Malicious PDF — malware analysis report

Static analysis result for SHA-256 936f01279be30eab…

MALICIOUS

PDF

45.3 KB Created: 2020-10-09 02:43:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 9e63c16b0e16bdfe4421277af8c01b37 SHA-1: 679f9c3e2f1a09e40ffb251af66310646b27d7c9 SHA-256: 936f01279be30eab41dc611c1f5a0465e2dc852d8376c1957362b0301a26c971
124 Risk Score

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 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://gettraff.ru/pify?keyword=fellowes+laminator+manual In PDF document text
    • http://wuroj.stephaniecarlo.com/uploads/1/3/2/3/132302987/2778808.pdfIn PDF document text
    • http://gofoteda.soloforsenate.com/uploads/1/3/0/9/130968917/kaxirewakituj-zuzeke-kelarapexu.pdfIn PDF document text
    • http://files.smartonlinebookkeeping.net/uploads/1/3/1/0/131071289/c3956e.pdfIn PDF document text
    • https://site-1036632.mozfiles.com/files/1036632/gedepogikevox.pdfIn PDF document text
    • https://site-1038660.mozfiles.com/files/1038660/95669912613.pdfIn PDF document text
    • https://site-1043215.mozfiles.com/files/1043215/86987897136.pdfIn PDF document text
    • https://site-1036659.mozfiles.com/files/1036659/42710970066.pdfIn PDF document text
    • https://site-1040244.mozfiles.com/files/1040244/walufubo.pdfIn PDF document text
    • https://site-1039290.mozfiles.com/files/1039290/newenodegowutu.pdfIn PDF document text
    • https://site-1039361.mozfiles.com/files/1039361/47294455107.pdfIn PDF document text
    • https://site-1040764.mozfiles.com/files/1040764/kopesirulifo.pdfIn PDF document text
    • https://site-1042674.mozfiles.com/files/1042674/70499814084.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/bcd2a2a8-c64d-4d69-8210-fee14b4e3184/pizenimawesenedefero.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/595a4f7f-d34c-42f6-ad48-ab2dcce6262b/zadosexuteba.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/53feaf68-f63c-4fe0-b6dd-a9006f740f67/86977472242.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8286cccb-7a5c-4997-b4fa-124111ec7211/widetilam.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_off00007463.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7463 4880 bytes
SHA-256: 1be291554387f16591a8b218075ccb5f9ff65a4f4c6eaf4c8ac923b78c9b416b
font_01_sfnt_off000084f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84F7 10284 bytes
SHA-256: 6c5bc84978053642445483d929dc7c533e3fe8d7262397de3b47811f4175124a