Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b6c90edb1a4f091…

MALICIOUS

PDF

72.6 KB Created: 2021-02-21 21:42:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 2ce0a1b4402e3e9dcd06e4f790a9ac13 SHA-1: 614771ac34dd92b96c8a2e9e90a1e253f4e408f4 SHA-256: 9b6c90edb1a4f091871a4e5ad8f02f3329afc438198631885fb91946c36b2353
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs, many pointing to disposable hosting services, indicative of a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are consistent with techniques used to deliver malicious content or redirect to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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://crophysi.ru/wix?keyword=magic+pot+ff12 PDF link annotation
    • https://burekanokem.weebly.com/uploads/1/3/1/0/131069897/fipovepijapo.pdfIn PDF document text
    • https://subolamamojoga.weebly.com/uploads/1/3/4/7/134719430/9c67bb35.pdfIn PDF document text
    • https://menuzuxa.weebly.com/uploads/1/3/1/0/131070619/776304.pdfIn PDF document text
    • http://lg-supportteam.com/helloween_if_i_could_fly_piano_sheetev2dh.pdfIn PDF document text
    • https://zuzedunili.weebly.com/uploads/1/3/4/4/134460484/pixigi.pdfIn PDF document text
    • http://pribor-poverka.site/black_wolf_hd_pictures_downloaddxg27.pdfIn PDF document text
    • https://bimevaxufozuz.weebly.com/uploads/1/3/2/6/132683359/xaxuwabusomu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388426/normal_5fe1b89b2ffb6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386330/normal_602c3da3545da.pdfIn PDF document text
    • https://jotudopu.weebly.com/uploads/1/3/5/3/135316217/lunixuxoxamaxatu.pdfIn PDF document text
    • https://sivipafegedijog.weebly.com/uploads/1/3/4/4/134443607/5593881.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/lorugipopuxe/bestand_verkleinen.pdfIn PDF document text
    • https://s3.amazonaws.com/somamere/bidir.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e079.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE079 5064 bytes
SHA-256: 13c5dd38cd98d84544e032d812b4acb06fa3dbebd35d278fbcc9e7cedfe281a3
font_01_sfnt_off0000f1ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1ED 10472 bytes
SHA-256: bcbff1c73912000efc29032db444a6f6eaaca18eb375b0a15330cb960a4d25a6

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