Malicious PDF — malware analysis report

Static analysis result for SHA-256 640e338fb95b0afb…

MALICIOUS

PDF

51.7 KB Created: 2020-10-15 22:28:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 9cdbf72295ce14f5f3ccdf1dc2d507b6 SHA-1: 6627cf2d859f0606183715d39a632c4edb046170 SHA-256: 640e338fb95b0afb6d565f43f6347dd7652e8481c595ac01e5c935651dda7411
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/123?keyword=acc+aha+guidelines+anticoagulation+atrial+fibrillation In PDF document text
    • https://site-1042020.mozfiles.com/files/1042020/jabakajuz.pdfIn PDF document text
    • https://site-1040995.mozfiles.com/files/1040995/chapter_21_absolute_monarchs_in_europe.pdfIn PDF document text
    • https://site-1040096.mozfiles.com/files/1040096/vpn_master_free_unlimited_proxy_apk.pdfIn PDF document text
    • https://site-1042014.mozfiles.com/files/1042014/balancing_equations_practice_worksheet_answer_key.pdfIn PDF document text
    • https://polabufasol.weebly.com/uploads/1/3/2/8/132814050/monavivepitenogow.pdfIn PDF document text
    • https://fodezamu.weebly.com/uploads/1/3/1/4/131407453/e9ff54.pdfIn PDF document text
    • https://jatorogerujew.weebly.com/uploads/1/3/2/7/132710569/5650151.pdfIn PDF document text
    • https://nudojafobedem.weebly.com/uploads/1/3/1/3/131379550/7240363.pdfIn PDF document text
    • https://bewupoterefi.weebly.com/uploads/1/3/1/3/131380107/gisopinur.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/915431.pdfIn PDF document text
    • https://pevugubak.weebly.com/uploads/1/3/2/7/132740457/7271212.pdfIn PDF document text
    • https://rewemekekebaz.weebly.com/uploads/1/3/1/4/131406535/xizisamej_lusuzupe_tuzid_tejuzosobu.pdfIn PDF document text
    • https://keniwuki.weebly.com/uploads/1/3/1/4/131483234/vaxukekiwurefebe.pdfIn PDF document text
    • https://lodirunesu.weebly.com/uploads/1/3/0/8/130874391/zesukufodak.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366032/normal_5f874440279bc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365634/normal_5f8701147343b.pdfIn PDF document text
    • https://mogilifus.weebly.com/uploads/1/3/0/7/130739831/9b53ec72f.pdfIn PDF document text
    • https://xawuwotogot.weebly.com/uploads/1/3/2/6/132695388/xowadi.pdfIn PDF document text
    • https://jowodetuleguzu.weebly.com/uploads/1/3/1/8/131856173/01f03d53f0.pdfIn PDF document text
    • https://dimaxafazeza.weebly.com/uploads/1/3/1/4/131453031/8767144.pdfIn PDF document text
    • https://vibebivenef.weebly.com/uploads/1/3/1/4/131412032/8366742.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/c9f240da-9c00-44b9-93d8-f451a1beebc1/13873756137.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ec1b48c-fa3d-4439-aa03-486cd431e83a/36106093913.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f70d50b2-6e21-4856-9942-ba822c055e6b/fivomuzogagugenim.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007e83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E83 5292 bytes
SHA-256: 548dfb5754b0c49eb7818935c8864954731cb03d9bf9447e2c56fd266bca3b75
font_01_sfnt_off00009068.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9068 9976 bytes
SHA-256: a5eae232f9544b5f4dc4d90b6a6b557be841a9098837146ef3bf52500eddf1ef
font_02_sfnt_off0000b275.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB275 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176