Malicious PDF — malware analysis report

Static analysis result for SHA-256 688a174f42270cbe…

MALICIOUS

PDF

77.8 KB Created: 2021-05-03 08:15:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: cac9bf773eb1141a8855851fc494ef4f SHA-1: 8c86121101ecd0fc12e9a23e3922c2959c60c376 SHA-256: 688a174f42270cbef7c42b247349f54b89e09ccefe07713652c54259e959fd20
96 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains an embedded URI pointing to 'https://nipisod.ru/strik?utm_term=wordly+wise+3000+book+3', suggesting a phishing or malware distribution attempt. While no scripts were explicitly extracted, the PDF structure and embedded URLs indicate a likely attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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://nipisod.ru/strik?utm_term=wordly+wise+3000+book+3 PDF link annotation
    • https://xelegiri.weebly.com/uploads/1/3/4/4/134435730/3465a76c94b4d3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470968/normal_5fd26606d3fe4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4423430/normal_5fdd6a0fc6576.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486359/normal_5fec447910633.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408002/normal_6028b574edc89.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489409/normal_6039268f262c2.pdfIn PDF document text
    • https://suzeziji.weebly.com/uploads/1/3/0/7/130739492/104f1fb339e.pdfIn PDF document text
    • https://rejoxaratexudo.weebly.com/uploads/1/3/1/4/131453252/lixadezeg_gezusakuki_muwinimejojo.pdfIn PDF document text
    • https://cdn.sqhk.co/tilafukefuwe/cPja5hd/92453168930.pdfIn PDF document text
    • https://cdn.sqhk.co/letarezetap/iihhef5/96373328558.pdfIn PDF document text
    • https://zijolafazul.weebly.com/uploads/1/3/0/8/130873795/3178367.pdfIn PDF document text
    • https://cdn.sqhk.co/bupewazadufa/GjedgjT/perfect_piano_guys_score.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/luropi/bioscope_apk_hack.pdfIn PDF document text
    • https://s3.amazonaws.com/ronatiduzoxij/getuwuwejamutazujarowemir.pdfIn PDF document text
    • http://wuzuferopo.epizy.com/65204938709.pdfIn PDF document text
    • https://s3.amazonaws.com/genukopapovixo/what_does_a_flashing_light_mean_on_apple_tv.pdfIn PDF document text
    • https://s3.amazonaws.com/sowirutelevolur/espn_memphis_grizzlies_injury_report.pdfIn PDF document text
    • http://vujofif.epizy.com/how_to_opens_on_kindle_fire.pdfIn PDF document text
    • https://s3.amazonaws.com/fowikorejodi/kulidukadokivobodutid.pdfIn PDF document text
    • http://sobogasitizi.epizy.com/purple_color_background_wallpapers.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_off0000f24d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF24D 5328 bytes
SHA-256: 6f71b97fd9558ee682087e8adf3f826ae2b645390fdb60c514b3a1dbea2ed7b8
font_01_sfnt_off00010499.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10499 10556 bytes
SHA-256: c7ee985766d20ba899b78c09c16dcb16f9ee4181e5683a7dfecd825aa815d58e

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