Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe663cb0548eed80…

MALICIOUS

PDF

82.0 KB Created: 2021-02-13 07:58:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: ed19d51dc94ceb551b87a6eac27fa72d SHA-1: 88488cdfcd054f13f2d2da9fca9dc82f4c80dc9c SHA-256: fe663cb0548eed80689b16f5bfbe132aaa6b93947efe0920591a39898977b087
246 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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://maypoin.ru/wb?keyword=load%20key%20authorized_keys%20invalid%20format PDF link annotation
    • https://sazizilas.weebly.com/uploads/1/3/0/8/130874530/xakikisol.pdfIn PDF document text
    • https://cdn.sqhk.co/tamoravuwera/bhjjfid/ncert_solutions_for_class_7th_science_chapter_10.pdfIn PDF document text
    • https://cdn.sqhk.co/vilomikov/ibhjdM5/18466320428.pdfIn PDF document text
    • http://pedurovizosika.22web.org/cpc_practice_exam_with_answers.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384037/normal_5ff15a0d4721f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417305/normal_5ff846a89a83a.pdfIn PDF document text
    • https://cdn.sqhk.co/zedawuzijis/hjvNhhi/santorini_wallpaper_iphone_x.pdfIn PDF document text
    • https://cdn.sqhk.co/fumamimed/pIiv2if/wibanilerugubokalor.pdfIn PDF document text
    • https://cdn.sqhk.co/sivefuxonix/hcqhjcI/airbnb_customer_service_california.pdfIn PDF document text
    • https://cdn.sqhk.co/bagadogod/Lvfhejg/wowuboxukavokoparo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481285/normal_5fff187e3d94d.pdfIn PDF document text
    • https://cdn.sqhk.co/mexovaru/MnvhgV9/vista_golf_miramar_links.pdfIn PDF document text
    • https://baponejivo.weebly.com/uploads/1/3/5/9/135986917/8e5ae48ef94561.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nepanazunisemi.epizy.com/kakulikoduwikoxobete.pdfIn PDF document text
    • http://sawopigemon.epizy.com/18442196811.pdfIn PDF document text
    • http://vimitafukufes.rf.gd/4416928342.pdfIn PDF document text
    • https://s3.amazonaws.com/kagedatabujo/word_association_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/pozokimepe/anodized_aluminum_sheet_4x8.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_off0000ff0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF0A 5392 bytes
SHA-256: a7ab35225761be15cbfc3dba6f3f039475a0c5dd2913ddaccc540ff6a95ee374
font_01_sfnt_off00011165.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11165 12744 bytes
SHA-256: d81025d41bb1b94753857699126abf28f0af25cadb061214849c2802e0f88abf

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