Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f9de391ab306029…

MALICIOUS

PDF

73.6 KB Created: 2021-02-16 17:37:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 0abd7299a4e25894f20949b307e540c3 SHA-1: 8975b8ebb9013fe05b7ce59c75af237d58911160 SHA-256: 1f9de391ab306029f7a2282ba1347c1409fc7ea0380c5aa42db48aae374cb9f4
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document contains numerous embedded URLs pointing to disposable domains and link farms, suggesting it is designed to redirect users to potentially harmful websites. The presence of external URIs and the 'link farm' heuristic strongly support a phishing or malware distribution attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://bologen.ru/wix?keyword=excess+reactant+formula PDF link annotation
    • http://llloooodddd.space/las_vegas_casino_chips_guidekm3mj.pdfIn PDF document text
    • https://zetitazafoxiz.weebly.com/uploads/1/3/4/0/134040412/dopepebugu.pdfIn PDF document text
    • http://myyshooop227.site/warcraft_adventures_lord_of_clans_walkthroughcq3nf.pdfIn PDF document text
    • https://ludabasekid.weebly.com/uploads/1/3/2/7/132740342/9993129.pdfIn PDF document text
    • http://govnososal.xyz/rimemawavupibitcrbz.pdfIn PDF document text
    • http://cmb-accueil.com/138116795118jxix.pdfIn PDF document text
    • https://vojonabof.weebly.com/uploads/1/3/1/3/131383251/3245926.pdfIn PDF document text
    • http://help-verification.com/95582442486y1hv1.pdfIn PDF document text
    • http://loveantravel.xyz/cash_loan_agreement_template7cbso.pdfIn PDF document text
    • https://cdn.sqhk.co/bawusipa/gcghjhL/freak_sound_effect.pdfIn PDF document text
    • http://lnstagrambusiness.com/63688599311ifvg2.pdfIn PDF document text
    • https://kobokudebixisog.weebly.com/uploads/1/3/5/3/135390699/pusuzorokazenulimofu.pdfIn PDF document text
    • http://lazerepil.site/289546104503ycpp.pdfIn PDF document text
    • https://guditeni.weebly.com/uploads/1/3/4/5/134529862/8183371.pdfIn PDF document text
    • http://maturibcgj.space/libro_de_trigonometriaw9ztf.pdfIn PDF document text
    • https://cdn.sqhk.co/xawemubimaj/jcgjKqt/receita_de_glace_real_para_bolo_de_noiva.pdfIn PDF document text
    • http://startask.ru/45005831705mbhv6.pdfIn PDF document text
    • http://price-list.moscow/85375816890o5jc2.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_off0000e340.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE340 5052 bytes
SHA-256: 6b12680fc72185ec85c04eba2722182e667d4d8254e2addf4d6a4e58c2e94e43
font_01_sfnt_off0000f463.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF463 10772 bytes
SHA-256: a5d19464fc943babe5c61bde5a901f98da148a39e1cc633bd742db82762b6394

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