Malicious PDF — malware analysis report

Static analysis result for SHA-256 a32283e7fef05446…

MALICIOUS

PDF

46.8 KB Created: 2020-10-03 01:02:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 5478d1532c5e9f28d555c17f79aad413 SHA-1: ac262ce6332180a98ae54b83597cdec7911de46c SHA-256: a32283e7fef05446c6c286929ba74d133431cd838b1114c021ba0060c36020e0
224 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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://cctraff.ru/strik?keyword=cucm+8.+5+bootable+iso In PDF document text
    • http://files.pjmventures.com/uploads/1/3/1/3/131380107/kozuvidi.pdfIn PDF document text
    • http://ravek.spanishconversation.net/uploads/1/3/0/9/130970023/5845249.pdfIn PDF document text
    • http://files.garyfrymusic.com/uploads/1/3/0/7/130776104/784af233.pdfIn PDF document text
    • http://gavisaf.madmaxjerky.com/uploads/1/3/1/3/131380600/jabetajokiwefa.pdfIn PDF document text
    • http://fiwitibok.shindigpublishing.com/uploads/1/3/0/7/130775388/1906585.pdfIn PDF document text
    • https://site-1036926.mozfiles.com/files/1036926/88087376382.pdfIn PDF document text
    • https://site-1039564.mozfiles.com/files/1039564/31471166153.pdfIn PDF document text
    • https://site-1036980.mozfiles.com/files/1036980/45224370540.pdfIn PDF document text
    • https://site-1037054.mozfiles.com/files/1037054/binadagolovi.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/9c14a627-4c07-4a7c-85a4-1b3f3543da0f/tabiriwepezuxu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71af3a9c-61d2-46b7-879d-eee03c5e6bdc/lepafejaxebubazatuviv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b778892c-ccd7-457f-a24b-53bba819f09b/laluma.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7397/9043/files/63255467444.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8716/7645/files/84607889092.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6387/8566/files/96981233606.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/9357/6868/files/79853151532.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_off000071f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71F8 5244 bytes
SHA-256: d2fa64c5653ce45dd7340f2b8b01e3e1a6b124c69e33a444f2f8a80a1512a4a5
font_01_sfnt_off000083c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83C8 13720 bytes
SHA-256: aad8848e521c175a4adb4d6581d7438ab4acec9ba2f61b2e543e1225bd1e6416

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