Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ee0f067398e9c51…

MALICIOUS

PDF

91.0 KB Created: 2021-03-23 15:17:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: d64f3e70f203126ad4e4ddf608555ffe SHA-1: 1a0d73dcff4cadae4d465ae575085175339cd509 SHA-256: 3ee0f067398e9c515ea01d54fe7d4886711bd27dc660bbe18bac2dbd331e80bf
184 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs that point to known malicious redirectors and disposable hosting, indicating a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a common attack pattern for delivering malicious payloads or leading users to phishing sites.

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://yafferge.ru/award?keyword=biomass+briquettes+raw+material+pdf In PDF document text
    • https://cdn.sqhk.co/xejudawadoni/jhMFLjc/75061456565.pdfIn PDF document text
    • https://cdn.sqhk.co/janezewufaj/i5hfAjV/50591351673.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375894/normal_60588374bc2f7.pdfIn PDF document text
    • http://maretexojud.66ghz.com/93201874643.pdfIn PDF document text
    • https://cdn.sqhk.co/zixedagiro/hL0p2ah/diburuzekox.pdfIn PDF document text
    • https://cdn.sqhk.co/dobajinorite/33hh7am/sudigotolilemi.pdfIn PDF document text
    • https://cdn.sqhk.co/busanurutar/ig0hgAp/39169773183.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402944/normal_6040b6bc9aa5b.pdfIn PDF document text
    • https://cdn.sqhk.co/leporolino/jje5ijh/92497120533.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4498834/normal_603653066c772.pdfIn PDF document text
    • https://cdn.sqhk.co/zavilisuga/gYgdhb3/8723361647.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406202/normal_5fec53044688e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vogojitipam.epizy.com/vusogeneriboginokerokixa.pdfIn PDF document text
    • http://wogulixa.epizy.com/sri_vishnu_sahasranama_stotram_in_hindi.pdfIn PDF document text
    • http://safefimij.epizy.com/psychology_from_inquiry_to_understanding_4th_edition_citation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c0d2b76-b78f-46a5-a4ff-a1aa5f000f9c/9345850405.pdfIn PDF document text
    • http://namifaku.epizy.com/disaror.pdfIn PDF document text
    • http://nolerepegumadoz.epizy.com/parametri_configurazione_alice_mail_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37fa2a81-95c6-4993-8b28-088bafdf7c93/10449397083.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_off00012469.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12469 5592 bytes
SHA-256: cbe4cb1a5d3af2ad071063cd4cce87c7e066682ad785c77d6960cda764478f9f
font_01_sfnt_off0001375a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1375A 10908 bytes
SHA-256: 7cbe311a583f3c8f8d3c1e4daf3a6fc9f596ed2bfb0d21c612e79854ecd77807

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