Malicious PDF — malware analysis report

Static analysis result for SHA-256 6da0ae5725cc99f9…

MALICIOUS

PDF

72.4 KB Created: 2021-02-09 11:19:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: b651060cbb21b365f1a86667393928fd SHA-1: 26a3e8c386b02b0d7d2bb6f38675e82b95fa5659 SHA-256: 6da0ae5725cc99f9f539a34e7ce2c4029ea5883ac6b31ef388d287c9d8a4ee57
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to redirector infrastructure or other PDF files, indicating a link farm designed to distribute malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 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.
  • 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/wb?keyword=ambareesha%20movie%20songs%20free In PDF document text
    • https://static.s123-cdn-static.com/uploads/4466376/normal_5ffccb2258074.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489409/normal_5fe155ee5cb4d.pdfIn PDF document text
    • https://cdn.sqhk.co/tuxonewebuke/gij4Chi/99116303291.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464297/normal_5fe7dd4dc73b5.pdfIn PDF document text
    • https://vexuzunudupugez.weebly.com/uploads/1/3/0/7/130740013/geparij.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388060/normal_5fe23e15f1ade.pdfIn PDF document text
    • http://ins.expert/2589471914639ste.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368504/normal_5fe1ce147f0ba.pdfIn PDF document text
    • https://cdn.sqhk.co/ranotigu/3JtaQhh/school_driving_3d_mod_apk_free_download.pdfIn PDF document text
    • http://specialsale.info/8744166986l4uur.pdfIn PDF document text
    • https://palujaburufo.weebly.com/uploads/1/3/2/7/132740236/wumav-nusazuzudin-vizakamuniwo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421217/normal_5fd3afb25733d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476272/normal_600e6f3e45efc.pdfIn PDF document text
    • http://leopolds.space/at_t_digital_life_chat_supportr6nop.pdfIn PDF document text
    • https://cdn.sqhk.co/vedanoderifu/Iuicyhh/coin_collection_album_flipkart.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376621/normal_60013f993b3c5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388067/normal_601f32dd04ce3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417321/normal_600946762942e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366043/normal_5ff5b2cbef429.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410016/normal_600caa78ae4c3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487663/normal_5ff942ba33c29.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_off0000ddcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDCF 5336 bytes
SHA-256: b318905079e5583c018352e0c59b9d2e84d68db9ba00c8654f6752d889d32b76
font_01_sfnt_off0000efd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFD6 10752 bytes
SHA-256: 01ffa270702f6285ca6ce58e1ebb92b4908bf130f115b0febcc26d1bbb8490f0

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