Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e0ea9dfcdb5c246…

MALICIOUS

PDF

75.8 KB Created: 2021-02-15 00:30:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 42a5d8963588d574c5636bae75606efc SHA-1: 9ed264644e2c5b7aeb8f32ec563063d1e5568695 SHA-256: 8e0ea9dfcdb5c246a9362e7517537ca47c2b8406cb65be2c3f0f09c74dedbae3
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://bologen.ru/123?utm_term=properties+of+bases+and+alkalis PDF link annotation
    • https://dudunetexuzo.weebly.com/uploads/1/3/1/3/131379759/4243727.pdfIn PDF document text
    • http://kuroramogesok.iblogger.org/ultratech_im-_1270_datasheet.pdfIn PDF document text
    • https://xitukamobem.weebly.com/uploads/1/3/4/6/134643312/e97a126939187.pdfIn PDF document text
    • https://bepixumute.weebly.com/uploads/1/3/5/3/135302933/pomawiwawapu.pdfIn PDF document text
    • http://xexogafuko.22web.org/17501473786.pdfIn PDF document text
    • https://tatefazaseg.weebly.com/uploads/1/3/4/0/134016926/rixanadize-bomosituvuni.pdfIn PDF document text
    • https://gurekageta.weebly.com/uploads/1/3/2/6/132695257/kajusutagibiba-refiwu.pdfIn PDF document text
    • https://cdn.sqhk.co/pafatewodoju/jjhhoYv/47213373080.pdfIn PDF document text
    • https://danivuzi.weebly.com/uploads/1/3/2/6/132681213/2011336.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/xupovobejanam/annual_report_vinamilk.pdfIn PDF document text
    • http://texatopewewew.epizy.com/jetokonozisotovuvenefulo.pdfIn PDF document text
    • https://s3.amazonaws.com/kigavanus/cbse_9th_class_chemistry_notes.pdfIn PDF document text
    • http://zaxilofekuji.epizy.com/tda2050_bridge_amplifier_circuit_diagram.pdfIn PDF document text
    • https://s3.amazonaws.com/bikikanafopavu/78742225463.pdfIn PDF document text
    • https://s3.amazonaws.com/posufij/gipefinebopofavaba.pdfIn PDF document text
    • https://s3.amazonaws.com/megulu/microsoft_office_for_macbook_air_free.pdfIn PDF document text
    • https://s3.amazonaws.com/nopomewegobij/54132060503.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_off0000e8a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8A7 5240 bytes
SHA-256: c31ae1872649b48a70886031a874c576b7a23d91c78b20b93f1a63ce84737f97
font_01_sfnt_off0000fa7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA7E 11368 bytes
SHA-256: 55f1ea161eb638b6bf4b9fc85a1ce30fd99ade88cc079581c307d9e4f2e0d3c5

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