Malicious PDF — malware analysis report

Static analysis result for SHA-256 09dbf5dcdf08f875…

MALICIOUS

PDF

72.7 KB Created: 2021-03-03 16:26:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: d7964c622cb820fbf576f14fe0bd1c19 SHA-1: fff964f0c607004eacf6b04ffb7e98120067f3eb SHA-256: 09dbf5dcdf08f87504bd8d1dbd27ce1264cbdb464ee75b1b3654aecdb7d7bb53
246 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://filinisosiwox.weebly.com/uploads/1/3/0/8/130814007/9127019.pdf.
  • 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://nipisod.ru/award?keyword=how+to+reset+firestick+remote+first+generation PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4379837/normal_600e70eed9c56.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416921/normal_6018765f360b6.pdfIn PDF document text
    • http://infonewsuk.site/google_play_store_app_review_guidelinesixw8t.pdfIn PDF document text
    • https://filinisosiwox.weebly.com/uploads/1/3/0/8/130814007/9127019.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371005/normal_5ff45f0c145a9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476782/normal_6036157f31b2b.pdfIn PDF document text
    • http://fbcopyright-center.com/91272854491g5f79.pdfIn PDF document text
    • https://favasonod.weebly.com/uploads/1/3/2/7/132740296/sedet_pasebepogi_zuliwutun_kokilajag.pdfIn PDF document text
    • https://cdn.sqhk.co/rukokota/jbVgchd/39151628426.pdfIn PDF document text
    • https://kopezufotixese.weebly.com/uploads/1/3/1/1/131164020/6aead.pdfIn PDF document text
    • http://helpverifedbadges.com/primo_bottom_loading_hot_cold_water_dispenser_manual0l9r1.pdfIn PDF document text
    • https://cdn.sqhk.co/nejisakatok/ChbChjR/87748947527.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425504/normal_5fed5cbd326c8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465949/normal_5fd37979d6e69.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405642/normal_600cbce8e287a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404727/normal_5fdfb984c8c6d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466165/normal_5fd95f6872a74.pdfIn PDF document text
    • http://boldly-grow.com/photoshop_cs4_animation_tutorialk091h.pdfIn PDF document text
    • https://cdn.sqhk.co/woguwubege/jffMAFu/golden_globe_nielsen_ratings_2019.pdfIn PDF document text
    • https://samukolapupe.weebly.com/uploads/1/3/4/0/134017142/xilumumikasube.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000e039.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE039 5284 bytes
SHA-256: 72e50501219cba06ca1ffc03cdbc1331030ed2a3e500e74e347014acf8ce55ff
font_01_sfnt_off0000f232.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF232 10360 bytes
SHA-256: 47c1ccac018e6c2c1d059e1dcaf904f231a9b8ba6a1f2ef15863460400fdeb62