Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c253110e6b2b7af…

MALICIOUS

PDF

82.5 KB Created: 2021-04-02 17:49:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: bd7c09976bf60272c0276f05b0190b8a SHA-1: 44a4b794f093cbbefffe840275f679f1a8d24160 SHA-256: 0c253110e6b2b7af84153a8e95c89baa3fcc2d08e96ed22d174acdca27e386e1
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'https://nipisod.ru/123?utm_term=new+christmas+audio+songs+2018+telugu', which is likely a lure. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect the user to a malicious site, consistent with a phishing or malware distribution campaign.

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://nipisod.ru/123?utm_term=new+christmas+audio+songs+2018+telugu PDF link annotation
    • https://cdn.sqhk.co/kasavakujosi/jfghijB/zisuvanifinepudax.pdfIn PDF document text
    • https://cdn.sqhk.co/bodorosuzuta/j0tcqdy/28258326119.pdfIn PDF document text
    • http://lamaded.mywebcommunity.org/livoxowapagakitusoz.pdfIn PDF document text
    • http://lekiduzixixawuj.22web.org/13775337209.pdfIn PDF document text
    • https://cdn.sqhk.co/duponetix/hiTP1ij/gufufugupetis.pdfIn PDF document text
    • http://durorazi.22web.org/suloti.pdfIn PDF document text
    • http://gafuvufafokujop.sportsontheweb.net/asgard_archaea_illuminate_the_origin_of_eukaryotic_cellular_complexity.pdfIn PDF document text
    • http://jexekiraj.sportsontheweb.net/application_security_architecture.pdfIn PDF document text
    • http://nejevefivi.mypressonline.com/sotorami.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/xopugup/46955476809.pdfIn PDF document text
    • http://mijikabetabup.rf.gd/jelojuko.pdfIn PDF document text
    • https://s3.amazonaws.com/mokuwanibof/gowom.pdfIn PDF document text
    • https://s3.amazonaws.com/jamuluvuvava/24818307023.pdfIn PDF document text
    • https://s3.amazonaws.com/xoguwavosuje/65580990369.pdfIn PDF document text
    • http://luwulifinuneti.epizy.com/blur_background_image_android_studio.pdfIn PDF document text
    • https://s3.amazonaws.com/fasomusogapovi/90858059533.pdfIn PDF document text
    • http://segimoto.myartsonline.com/les_journaux_algeriens_en_franais.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC90 5936 bytes
SHA-256: ef054e80be70783846ee7be1ac356851b38ef171d3d0820f2b2d5eab2bc19642
font_01_sfnt_off000100b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100B0 10864 bytes
SHA-256: 96c3aa77d13ae038543bc36a8b175d57da6bd4e93cda3f1776b7f479192123de
font_02_sfnt_off00012591.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12591 16312 bytes
SHA-256: aad9bc0f36eadc3314e08670b59090120051e308b357201f134af3d0b781b2b0

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