Malicious PDF — malware analysis report

Static analysis result for SHA-256 a033c28b1797bed8…

MALICIOUS

PDF

57.5 KB Created: 2020-11-05 02:48:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 4636f4d4f92bb640f3dcdb9ef14fd08a SHA-1: 1ee42a7ec350d0e55d7fd94c6a75a1ed0d233965 SHA-256: a033c28b1797bed832791547431464a39f633201c626a8fc225f5220d47ac47c
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to link farms and redirectors, indicating a phishing or scam attempt. The ML classifier strongly flagged this PDF as malicious, and the presence of multiple external links suggests an attempt to direct users to potentially harmful content. While no scripts were extracted, the PDF structure itself is designed to facilitate malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://ttraff.link/123?keyword=samurai+jack+wiki+jack In PDF document text
    • https://lirebuzufosol.weebly.com/uploads/1/3/1/4/131453665/liwujitod.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367937/normal_5f8a05f1f3759.pdfIn PDF document text
    • https://delimilakemasuj.weebly.com/uploads/1/3/4/4/134400920/tekixin.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383797/normal_5f8be92894e2c.pdfIn PDF document text
    • https://nikuwexipamojag.weebly.com/uploads/1/3/0/8/130813731/mivawarezin_pemupib_bimugozutudufib_kadesode.pdfIn PDF document text
    • https://wesujugureju.weebly.com/uploads/1/3/0/8/130874517/vojasu_dinitemadez_julevu_sejer.pdfIn PDF document text
    • https://zofomuwane.weebly.com/uploads/1/3/4/0/134040850/sisotesaxexugiw_joketevofigatav.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/zizene/vudoxag.pdfIn PDF document text
    • https://s3.amazonaws.com/gumegulaxi/brother_xl_2600i_user_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3ddf030-1cb5-4519-8658-7cf9c1ccb172/xoriradafilokojoxatopu.pdfIn PDF document text
    • https://s3.amazonaws.com/jifesu/womaxoteriwabuliladurogi.pdfIn PDF document text
    • https://s3.amazonaws.com/salade/741161065.pdfIn PDF document text
    • https://s3.amazonaws.com/wavunot/unger_bible_dictionary_online_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/84a69c98-c87f-4365-9b40-5b7214ac3e6f/22182257310.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008dbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DBC 5068 bytes
SHA-256: 7a41c78b6d8bd6bb3400449e643f2a72e741e5684427c6573b05c158e9c19282
font_01_sfnt_off00009efa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9EFA 10872 bytes
SHA-256: 55056e96fe53869c34644a238e60b99edae5e571e8b92f4fc3067d91bf599ce2
font_02_sfnt_off0000c406.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC406 16144 bytes
SHA-256: 18f56b7fae04e07bc119a468ad323bdda099da77b0772854d1c47cc1f39b9f3b

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