Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe9c893ae5f3dc58…

MALICIOUS

PDF

43.8 KB Created: 2020-10-06 21:27:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 8ab464c6fab9dd71a710be29be9d1107 SHA-1: a6e95d5293936d15f45a26fe3f9ee757aa58f5a5 SHA-256: fe9c893ae5f3dc581e2435c1943ab8f3cd9d98626e9db16aa719d44c75bf04f3
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://gettraff.ru/pify?keyword=solving+polynomial+equations+by+factoring+worksheet+answers In PDF document text
    • http://sukun.musiccitypetpartners.org/uploads/1/3/2/6/132682063/71fc9fc2e.pdfIn PDF document text
    • http://files.misobuildingptyltd.com/uploads/1/3/2/6/132695399/283c6529e301d.pdfIn PDF document text
    • http://files.forcebrewery.com/uploads/1/3/2/6/132695200/5bb2eb6533fe68d.pdfIn PDF document text
    • http://files.legaljj.com/uploads/1/3/0/9/130969755/siramadomulowex.pdfIn PDF document text
    • http://files.theafastudio.com/uploads/1/3/2/6/132696146/e7a44c9a9ba29.pdfIn PDF document text
    • http://files.softiehk.com/uploads/1/3/0/7/130739449/d8bb7572f19.pdfIn PDF document text
    • https://site-1039878.mozfiles.com/files/1039878/74373582822.pdfIn PDF document text
    • https://site-1040669.mozfiles.com/files/1040669/kipogumuwaweliwuxiz.pdfIn PDF document text
    • https://site-1036632.mozfiles.com/files/1036632/silakuru.pdfIn PDF document text
    • https://site-1037202.mozfiles.com/files/1037202/29862809883.pdfIn PDF document text
    • https://site-1039215.mozfiles.com/files/1039215/27705041880.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/e6d1ddb6-c2b6-4082-8d54-556db04a8f2c/voxobafajobelewiro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5622deb5-960b-44f9-929f-6d2630ceb72a/12040045908.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b742f0da-8d0c-4f0d-a6e8-f7b4ea5070b9/jejevawikifegef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ea66fb0-d9aa-4387-ab5c-38a613e12556/31307973139.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5af119ed-25b9-4e70-a43f-c8b26acd4b05/31782906245.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_off00006a03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A03 6116 bytes
SHA-256: 012cdbf8a57b2ab68df28c225b497cbde37d50e945eb9f95e287b617a64704f1
font_01_sfnt_off00007ec7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7EC7 10252 bytes
SHA-256: dd559195192a0a6f922fcf92f23985b6bab2566adcec31ac00fa888932e3529c

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