Malicious PDF — malware analysis report

Static analysis result for SHA-256 dbae5724656b1ff8…

MALICIOUS

PDF

71.0 KB Created: 2021-02-08 07:50:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 309702408c813268450e3d2c8f6375b9 SHA-1: 8682dd75b4c834ab7f696f01d5a5e0f1897862d3 SHA-256: dbae5724656b1ff820d461cb984a5dcb3e2049cbb4c8206824053bcc1ec2ab4f
184 Risk Score

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
  • 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=bonanza%20pizza%20menu%20pdf In PDF document text
    • https://xosinalujejiwa.weebly.com/uploads/1/3/1/4/131405948/fuwaniwav.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500668/normal_5feec4be0ba5d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381090/normal_6016bd7478068.pdfIn PDF document text
    • http://wupofifaxixusi.66ghz.com/30418829890.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451940/normal_5ff82d33643f3.pdfIn PDF document text
    • https://lubagevaruzazej.weebly.com/uploads/1/3/2/7/132712663/kutemebabobas_pifubun.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4472753/normal_5fde1151ef41b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417208/normal_6011a955989d6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://diribiboturo.epizy.com/povavuxukaxokisukivixupe.pdfIn PDF document text
    • http://galexuduxegi.epizy.com/aggiornamento_abox_android.pdfIn PDF document text
    • http://paguvodusijuwef.epizy.com/80641366389.pdfIn PDF document text
    • http://midofel.rf.gd/insignia_headphone_bluetooth_adapter_manual.pdfIn PDF document text
    • http://mekamaxabojumoz.epizy.com/mesuzizegitud.pdfIn PDF document text
    • http://fizenigapajawak.epizy.com/associer_2_document.pdfIn PDF document text
    • http://serepuzokoz.epizy.com/89979419237.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_off0000d740.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD740 4980 bytes
SHA-256: 1ca9cced23fe82a341af717636bcb874a0bd46b505fde0efa1b5a306dd38872f
font_01_sfnt_off0000e832.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE832 11864 bytes
SHA-256: e5b79bc46c9a4f0d6668304d95da287c34d4bdd65fe897b4f65672366d247285