Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d48c8c9ded7e118…

MALICIOUS

PDF

62.6 KB Created: 2021-02-20 14:30:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 026c623c042f56041cb8310cad1e6796 SHA-1: c6220ba8434e972322aa67c91669c724b31d012b SHA-256: 3d48c8c9ded7e118bbfe36b7b9f899c9dd543c3af03748c32bb5a9e04198cc01
184 Risk Score

Malware Insights

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

This PDF document contains numerous embedded links, many of which point to disposable hosting or known malicious redirectors. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded links are designed to redirect users to potentially harmful sites, as evidenced by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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/wb?keyword=char%20griller%20pellet%20smoker%20parts In PDF document text
    • https://vubenazago.weebly.com/uploads/1/3/4/3/134357699/towejopin.pdfIn PDF document text
    • https://banatili.weebly.com/uploads/1/3/5/3/135314160/31957b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489992/normal_5fe05b9d782ad.pdfIn PDF document text
    • https://furamakivagoj.weebly.com/uploads/1/3/0/8/130814247/b7e154973f80.pdfIn PDF document text
    • https://lumixomenuvaw.weebly.com/uploads/1/3/4/7/134745504/bcf45f99189.pdfIn PDF document text
    • https://wibugosavuzatug.weebly.com/uploads/1/3/4/3/134349607/fobanoxesa.pdfIn PDF document text
    • https://zuzesewijolane.weebly.com/uploads/1/3/1/4/131406438/95f2ad8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486772/normal_6023f624b37b7.pdfIn PDF document text
    • https://nunibuzobaga.weebly.com/uploads/1/3/0/7/130740367/eb51b19c.pdfIn PDF document text
    • http://onatural.space/pixel_art_coloring_relaxing_color_by_number_apkk09fl.pdfIn PDF document text
    • http://rawenspant.online/is_there_a_new_tiger_king_episode_on_netflixan7bs.pdfIn PDF document text
    • https://tidemipevu.weebly.com/uploads/1/3/0/7/130740592/b7a6f.pdfIn PDF document text
    • https://zunepijubu.weebly.com/uploads/1/3/3/9/133986973/37510ae6.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/fizup/pay_slip_template_australia.pdfIn PDF document text
    • https://s3.amazonaws.com/pisik/12935781940.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_off0000b850.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB850 5204 bytes
SHA-256: d942d455a25a7d62600cca7c04dcda1414ed849f3c5cca0d75376419bb470172
font_01_sfnt_off0000c9d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9D2 10516 bytes
SHA-256: a7e15fa9a4afd725b2d355354434d6c538bf8b7a2a71ff957c8b4046f869ade2

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