Malicious PDF — malware analysis report

Static analysis result for SHA-256 80892697d1580737…

MALICIOUS

PDF

81.5 KB Created: 2021-03-22 11:22:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 932f8ce9b16681ae1f3c42995ec29949 SHA-1: ed3733d493576b98fbddefb997f9f7ac7baa72f6 SHA-256: 80892697d158073710c816c52ce9981e8273a2759c73e2a57c1ba4efc9646c5f
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious and phishing-related. It contains a large number of external links, with one prominent URL pointing to 'zajinet.ru', suggesting a link farm or redirection scheme. The document body is heavily obfuscated, preventing a clear understanding of its content, but the presence of numerous external links strongly indicates a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://zajinet.ru/strik?utm_term=lg+inverter+direct+drive+washer+dryer+lint+trap PDF link annotation
    • https://wegogutez.weebly.com/uploads/1/3/4/3/134310606/lamifabamevupa_jemijoju.pdfIn PDF document text
    • http://dinusedixiwog.iblogger.org/gilidatuzotekotewoxinoso.pdfIn PDF document text
    • http://moxawunanenubop.sportsontheweb.net/17590996173.pdfIn PDF document text
    • https://farumurul.weebly.com/uploads/1/3/5/3/135326432/masoraluw.pdfIn PDF document text
    • http://gomigapujasep.sportsontheweb.net/espacios_y_subespacios_vectoriales_algebra_lineal_ejercicios_resueltos.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://16fd3b15-5541-4454-9538-28daacbf497e.filesusr.com/ugd/e32576_7a2dcea73f3b4f49855b43cfc299afaf.pdf?index=trueIn PDF document text
    • http://jowawaba.atwebpages.com/causes_of_unemployment_download.pdfIn PDF document text
    • https://s3.amazonaws.com/penefelomiju/iomart_group_plc_annual_report.pdfIn PDF document text
    • http://paxerakomis.onlinewebshop.net/bupofokikutomimekiwifu.pdfIn PDF document text
    • https://s3.amazonaws.com/daxemo/one_punch_man_blast_revealed_reddit.pdfIn PDF document text
    • https://93dbb2ad-f1e8-4c6c-adfd-2ef134399473.filesusr.com/ugd/df4650_875eec5c3c7f4d18886cc89153aa045a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/peveziwoguxuzam/for_mac_os_x_10._9.pdfIn PDF document text
    • https://5cbbff6b-7c47-4fbb-abda-9de5069fbc88.filesusr.com/ugd/1a89c8_c63002a9b16b4157aa4ed0dd05138b3f.pdf?index=trueIn PDF document text
    • http://kugefosames.rf.gd/metallica_one_guitar_tabs.pdfIn PDF document text
    • https://599b09cd-7b6a-4758-94a3-08a08d316165.filesusr.com/ugd/628a76_01e0395ec02146a8a56663a05b06ef33.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fisulefajow/63311692508.pdfIn PDF document text
    • https://7a579b3f-ce96-4c66-abdc-991530493d29.filesusr.com/ugd/010c6b_648dc06720bf45d384588fb8c563c541.pdf?index=trueIn PDF document text
    • https://5613ab86-cfe5-4642-b9e1-29ab5e510d76.filesusr.com/ugd/79e000_b01703c9e92a4eafa4431aaf06541d14.pdf?index=trueIn PDF document text
    • http://jisijuvod.myartsonline.com/tales_of_arabian_nights_book_of_tales.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_off00010140.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10140 5532 bytes
SHA-256: 16aba0180f3ce972a228aaa1498cef335efb4c30dd148a70d14d0adf7651b212
font_01_sfnt_off0001142b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1142B 10560 bytes
SHA-256: f35248075743b79740dd819ae2ebdf12e090760936183af921e144e207886c70

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