Malicious PDF — malware analysis report

Static analysis result for SHA-256 87f788cd83d4ce2a…

MALICIOUS

PDF

64.2 KB Created: 2021-02-13 01:39:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 98ca48f8ca167a3a02f9534b39a41747 SHA-1: bbb4c20a5faa97f6049164187d9d63f2b199ba66 SHA-256: 87f788cd83d4ce2a67c832dececaca881dfc6ec646cc1179fe4b0b3f81d04e39
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://bologen.ru/wix?keyword=question+mark+worksheet+grade+1 PDF link annotation
    • http://copyrightsupport-ig.com/nugofetu9rmvv.pdfIn PDF document text
    • https://wigizidipi.weebly.com/uploads/1/3/5/9/135984633/4676790.pdfIn PDF document text
    • https://cdn.sqhk.co/vaminika/geGjij7/best_100_free_dating_apps_2020.pdfIn PDF document text
    • http://muzhskoizhurnal.ru/25190471521vi1b9.pdfIn PDF document text
    • https://jukaregexiw.weebly.com/uploads/1/3/2/8/132816195/lupavinire.pdfIn PDF document text
    • http://nedaxavipotu.22web.org/21451073743.pdfIn PDF document text
    • http://centerbluebadge.com/81868366072aa527.pdfIn PDF document text
    • https://kunexiravirub.weebly.com/uploads/1/3/5/3/135344507/potupakaxefonev-kevasunuzesu.pdfIn PDF document text
    • https://nobarikanu.weebly.com/uploads/1/3/1/4/131483152/8b75e58082.pdfIn PDF document text
    • https://ginupegoforijef.weebly.com/uploads/1/3/4/7/134760486/pajikos.pdfIn PDF document text
    • http://storeyou.store/zanunumivifedakaxufupipkmbi.pdfIn PDF document text
    • https://kiwakobomu.weebly.com/uploads/1/3/1/4/131482833/2268576.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474727/normal_60123aa3767fb.pdfIn PDF document text
    • https://govodiroruje.weebly.com/uploads/1/3/0/7/130775462/zonujovu_soxijaguborex_zelike.pdfIn PDF document text
    • https://fefumuvujudadi.weebly.com/uploads/1/3/1/6/131606087/sidowu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kegunujav.epizy.com/85810364966.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_off0000bfb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBFB7 5476 bytes
SHA-256: cc14097756900a26328866302d5adab79847e048eaf7208002dea66f4557d026
font_01_sfnt_off0000d240.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD240 9992 bytes
SHA-256: 0c9777f34ff8639731e7cc20f32d9016be8ae5ecfbe2a5ee9ebfde5ee1db63e3