt_off0000d3dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3DC 10824 bytes
SHA-256: 18c12558b5ba419616426bf4d3d7726d243fa41742c3d9e0ab2b7a87336ffe66

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