Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3ce33929a0bc8eb…

MALICIOUS

PDF

70.6 KB Created: 2021-03-10 14:00:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: e8eda6f11430bf5319b88883c86daf8c SHA-1: 3aa35a40f5c39abd769a204fa2647050bace118f SHA-256: a3ce33929a0bc8eb61d2588c8ff206ec9d3b82112bde1fb4d6ff0ce2518c9ee0
156 Risk Score

Malware Insights

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

The PDF file contains embedded URLs that lead to external websites, suggesting a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, contains text related to operating a Jenn-Air oven, likely a lure to disguise the malicious nature of the PDF.

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://xezojetit.ru/wb?keyword=how%20to%20operate%20a%20jenn%20air%20oven PDF link annotation
    • https://kujivorel.weebly.com/uploads/1/3/0/7/130776875/3061372.pdfIn PDF document text
    • https://tugagofinose.weebly.com/uploads/1/3/0/8/130874012/1772348.pdfIn PDF document text
    • https://dagakaxogofawi.weebly.com/uploads/1/3/4/6/134699425/ragal.pdfIn PDF document text
    • https://vubopedu.weebly.com/uploads/1/3/6/0/136083963/zewefime.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://9534cc33-30dc-483d-bed2-8d5691710d48.filesusr.com/ugd/3835dd_87126aed541b4fd682627bcffc38d5b8.pdf?index=trueIn PDF document text
    • https://6e7ef639-f89a-4701-86f9-710a836f1183.filesusr.com/ugd/12745a_09f9df88cfa44b3db0e378e3e24764b8.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b5b7e337-8f62-41f1-a24e-c0fc9452acea/lijasarosetu.pdfIn PDF document text
    • https://327bbe42-9aa5-4ca0-80e5-6c9857058a26.filesusr.com/ugd/2b870b_ed0106460abe4690af556832ca335e69.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fuwuzerijofa/wiborimazeveruwaz.pdfIn PDF document text
    • https://s3.amazonaws.com/novifamigot/bhai_ka_birthday_song_free.pdfIn PDF document text
    • https://s3.amazonaws.com/jazofi/xagawobi.pdfIn PDF document text
    • https://s3.amazonaws.com/fidefofudi/christmas_images_jesus.pdfIn PDF document text
    • https://df256b98-640c-444d-885a-8195c7360722.filesusr.com/ugd/40b9e6_0c62a3e61185404fb51f70155794c100.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/77c297a1-f5c5-4221-97a2-bde36a2b32be/keto_diet_cookbook_barnes_and_noble.pdfIn PDF document text
    • https://s3.amazonaws.com/rilexazejuzovep/movies_counter_full_movie_hd.pdfIn PDF document text
    • https://s3.amazonaws.com/salade/workbook_add_worksheet_vba.pdfIn PDF document text
    • https://s3.amazonaws.com/gotenukevepunin/91372432094.pdfIn PDF document text
    • https://f867c6cd-7aae-4938-a634-6821dcb48262.filesusr.com/ugd/eb45fa_4b0c6a1b5f6742a6928963cb43da2947.pdf?index=trueIn 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_off0000ccf9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCF9 4580 bytes
SHA-256: 0dde28d0af93bacd19f11c55f96334887b9853a8f7efdbc5427e9f6b8e9bf576
font_01_sfnt_off0000dca4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCA4 10224 bytes
SHA-256: 9e0ac5d373881c4978fb7c151acc9ef74ab2cd64485cfbf5bad9833ccaafd930
font_02_sfnt_off0000ff5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF5D 4324 bytes
SHA-256: 8405bb6ca9a6fb718a2e910e1cdde4d74ac2122cab0061dc5f772322db9c7ccd

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