Malicious PDF — malware analysis report

Static analysis result for SHA-256 7357d94bda747a08…

MALICIOUS

PDF

69.9 KB Created: 2021-02-17 05:33:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: afa9bdffa6f0065a6b40d0b88fa55865 SHA-1: 45c4fc01936b63d22ba83a94418c1d57bdfb93ef SHA-256: 7357d94bda747a0800d6afa27e4ff10e602bb6c7162cb26fee19e474b9a059ff
156 Risk Score

Malware Insights

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

The file was flagged by multiple heuristics, including PDF_SEO_LINK_FARM and ML_NYX_PDF_MALICIOUS, indicating a high likelihood of malicious intent. The PDF contains numerous external links, with the primary ones pointing to suspicious domains like jottigo.ru and reassurez-moi-fr.info, suggesting a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of malicious document activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://jottigo.ru/123?utm_term=select+the+correct+ground+state+electron+configuration+for+sulfur+%2528z+%253D+16%2529 PDF link annotation
    • http://reassurez-moi-fr.info/pujuzibeloeqggl.pdfIn PDF document text
    • http://aazzzry.space/229443100024kpxl.pdfIn PDF document text
    • https://pujuwofox.weebly.com/uploads/1/3/4/8/134882524/7f89c36f70a35d5.pdfIn PDF document text
    • https://dufofumiwiz.weebly.com/uploads/1/3/5/3/135309849/a56e33523.pdfIn PDF document text
    • https://tababara.weebly.com/uploads/1/3/0/7/130739165/vuserotul.pdfIn PDF document text
    • http://helpcenterbusiness.xyz/80164115503blbrg.pdfIn PDF document text
    • http://fizovovapoz.iblogger.org/pafamuxiv.pdfIn PDF document text
    • http://konupakefatameb.22web.org/abrao_de_pai_cifra.pdfIn PDF document text
    • https://bopugokux.weebly.com/uploads/1/3/4/9/134901566/zixinefateluj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/jowutoneranemuk/accounts_basic_notes.pdfIn PDF document text
    • https://s3.amazonaws.com/vonuxagupeduze/62073361731.pdfIn PDF document text
    • https://s3.amazonaws.com/kiguteperilodu/wobejuvewegitarosalati.pdfIn PDF document text
    • https://s3.amazonaws.com/gotenukevepunin/6752412981.pdfIn PDF document text
    • http://gevorewububew.epizy.com/merge_multiple_excel_sheets_into_one.pdfIn PDF document text
    • http://poravilotizeve.epizy.com/client_contact_form_template_word.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c472.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC472 5724 bytes
SHA-256: 999c19af0752e15dcc202b343176bc78e8b2e264d52cbfb3809b89ea2f3ad322
font_01_sfnt_off0000d801.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD801 10752 bytes
SHA-256: c65cfa7b9ed0fcbba434a53242ed181654660de475670f622bb0460f2a2eaf27
font_02_sfnt_off0000fc06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC06 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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