Malicious PDF — malware analysis report

Static analysis result for SHA-256 eed4965917097ca6…

MALICIOUS

PDF

77.2 KB Created: 2021-04-26 13:25:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: a235516ed734b40e984fda23c3da66dd SHA-1: 2cb7806025af584d1049349751536a3556ccc03c SHA-256: eed4965917097ca68fcb9c248f0f0b007288752b83e05c2df9c11310f41ddc3c
184 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics, including a critical finding for linking to known malicious redirector infrastructure. The embedded links, such as 'https://dafemum.ru/strik?utm_term=how+to+use+canon+powershot+sx530+hs+as+webcam', are designed to lead users to potentially harmful sites. The document's structure and numerous links suggest a phishing or scam attempt, likely delivered as a spearphishing attachment.

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://dafemum.ru/strik?utm_term=how+to+use+canon+powershot+sx530+hs+as+webcam In PDF document text
    • http://silekutum.medianewsonline.com/alias_grace_script.pdfIn PDF document text
    • https://sidutoxa.weebly.com/uploads/1/3/4/8/134886075/moxuxodipe_xuvanageratit_zigerenaka_rikagivezogij.pdfIn PDF document text
    • https://luwuruguvuwotom.weebly.com/uploads/1/3/0/9/130969706/jotemomix-jomed-momoxogo-kajudapatuwaf.pdfIn PDF document text
    • https://zusifupovososix.weebly.com/uploads/1/3/2/6/132680896/025c97.pdfIn PDF document text
    • http://lobabinuladeri.medianewsonline.com/62044908255.pdfIn PDF document text
    • http://wubujonil.getenjoyment.net/patriotism_vs_nationalism.pdfIn PDF document text
    • https://lisiruzefixa.weebly.com/uploads/1/3/4/4/134495270/fepifex.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://5fb42ee6-a9be-400a-98f2-f9d4b9f720c8.filesusr.com/ugd/1813b3_e6a5de5503144b2982b0e1086569c14c.pdf?index=trueIn PDF document text
    • https://b18ac5c8-c825-4c59-a0a1-290c879ce4f6.filesusr.com/ugd/1a0fde_bc55b46052564b3aa456d56ce7373c2d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/971d9a96-f80b-46ba-88c4-709662e318d0/the_ultimate_guide_to_the_rider_waite_tarot_free.pdfIn PDF document text
    • https://s3.amazonaws.com/jutenojamega/39324865257.pdfIn PDF document text
    • https://6e337ffa-6c75-4e98-916f-0cab85e7e3f5.filesusr.com/ugd/a22560_7f3e9d485ad0459fad25899df9ffef28.pdf?index=trueIn PDF document text
    • http://lexekuduwowig.atwebpages.com/contabilidad_de_costos_carlos_fernando_cuevas_3_edicion.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e518f3b6-cd69-4f43-ad2a-d9ac30a5c25f/how_to_scan_multiple_pages_brother_hl-l2395dw.pdfIn PDF document text
    • https://b585a76b-fab5-4024-b0d2-f3ad95444197.filesusr.com/ugd/404203_5a60388a6f714c93a3da316e861decb5.pdf?index=trueIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e361.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE361 2828 bytes
SHA-256: f1383d7cd59a6739427f7596f1165603adacbacc8f657d4e156367611f565abb
font_01_sfnt_off0000ed6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED6A 5832 bytes
SHA-256: b3ff9c1d010bf0d84bcb472e5e3c0cdad51a7a565a05a26f83c282b41544fcac
font_02_sfnt_off0001012d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1012D 11136 bytes
SHA-256: e410be7c123519a9422251d71b9ebdb5b1ce3b46351b7e53db536e82fd60bd55

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