Malicious PDF — malware analysis report

Static analysis result for SHA-256 72f6756839d3acad…

MALICIOUS

PDF

68.0 KB Created: 2020-10-16 23:23:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 847c301cfb2f028204a8de22fd10a6c4 SHA-1: a5ba6b74619dc0fb903504484b7bf3762a73ed0b SHA-256: 72f6756839d3acada4b7c3fe0e6296c9e785c787e7cc052169e720bbe06446ea
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.link/123?keyword=noun+phrase+complexity+in+english+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4368504/normal_5f8786f16be27.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365624/normal_5f871e84f1e2e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367905/normal_5f8756a700e71.pdfIn PDF document text
    • https://xawuwotogot.weebly.com/uploads/1/3/2/6/132695388/fufuvewejubut_kubonivosonew.pdfIn PDF document text
    • https://jiwepurojal.weebly.com/uploads/1/3/0/7/130775762/wekovoromexuwit.pdfIn PDF document text
    • https://risimukino.weebly.com/uploads/1/3/1/3/131383953/nibenesiw_pifezepedim_jozusafumupup_delilavokag.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/4056517.pdfIn PDF document text
    • https://keniwuki.weebly.com/uploads/1/3/1/4/131483234/5acab582ad41.pdfIn PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/pejajofedaxevaw_kozadesupuke.pdfIn PDF document text
    • https://dojulukasinu.weebly.com/uploads/1/3/0/7/130776790/2d658bc19458.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/d6bc1369-6c0e-4ffc-9ec0-c7bf97b6ab54/kexawiduzozibapupedu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4130db2e-581d-4f42-b093-bf59f46ba73b/45801353504.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f804c946-61de-45dd-a24a-eb5c9a803db3/pasubotijuwumaxifitoja.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ad35f6b-4c20-4541-93aa-99a82ee833c8/nakirepuxetatokuvalogod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/364733d0-0071-4cb7-b37d-87033a6abd47/40653565561.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e545e62b-40a1-4527-a15f-82544454930b/wesuxolix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a98a91d-821b-4f6a-bbcd-14af8b19575c/46748101087.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/06bcb372-fb78-4cfa-b31a-4a2f54fa88c7/10942515549.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a70af9cc-ccd0-4e49-89e4-c94b56388d9e/givapog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72eb4ccc-c061-4654-af20-e2c9e9b2f302/vanaxiwemeviketev.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_off0000cae7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAE7 5708 bytes
SHA-256: 530748e0385716d5512e3a6f5cd7d8507073529b6ecf5eaadc60b32abf99beb3
font_01_sfnt_off0000de30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE30 10656 bytes
SHA-256: 629f80d89ea1d8c9d3c6a02fcd2613db4c770b79ac847c8478a0e011120cfd7e

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