Malicious PDF — malware analysis report

Static analysis result for SHA-256 a063488ede1911a1…

MALICIOUS

PDF

71.8 KB Created: 2020-12-30 01:12:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 42bf239186fe356ad0505b215826da71 SHA-1: 2aa8ac4e386a56be8dcbca2732f660992a5641c0 SHA-256: a063488ede1911a10f4fa60ff8bc33f3927f3d10a55cccbbbb901eb81cbc9dfe
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a link to a known malicious redirector, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URL point towards a phishing lure disguised as information about 'Monster hunter world weapons beginner'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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.
  • 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://cctraff.ru/strik?utm_term=monster+hunter+world+weapons+beginner In PDF document text
    • https://cdn-cms.f-static.net/uploads/4404112/normal_5f93a9678ed90.pdfIn PDF document text
    • https://cdn.sqhk.co/nukuzulu/cgdhfih/disikojevanexojem.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370063/normal_5f9bdb4e5f56d.pdfIn PDF document text
    • https://cdn.sqhk.co/sirejeforox/Or5geyP/mac_management_action.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367940/normal_5f8af1bb8a909.pdfIn PDF document text
    • https://cdn.sqhk.co/duditizonut/jehchgf/1972163819.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420764/normal_5fc095fccd33c.pdfIn PDF document text
    • https://cdn.sqhk.co/nupegefozub/dijZyQW/world_cup_2022_qualifiers_asia.pdfIn PDF document text
    • https://cdn.sqhk.co/sozaxejiv/f4jgTjg/nizowuk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486775/normal_5fc829e0a94bc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448556/normal_5fa1cef2c1a65.pdfIn PDF document text
    • https://cdn.sqhk.co/vibifexode/Oiaijjh/freeway_rapper_weight_loss.pdfIn PDF document text
    • https://cdn.sqhk.co/wotutovebo/h2DYjcm/nails_salon_near_me_walmart.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367680/normal_5f88586737433.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/feb225d3-0067-490f-8cc1-4871859590b0/margaritas_near_me_menu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb1ab84c-6b5f-4880-8e68-a069ec91fef0/24169612977.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_off0000dad9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAD9 5460 bytes
SHA-256: 2b51ca1b73410d6ae9f60591d15115becc7f33d1800fdb737578bb85082fe2d4
font_01_sfnt_off0000ed74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED74 10620 bytes
SHA-256: 005c1e7ba6198da332fcbf00f4a1f60a97339921f282db626ad80209edf9569c

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