Malicious PDF — malware analysis report

Static analysis result for SHA-256 20cc6e5d82a2a356…

MALICIOUS

PDF

76.3 KB Created: 2021-03-30 00:27:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 93003d2ef7e6821e7fe74ec2eb73e903 SHA-1: 227147630ab4f8097f80641fb2c9e62b786fe63a SHA-256: 20cc6e5d82a2a35628b9e29ab9e4349001cdc77f7bc9ee768e6685eb5853fbac
194 Risk Score

Malware Insights

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

This PDF document exhibits characteristics of a link farm, containing numerous external URLs pointing to other PDF files. The presence of a 'Download' button lure and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful content. The ClamAV detection further confirms its malicious nature, classifying it as Pdf.Phishing.Trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://druttle.ru/wix?keyword=baseball+9+mod+apk PDF link annotation
    • https://cdn.sqhk.co/bulunazi/hUr7vhf/5443197217.pdfIn PDF document text
    • https://cdn.sqhk.co/kuwusemob/qCyRcJP/fdic_call_report_glossary.pdfIn PDF document text
    • http://sq11mini.com/budget_approval_form_templatedxs4o.pdfIn PDF document text
    • https://zikepasut.weebly.com/uploads/1/3/4/1/134108801/8613241.pdfIn PDF document text
    • https://cdn.sqhk.co/jezaziritav/JSiaifZ/zafolixukukulope.pdfIn PDF document text
    • https://cdn.sqhk.co/titolegun/ohe4hgg/mikefuvujaruful.pdfIn PDF document text
    • https://cdn.sqhk.co/lebapivi/Ivjavag/34594943100.pdfIn PDF document text
    • https://xaforegitada.weebly.com/uploads/1/3/1/4/131413040/9765093.pdfIn PDF document text
    • https://cdn.sqhk.co/tevunufoba/hxTjgjf/monopoly_bingo_cheat_codes.pdfIn PDF document text
    • http://hookup154.fun/25929068803ubgql.pdfIn PDF document text
    • https://bujozimadepaxed.weebly.com/uploads/1/3/4/6/134615651/5934272.pdfIn PDF document text
    • http://netewe5.xyz/49890471432k924f.pdfIn PDF document text
    • https://cdn.sqhk.co/futevanu/Dhigihf/sejebigew.pdfIn PDF document text
    • https://cdn.sqhk.co/jevipugirofi/pihgfhi/gameboy_micro_gamestop.pdfIn PDF document text
    • http://katermore.ru/vogikukoxmn5p.pdfIn PDF document text
    • https://cdn.sqhk.co/letinumi/CgidA2n/10038022135.pdfIn PDF document text
    • http://zilamuro.medianewsonline.com/67560516404.pdfIn PDF document text
    • http://tokio-2020.fun/como_quitar_una_linea_negra_en_la_uaxzkvh.pdfIn PDF document text
    • https://cdn.sqhk.co/nexetifosam/idahhie/bella_vista_golf_course_tee_times.pdfIn PDF document text
    • https://cdn.sqhk.co/duxadikoti/1hdxhg8/dobexuxoxagunirikarakafa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dasobiviwadodaj.atwebpages.com/how_to_fix_newsfeed_on_facebook_app_iphone.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_off0000ed8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED8B 5416 bytes
SHA-256: 16bc1e82085d27ca54db9be4b591e8d50d4958fe16a1dfd027be56b3bc385acc
font_01_sfnt_off0000ffdd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFDD 10552 bytes
SHA-256: 973b76580152993d627698d7591478344db0285c2fa97dcf804348052142e049

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