Malicious PDF — malware analysis report

Static analysis result for SHA-256 d32bb4fce4a59a40…

MALICIOUS

PDF

50.8 KB Created: 2020-09-29 10:11:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: b34d0e0fc128be448f8461331ae9fbbb SHA-1: b461467b2e55aa6d2f1aa4e73cefdfa8957defbf SHA-256: d32bb4fce4a59a406eab74d48692c8a066e7f5922f99d57e62e584dc3ac6e064
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • 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://ttraff.cc/pify?keyword=spanish+b+for+the+ib+diploma+teacher%2527s+resource+book+pdf In PDF document text
    • https://site-1037221.mozfiles.com/files/1037221/sodadusori.pdfIn PDF document text
    • https://site-1036851.mozfiles.com/files/1036851/wolemodiwum.pdfIn PDF document text
    • https://site-1036716.mozfiles.com/files/1036716/likebuburutenolidizerez.pdfIn PDF document text
    • https://site-1036862.mozfiles.com/files/1036862/bexupegagopomurasifagegik.pdfIn PDF document text
    • https://site-1037028.mozfiles.com/files/1037028/83585596985.pdfIn PDF document text
    • https://site-1037224.mozfiles.com/files/1037224/bugujolev.pdfIn PDF document text
    • https://site-1036946.mozfiles.com/files/1036946/45920895506.pdfIn PDF document text
    • http://files.milescollegenationalalumni.com/uploads/1/3/1/4/131483184/1393220.pdfIn PDF document text
    • http://goloma.nepcoawards.com/uploads/1/3/0/7/130775692/887794.pdfIn PDF document text
    • http://sudadub.futsalwithoutborders.org/uploads/1/3/0/8/130873822/b0ffec0db8fc.pdfIn PDF document text
    • http://files.sacredspacehealing.net/uploads/1/3/0/9/130968935/2c291fd52c8c026.pdfIn PDF document text
    • http://files.keyracquetball.com/uploads/1/3/0/7/130775092/falazusajoku.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://a0ecadb0-d02a-4f0b-a914-54d2579e862c.filesusr.com/ugd/7ad284_50e39044b53449388a137246aefff8f9.pdf?index=trueIn PDF document text
    • https://27b19fdc-98c1-4192-9952-b7a312cbd9f0.filesusr.com/ugd/e4a001_5ed951036931466791299518b673221e.pdf?index=trueIn PDF document text
    • https://c47c7257-7a1d-44c5-937b-35c282d605c0.filesusr.com/ugd/9d7ad9_542b74dea54742eb87cf9a1a64962b74.pdf?index=trueIn PDF document text
    • https://b6de536c-6f7c-4dfc-a839-3d0f7b4c2e8d.filesusr.com/ugd/007d40_793c0c91adf94519bfdd8a9972432202.pdf?index=trueIn PDF document text
    • https://650be135-e3bd-4ad0-add3-0620fecb0862.filesusr.com/ugd/909b15_99eea99c7b934ed1b5246520927bf364.pdf?index=trueIn 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_off00007a5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A5D 5736 bytes
SHA-256: 999b92e9fe990fe0cf84f2dd482feb3cfa6a77bbc54131fd4bb6c122f35d680c
font_01_sfnt_off00008db9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DB9 15312 bytes
SHA-256: 6665d0fc865a3a8f4877cd9ab510d3bab62f809bf7a4aa2c09e00da1164d2cf5

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