Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f78f3a166a70191…

MALICIOUS

PDF

42.1 KB Created: 2020-10-19 03:43:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: a8ccd13f1ac61fe79e216b516720712b SHA-1: 19015ab43201c6c7ba60df4a294da74892b616c7 SHA-256: 7f78f3a166a701913640c202c292eeb77969f1720243e85f7fca2dc37e06e4f2
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://cctraff.ru/strik?keyword=study+guide+13+accounting+answers In PDF document text
    • https://jufaxexave.weebly.com/uploads/1/3/0/7/130775513/8a98ea80e.pdfIn PDF document text
    • https://zegojipoxe.weebly.com/uploads/1/3/1/0/131069766/55ce0e8f33ec.pdfIn PDF document text
    • https://vopevejefed.weebly.com/uploads/1/3/1/6/131606133/789683.pdfIn PDF document text
    • https://vatipasa.weebly.com/uploads/1/3/0/7/130775610/4841499.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365627/normal_5f86fc24db4ba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372073/normal_5f8b32e81df50.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367019/normal_5f8834f4c07bf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373797/normal_5f8a0ffc27ca2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374374/normal_5f89ad3729e52.pdfIn PDF document text
    • https://tevirilozarenov.weebly.com/uploads/1/3/2/6/132695732/679176.pdfIn PDF document text
    • https://narogigadi.weebly.com/uploads/1/3/0/8/130874066/c2099e721b.pdfIn PDF document text
    • https://desaviguwogo.weebly.com/uploads/1/3/1/8/131871994/1989684.pdfIn PDF document text
    • https://misopiwulasi.weebly.com/uploads/1/3/1/8/131856666/vixuluwanijojabiguko.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/773d2e30-cb71-4477-b252-0c29f6bc67cc/sefuzozasubemufiboxu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b47a7416-ccad-4cbe-8056-82182e5fb566/fagesuvesikazuxelowopuwa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/2976/9639/files/spay_and_neuter_clinic_penn_hills_pennsylvania.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0488/4080/2469/files/gunship_battle_mod_apk_download_latest.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/9388/3557/files/individual_vs_society_romeo_and_juliet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9100/8418/files/historia_y_evolucion_de_la_psicologia_general.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0488/4080/2469/files/14663447372.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_off00006453.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6453 5588 bytes
SHA-256: 94c20d4b83f13fcf45738748c5905e461aa241ed8373d784501a544af44c8fbb
font_01_sfnt_off0000777f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x777F 10436 bytes
SHA-256: 5f8fed491426ea3ee0b1dca9215a446c3568a8275a5319f77460350f54e65fb6

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