Malicious PDF — malware analysis report

Static analysis result for SHA-256 da4aa01269c7c5af…

MALICIOUS

PDF

64.5 KB Created: 2021-02-22 00:53:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 03dea5d10116c2789dbdb963cddf54bd SHA-1: 02d0664f6296f48d38cc1cc37aef9269d8488504 SHA-256: da4aa01269c7c5af3704a953029aa2c2ed87c34674bcee22dc66316114c23b8a
104 Risk Score

Malware Insights

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

The ML classifier and ClamAV detection strongly indicate maliciousness. The presence of external URLs and a heuristic for a download button suggests a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are commonly used to facilitate the download of malicious payloads.

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
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://seumenha.ru/wix?keyword=ematic+converter+box+manual PDF link annotation
    • http://opticsystem.website/54902830796eg0is.pdfIn PDF document text
    • http://rerubin.space/santa_cruz_bronson_2015_size_guideyhenc.pdfIn PDF document text
    • http://boothattendant.com/532024708388j8nr.pdfIn PDF document text
    • http://mantenancie.com/16431892894yjqgm.pdfIn PDF document text
    • http://lanasobewusek.22web.org/tejaxelepuwi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366625/normal_6004a1b15bac4.pdfIn PDF document text
    • http://golosa-spasibo.ru/6272941652ztxpv.pdfIn PDF document text
    • https://xovobinawulum.weebly.com/uploads/1/3/4/8/134883327/8154382.pdfIn PDF document text
    • http://detonic-italia.website/amazon_prime_video_movies_october_2020tt0bw.pdfIn PDF document text
    • http://mosquito.codes/ritter_m9_ultraclave_manualtlq3b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411252/normal_5ff57ec7e8fc0.pdfIn PDF document text
    • https://nagejezesalu.weebly.com/uploads/1/3/0/8/130874580/rovavarab.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/paxivogedewilu/viper_alarm_remote_battery_died.pdfIn PDF document text
    • https://s3.amazonaws.com/jevelel/is_ocarina_of_time_available_on_switch.pdfIn PDF document text
    • https://s3.amazonaws.com/tubukeganuji/65200362234.pdfIn PDF document text
    • http://vopapokolozanum.rf.gd/57693808541.pdfIn PDF document text
    • https://s3.amazonaws.com/bagisi/kimolameluxezuwifonekube.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_off0000c0be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0BE 4992 bytes
SHA-256: 741eb86776939e75ac8399b80b4b52f98f1dd7695eb94c4e428ec351d3d6a845
font_01_sfnt_off0000d1ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1AD 10424 bytes
SHA-256: 23709ffcacbaf85ceae7bd042a62e1de1519179e4c1c2148b3413dbd44e189c1

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