Malicious PDF — malware analysis report

Static analysis result for SHA-256 0562df8e2e2931c3…

MALICIOUS

PDF

78.5 KB Created: 2021-03-23 01:47:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dfc07de26ae3f86bf82cb47d3900af00 SHA-1: d29039d44ffd46c93bfad827f480a7eef1de5e8d SHA-256: 0562df8e2e2931c37c37f73547a91024e6b5aabe3080505032b930050fc276db
156 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to suspicious domains and are indicative of a link farm or phishing operation. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://xezojetit.ru/aws?utm_term=how+to+be+a+swat+medic
    • http://wupulij.22web.org/54993722291.pdf
    • http://dasazopemobor.mywebcommunity.org/65116586790.pdf
    • https://cdn-cms.f-static.net/uploads/4451228/normal_6020b599abb5e.pdf
    • https://cdn-cms.f-static.net/uploads/4417325/normal_6011ec287c75b.pdf
    • https://cdn.sqhk.co/dapalufited/63gghgJ/500_words_2019_live_lesson.pdf
    • https://static.s123-cdn-static.com/uploads/4458824/normal_5fe44b3ecf02c.pdf
    • https://cdn.sqhk.co/vanujapuduti/MjejgGm/vupoxufetajutomemomovadiw.pdf
    • https://cdn-cms.f-static.net/uploads/4446511/normal_603f06f908a03.pdf
    • https://cdn-cms.f-static.net/uploads/4371269/normal_6028f156f3ce5.pdf
    • http://pumaguli.scienceontheweb.net/11720972561.pdf
    • https://pupalizote.weebly.com/uploads/1/3/4/7/134716330/rosanikafivozu.pdf
    • http://ziposodepow.mywebcommunity.org/kafapetap.pdf
    • https://cdn-cms.f-static.net/uploads/4500911/normal_6043131502a4a.pdf
    • https://cdn-cms.f-static.net/uploads/4449181/normal_5fe79088b33a3.pdf
    • https://cdn.sqhk.co/xuxumududu/Qyjmihb/youtube_diy_surgical_mask_pattern.pdf
    • https://nuxelimifa.weebly.com/uploads/1/3/0/7/130776070/milevizumezaxar_lezubuposile_zitagibuk.pdf
    • https://cdn-cms.f-static.net/uploads/4443819/normal_6024447f29e22.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://maxaluvobewog.epizy.com/chakravarthy_kannada_movie_darshan.pdf
    • http://jasixinupij.epizy.com/navogopizomemozekekemeja.pdf
    • http://kitosigefowo.epizy.com/gujuralimokow.pdf
    • http://voxumawewu.epizy.com/crock_pot_digital_instructions_symbols.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f3f1.bin
bedaacc3b7c0f8a7af40948e9e409c3a9f643e2179c9bc807228640b08e08a58		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF3F1 5148 bytes
font_01_sfnt_off00010573.bin
972bb94e8f1e2f1b3866515814b282d6f1c02eda91304085e2a56fb0565326ff		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10573 11592 bytes

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