Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c74bbd37b79243f…

MALICIOUS

PDF

116.3 KB Created: 2021-01-30 04:32:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 7c678b72c2a9db15567bdb1992c9b4d6 SHA-1: 35c81af7a72aa92aac63abd30d22cbd03efe94fe SHA-256: 6c74bbd37b79243f16402465b6cc825894805c71807fb11e71ac520a6ef35112
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'https://jacksth.ru/aws?utm_term=new+tamil+movies+2019++telugu', which is likely part of the phishing lure. The document body, though heavily obfuscated, appears to contain keywords related to movie searches, reinforcing the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://jacksth.ru/aws?utm_term=new+tamil+movies+2019++telugu PDF link annotation
    • http://wilozobugo.iblogger.org/hollywood_3d_movies_in_telugu_free.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486751/normal_5ff2267a8ee2b.pdfIn PDF document text
    • http://wawimetuboze.iblogger.org/88667215606.pdfIn PDF document text
    • https://cdn.sqhk.co/keropolor/Cgfpgga/72828110555.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://s3.amazonaws.com/bulujono/borland_c_free_softonic.pdfIn PDF document text
    • https://s3.amazonaws.com/rixevozajixezos/bluetooth_software_for_windows_7_softonic.pdfIn PDF document text
    • https://s3.amazonaws.com/xowasosuf/agar._io_apk_hack.pdfIn PDF document text
    • https://s3.amazonaws.com/pusolefosex/94555753744.pdfIn PDF document text
    • https://s3.amazonaws.com/legapatatezisa/irda_guidelines_for_life_insurance_2019.pdfIn PDF document text
    • http://vumupekosevi.rf.gd/80981289488.pdfIn PDF document text
    • http://sulonofanez.rf.gd/vazewa.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00015d43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15D43 5512 bytes
SHA-256: a4e34d6fb8a515f7fd888ac023dc8ac83fb1cce5e80528b430ed3ec8382afeb3
font_01_sfnt_off0001700e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1700E 6664 bytes
SHA-256: 62b3deeeb7b0f4675658e82af90c9ed7f3dccc0bf22dd60050dd6e2673e40ec6
font_02_sfnt_off0001851e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1851E 12836 bytes
SHA-256: 3ff02a407f6710217e58adbafefd6f4de8fa2f8fffc559f368a31a964efd54c8
font_03_sfnt_off0001ae8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AE8E 16164 bytes
SHA-256: ead7fd593d7f5feef6f283420e9b55f8fa4552f107c64b0063d474dd3355abd8

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