Malicious PDF — malware analysis report

Static analysis result for SHA-256 76fcfa138c3b29f1…

MALICIOUS

PDF

76.8 KB Created: 2021-02-15 07:53:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 36e109ea69903bed3b6b520bbb6bb55e SHA-1: 77e70b11b8420d35a5cf2aabd678fc53bcc1b59c SHA-256: 76fcfa138c3b29f16f9b53cc4372577ab833856763c15c20f00c1e4fbc3b32eb
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://crophysi.ru/wix?keyword=fire+mephit+pathfinder In PDF document text
    • http://lnstagramverifiedbadge-form.com/company_letterhead_free2btkh.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414172/normal_6010cbeeb72ef.pdfIn PDF document text
    • https://romugazasemagop.weebly.com/uploads/1/3/4/8/134897733/4351008.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393772/normal_6008e82999363.pdfIn PDF document text
    • http://guxiket.iblogger.org/73205349769.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368221/normal_5fe02d313fd31.pdfIn PDF document text
    • https://sovajavab.weebly.com/uploads/1/3/4/0/134041947/juwuvoxeper.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462974/normal_5feb9cc928c78.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379837/normal_601e03e630634.pdfIn PDF document text
    • http://ihsteam.ru/mestrenova_download_previous_versionlti1m.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://niwuzij.rf.gd/sesanoxa.pdfIn PDF document text
    • http://nuwaxavujiw.rf.gd/fubepesil.pdfIn PDF document text
    • http://gafelen.epizy.com/girlfriends_guide_to_divorce_cast_ages.pdfIn PDF document text
    • https://s3.amazonaws.com/piwanisaj/street_fighter_4_arena_mod_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/vunizi/scatterbrain_jeff_beck_sheet_music.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_off0000f18f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF18F 5024 bytes
SHA-256: e8f833d2fbc788dc005f7dc35d6423aa7bfc997c868197e27d0b084159a63834
font_01_sfnt_off0001027d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1027D 10544 bytes
SHA-256: 0fd4b6f7ada4e64724ce24b435abda91fbd4f1b33c70f620873310d6e158c152