Malicious PDF — malware analysis report

Static analysis result for SHA-256 723262900acdd162…

MALICIOUS

PDF

41.4 KB Created: 2020-10-12 12:05:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: ed7979922676fd9580bc8f07108b549d SHA-1: 71be5b3d0e1a970162223dd561deff7a28436923 SHA-256: 723262900acdd16274fcccbf735c5676603005fe419f4339e17cd793a4217e3e
124 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to known malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains text suggesting it is a Maserati owner's manual, likely a lure to encourage clicks. The ML classifier also strongly flagged this PDF as malicious.

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=maserati+quattroporte+2020+owners+manual In PDF document text
    • http://files.katedacy.com/uploads/1/3/1/3/131398036/e6dc6b08fc7db.pdfIn PDF document text
    • http://files.hatorishoten-articles.com/uploads/1/3/2/6/132683014/papufabarefe.pdfIn PDF document text
    • http://files.braverybox.com/uploads/1/3/0/7/130740316/wuzek.pdfIn PDF document text
    • http://xoxedet.matthewkalliman.com/uploads/1/3/2/7/132712324/fa8809bcce.pdfIn PDF document text
    • http://files.reconnect2self.com/uploads/1/3/1/3/131398231/90a43.pdfIn PDF document text
    • https://site-1039702.mozfiles.com/files/1039702/vavotu.pdfIn PDF document text
    • https://site-1041852.mozfiles.com/files/1041852/juvorozemugunazotena.pdfIn PDF document text
    • https://site-1043456.mozfiles.com/files/1043456/kenopim.pdfIn PDF document text
    • https://site-1042733.mozfiles.com/files/1042733/pizemokumurif.pdfIn PDF document text
    • https://site-1039632.mozfiles.com/files/1039632/pomugutibivule.pdfIn PDF document text
    • https://site-1037205.mozfiles.com/files/1037205/netisurumav.pdfIn PDF document text
    • https://site-1039703.mozfiles.com/files/1039703/litemexoruxi.pdfIn PDF document text
    • https://site-1037124.mozfiles.com/files/1037124/21273420165.pdfIn PDF document text
    • https://site-1037096.mozfiles.com/files/1037096/lategilasisigaxoro.pdfIn PDF document text
    • https://site-1041864.mozfiles.com/files/1041864/38954337831.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off000060b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60B6 5464 bytes
SHA-256: 45b605a1764205ff3667e466a2b6fdef02aae975e1e9816887f3d8ac223d5ed1
font_01_sfnt_off00007349.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7349 11136 bytes
SHA-256: 7c9af465a85588519d617deb3d395d6bdb34bc0dfd1525188de66fb6a580a2c5

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