Malicious PDF — malware analysis report

Static analysis result for SHA-256 e760a522f8e58f2f…

MALICIOUS

PDF

76.9 KB Created: 2021-04-24 03:21:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 3e91608d5a17afdde62baf4f01cc8442 SHA-1: 83c24ff228ae226891906f0e3f5da7b859b5cb17 SHA-256: e760a522f8e58f2f108a4d248d0b3d77d3ff56980dcfb85457353741726c75da
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9996

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://mezovuduw.ru/strik?utm_term=how+to+remember+covalent+and+ionic+bonds PDF link annotation
    • https://kivupopemuti.weebly.com/uploads/1/3/4/3/134318129/3b631c54.pdfIn PDF document text
    • http://kidepokapila.22web.org/wobifasesemobona.pdfIn PDF document text
    • http://tarosuzaloku.22web.org/cdl_practice_test_ohio.pdfIn PDF document text
    • http://tepepowaz.22web.org/msds_boraks.pdfIn PDF document text
    • https://bogatogofaz.weebly.com/uploads/1/3/4/7/134705351/b5eb1b40f35d.pdfIn PDF document text
    • https://webebusili.weebly.com/uploads/1/3/0/9/130969565/wetotulogerap.pdfIn PDF document text
    • https://sapurokegija.weebly.com/uploads/1/3/4/5/134577933/wewotadabutikitekika.pdfIn PDF document text
    • https://giwedogifuj.weebly.com/uploads/1/3/4/7/134741463/0cceea5.pdfIn PDF document text
    • https://wusedutewaxugag.weebly.com/uploads/1/3/1/4/131437839/tajabona-pipilewud-nubebeli.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gabatotudam.rf.gd/40002967295.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9b55efd-19b6-45c6-ae20-8c1c52101c7a/how_to_run_visual_basic_program_from_command_prompt.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/89ce7d46-e6e6-47c6-b160-d4c6815c6e9d/how_to_open_lexus_is250_door_with_key.pdfIn PDF document text
    • https://s3.amazonaws.com/julaxel/best_cover_letter_template.pdfIn PDF document text
    • http://jalovunenenema.epizy.com/gewet.pdfIn PDF document text
    • https://s3.amazonaws.com/mupukesunobaga/what_is_john_locke_philosophy.pdfIn PDF document text
    • http://zuvaxideta.rf.gd/buwujirulovukusa.pdfIn PDF document text
    • https://s3.amazonaws.com/fizufapu/donuridawovakawen.pdfIn PDF document text
    • http://damedosa.rf.gd/dutikeduxajukerew.pdfIn PDF document text
    • https://s3.amazonaws.com/bogijexu/10166290733.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6029589-1637-4bea-965b-d3fd6815a668/hp_m1522nf_scanner_not_working_windows_10.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/597dc39f-4612-41da-bd70-26777b0ba05b/xorozivavagenijakax.pdfIn PDF document text
    • http://lejuwugumiwa.epizy.com/project_risk_log_template_excel.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_off0000ee05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE05 5340 bytes
SHA-256: 3c2d3086536c70129f2185576f31aaee00076a869c42781d04e133d69a86d809
font_01_sfnt_off00010020.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10020 10636 bytes
SHA-256: 7b6a8f2c92ba84384e26a3ae6041adf6471aa089e11552f7970ddc391fcfe273

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