Malicious PDF — malware analysis report

Static analysis result for SHA-256 345b6dcaa56b32f3…

MALICIOUS

PDF

72.8 KB Created: 2021-02-25 03:44:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 6f47b65d6f564aaea7c02b1986b9f900 SHA-1: c04a7540d328b81644dc3e39fdf3a6c52f685d87 SHA-256: 345b6dcaa56b32f39c7bfcf50cc30f8c2aec690716436ee404e8fa374f23a0c7
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 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://crophysi.ru/award?keyword=intex+sand+filter+pump+instructions In PDF document text
    • http://salet.store/terekijizajakomozedao49nj.pdfIn PDF document text
    • http://jushq.pro/behringer_eurorack_ub2442fx-pro_ebay9opej.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416151/normal_5ff5dc322ac68.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369491/normal_5fe686acbe9f9.pdfIn PDF document text
    • https://fowuwulavo.weebly.com/uploads/1/3/4/7/134754099/858e580.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464527/normal_6008ae57b1377.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462073/normal_602c087a9f63b.pdfIn PDF document text
    • http://spainwow.pro/nufejutazamybyt5.pdfIn PDF document text
    • https://wuxavuzipirugud.weebly.com/uploads/1/3/4/0/134012349/tinobir.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486200/normal_5ff47236d1e3a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463788/normal_60340ccacf6ff.pdfIn PDF document text
    • https://jasesagovog.weebly.com/uploads/1/3/4/6/134619134/8a16a5c1.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
    • 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_off0000d47d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD47D 5188 bytes
SHA-256: 02e71dc3fb0b78b22d767c21e7880eb18463487cf0bb40df7f0f0317165cecf8
font_01_sfnt_off0000e603.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE603 9892 bytes
SHA-256: 47d5555c88bfecdbbd7ca042047d9cc0fe78fde093b4778710d3747ff334e378
font_02_sfnt_off000107ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107ED 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361