Malicious PDF — malware analysis report

Static analysis result for SHA-256 d80228416a890989…

MALICIOUS

PDF

68.0 KB Created: 2021-02-18 17:35:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 3dc27d2a97c8ce6826adc9d7165739e2 SHA-1: bc9a222afd15e0b37dddcd3c49ede1d8faba44cc SHA-256: d80228416a8909896f8d91ffdcd65ec4d190f13cbab1da900872d9be42a9ce9d
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, identified by heuristics and a machine learning classifier as malicious. The ClamAV detection further confirms its malicious nature. The document body, though heavily obfuscated, suggests a lure related to a specific PDF document title, likely to trick users into visiting the malicious URL.

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
  • 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://baarspo.ru/strik?utm_term=sahih+bukhari+roman+urdu+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4393752/normal_5fe9ed04ea4d2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476938/normal_6027c7c6d8021.pdfIn PDF document text
    • https://cdn.sqhk.co/xuluriwu/hgZhfje/battery_plus_bulbs_fairbanks.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478141/normal_6005206763717.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389074/normal_6029629d2ad16.pdfIn PDF document text
    • http://100naturals.fun/among_us_minecraft_skin_novawyh3m.pdfIn PDF document text
    • https://cdn.sqhk.co/rokijatu/HhhfffG/ohio_police_killed_in_the_line_of_duty.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365656/normal_6029a569e6728.pdfIn PDF document text
    • https://cdn.sqhk.co/dekavaka/iiOgdPT/62664746564.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417037/normal_5fe2064510076.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463825/normal_5fe7af5687aff.pdfIn PDF document text
    • http://lojasamericanasbr.com/68404284757g5khg.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/vebogotexaf/nassau_bahamas_local_weather_report.pdfIn PDF document text
    • https://s3.amazonaws.com/gosete/reguregotoxexigudu.pdfIn PDF document text
    • https://s3.amazonaws.com/bejexe/airtel_tv_pc_windows_10.pdfIn PDF document text
    • https://s3.amazonaws.com/migivewuwe/jegabokejirawug.pdfIn PDF document text
    • https://s3.amazonaws.com/wexoteluwag/raloxiredorofunajobuj.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bf83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF83 5064 bytes
SHA-256: 3086e552f566036f24267dcc6630916b12e26c688d0f739d64eaa5bb8444ca2d
font_01_sfnt_off0000d071.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD071 10208 bytes
SHA-256: d726383ed9274fe30b374235cabd666c46478e9937d4255539fe1325b826a164
font_02_sfnt_off0000f36d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF36D 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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