Malicious PDF — malware analysis report

Static analysis result for SHA-256 23624286e7d698cc…

MALICIOUS

PDF

86.9 KB Created: 2021-05-23 10:35:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: cb45fb7015ebfd1558ecf66ef8f5b702 SHA-1: d0d4c0879bb3d34898e75e3bd3f0f7a1a232dbf8 SHA-256: 23624286e7d698cce875aef2b3d60b430bee534327dcb839b9dff683e32029e5
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL leading to a site offering a 'nostradamus predictions in tamil pdf free download'. ClamAV and an ML classifier flagged this PDF as malicious, specifically as a phishing trojan. The presence of an external URI and the nature of the lure suggest a phishing attempt to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://xajibur.ru/strik?utm_term=nostradamus+predictions+in+tamil+pdf+free+download PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4449192/normal_5ffba5b90cb2d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4529024/normal_60462e1789b54.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410431/normal_605799181a384.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449793/normal_6051cc2640f71.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445324/normal_6063c7fb80b0d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403428/normal_5ff087a91c673.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481289/normal_6008305276b69.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474449/normal_60618f6e4dc5a.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/xakusineba/puxat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4aaf7b5-75f0-45a3-8279-74f0b90ef192/what_does_godfather_mean_in_the_bible.pdfIn PDF document text
    • https://s3.amazonaws.com/woxewiwupir/77307741624.pdfIn PDF document text
    • https://s3.amazonaws.com/fikuvine/life_life_quotes.pdfIn PDF document text
    • https://s3.amazonaws.com/radubozufiwo/how_to_pair_michael_kors_smartwatch_with_android.pdfIn PDF document text
    • https://s3.amazonaws.com/bokelur/org._apache._hive._jdbc._hivedriver_jar_file.pdfIn PDF document text
    • https://s3.amazonaws.com/posaxugidut/because_the_internet_album_zip_sharebeast.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e75cc2f6-0101-41c6-bf17-3d4fb7bb1a62/when_to_read_sundara_kandam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c3e5cf4-b4aa-4725-af7e-7b43079dd3fa/jawikigojijizubub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab13a4f1-53c4-4e1c-b4cb-5d5f41df3bb4/black_swan_nassim_taleb_audiobook_free.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_off000110b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110B9 5364 bytes
SHA-256: 59fbab4f60b9b1c6b4b09c5da1144a36dc953b7391ce3b45535ba4cfb87991a2
font_01_sfnt_off000122f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122F7 12588 bytes
SHA-256: 8d806bc04ba3eb5ab742304d72ff5352ca205043d79ccfc58b2ad40d680e32b6

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