Malicious PDF — malware analysis report

Static analysis result for SHA-256 235ff83dd6ee0d6a…

MALICIOUS

PDF

70.5 KB Created: 2021-02-14 16:42:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 8d2768073ffd9e7058d13e13d0bd8c0b SHA-1: c6d17b6c5393b00bd120feaf08f8d6a7b99111f8 SHA-256: 235ff83dd6ee0d6ac7aab25da51e423876605c09fd67292ca236a2bfd92d5977
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://yafferge.ru/wix?keyword=algona+high+school+baseball In PDF document text
    • http://montana-media.com/buy_real_twitter_followers_that_retweetzgwy4.pdfIn PDF document text
    • http://my-credit.info/706283202597hzlp.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470521/normal_5fec0abfde052.pdfIn PDF document text
    • https://cdn.sqhk.co/jamolipa/fijugji/bugogemat.pdfIn PDF document text
    • http://pipvip.ru/fawiteliwuzafimele1k5c.pdfIn PDF document text
    • https://cdn.sqhk.co/panafilaputu/vhfJjcQ/simple_birthday_decoration_ideas_for_boyfriend.pdfIn PDF document text
    • https://cdn.sqhk.co/tesigasefaxe/id0ggge/39269438113.pdfIn PDF document text
    • http://vzale.ru/55271013903khm7.pdfIn PDF document text
    • http://libertinemodels.com/403823017867j337.pdfIn PDF document text
    • https://cdn.sqhk.co/zojixemem/gfje1CD/55766213249.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393208/normal_5ff062ec6c898.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483365/normal_5ff1de3216478.pdfIn PDF document text
    • https://cdn.sqhk.co/pasededi/hmEYl4v/5056315848.pdfIn PDF document text
    • http://bnl-jobs.com/comparing_linear_functions_worksheet_algebra_1yub9i.pdfIn PDF document text
    • https://cdn.sqhk.co/zogobadakedu/fifVjaK/kiwebulabijuxevoniwaven.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_off0000cc6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC6E 4804 bytes
SHA-256: 8e42fcebccbc2772516c4d9514197c0ab6bac53e2f2f0665ed3ad013feec02db
font_01_sfnt_off0000dca9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCA9 10008 bytes
SHA-256: 63421940778b82062410c31b232750a08b9c5ec643728b2f01a4fc06186b5c11
font_02_sfnt_off0000fef3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEF3 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176