Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7a0498f323ad8c9…

MALICIOUS

PDF

78.1 KB Created: 2021-05-20 06:49:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5f64c633951cb620222ebd2be1240f8d SHA-1: 2a56560e54c9796be78c5ebe59d8f9e9be5b613d SHA-256: c7a0498f323ad8c929bf2edfbd4d87bc9f43df22b7cb6d903970c5742bdf7121
156 Risk Score

Malware Insights

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

The PDF file contains a significant number of external links, identified as a link farm, pointing to various domains including 'xezojetit.ru' and multiple 'weebly.com' subdomains. This technique is commonly used to distribute phishing content or redirect users to sites hosting malware. The ClamAV detection and ML classifier further support the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://xezojetit.ru/strik?utm_term=evaluation+phrase+simple+complexe+cm1
    • https://makurabun.weebly.com/uploads/1/3/4/6/134651698/menuwejejojujuw.pdf
    • https://mavekajokirusap.weebly.com/uploads/1/3/1/4/131437454/kobarexebilumufiruki.pdf
    • https://libuxokoxirafax.weebly.com/uploads/1/3/2/6/132695332/memaxa.pdf
    • https://najunewuzerus.weebly.com/uploads/1/3/1/4/131408250/ziwurodidavetigupivu.pdf
    • https://rifidikebipe.weebly.com/uploads/1/3/0/9/130969129/0bb4cdbffb8.pdf
    • https://wikerewozuzap.weebly.com/uploads/1/3/4/8/134868679/2339438.pdf
    • https://jekowidemovo.weebly.com/uploads/1/3/4/7/134702183/takapejofik.pdf
    • https://zezevavibafano.weebly.com/uploads/1/3/5/3/135325489/5637430.pdf
    • https://lozusometuzasop.weebly.com/uploads/1/3/4/7/134741376/e978990ce.pdf
    • https://mumizajasaliso.weebly.com/uploads/1/3/4/5/134598274/482602.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/jovekus/4939286832.pdf
    • https://s3.amazonaws.com/kudefem/party_invitation_templates_online.pdf
    • https://s3.amazonaws.com/zuponefi/21950595527.pdf
    • https://s3.amazonaws.com/wupagivoz/cg_songs_mp4.pdf
    • https://s3.amazonaws.com/febopa/tokasepolinot.pdf
    • https://uploads.strikinglycdn.com/files/b0f21b3e-5b6a-4409-860a-1d9b6dbddcd5/morse_4400_sewing_machine_parts.pdf
    • https://s3.amazonaws.com/putelekireza/lepadajabagudaxige.pdf
    • https://s3.amazonaws.com/bitajemisajoz/circle_theorems_cheat_sheet.pdf
    • https://uploads.strikinglycdn.com/files/7b45e75d-6eca-4943-a6d2-c073ceb97a17/gozorolejefisanu.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000efb4.bin
d598def137d13ca69dbbab32afa9af87602f197a759b2ccc12c1a0b25bd6e85c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEFB4 5308 bytes
font_01_sfnt_off000101a7.bin
48ce2d9f455d5964552cc68410df36b240503cf8ac8686ec8f20a0484bf99349		 pdf-font-stream PDF embedded font (sfnt) at offset 0x101A7 12368 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.