Malicious PDF — malware analysis report

Static analysis result for SHA-256 2519b680e4e51772…

MALICIOUS

PDF

73.2 KB Created: 2021-05-06 07:53:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 6944c09a66374fc016408fa4194a55cf SHA-1: 58ecc9201fb3d9629468f24f7d447bdbbd70e03a SHA-256: 2519b680e4e51772a716136ec18b5941755c66d0489877796cf5952352b4cb5f
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 0.9998

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 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://pelibifir.ru/strik?utm_term=how+to+open+lexus+with+dead+key+fob PDF link annotation
    • https://cdn.sqhk.co/sebutarukaw/XifTiYj/monster_truck_cake_pan_amazon.pdfIn PDF document text
    • http://fibubomalinod.22web.org/momebin.pdfIn PDF document text
    • http://hookup682.site/crystal_report_viewer_sap3viox.pdfIn PDF document text
    • https://cdn.sqhk.co/pananumujo/hwggXux/gudojadipi.pdfIn PDF document text
    • http://frukt.fun/renuworisadosuji64gxc.pdfIn PDF document text
    • http://autokenn.com/7442337644psegi.pdfIn PDF document text
    • http://matteset-spon.space/commentaries_on_living_krishnamurti9b6vs.pdfIn PDF document text
    • http://evgeniy-semenenko.ru/zojabudidojawaminit4e28.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://6131fb9f-3080-406c-a6ab-c4686b6a2f6f.filesusr.com/ugd/52be6f_2177c22a79a14a35a610672d28f650e2.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8f2bb2c-85f1-474e-aebe-d87b9b2cb9ff/maytag_2000_series_washer_lf_error_code.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c80f92c5-558a-4ae3-ac13-ba6233fac098/51847382474.pdfIn PDF document text
    • https://45180a89-8b92-4d54-a4c6-cdf0ad6af3c7.filesusr.com/ugd/2b98a3_66371ca1995544b289f44709ee666ecf.pdf?index=trueIn PDF document text
    • https://0e9c393c-9feb-4465-ae9d-4486bea7a644.filesusr.com/ugd/4b68be_6247ee7adcb44d8dbf3b14d52ff80397.pdf?index=trueIn PDF document text
    • https://504706c9-3a86-45eb-876a-6494ef133fff.filesusr.com/ugd/80c1db_06ac642a3e7e471788ddaff628739edc.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/707fc49b-3f80-4875-a651-41e000ffcfca/copleston_history_of_philosophy_9.pdfIn PDF document text
    • http://bobiwerebidil.rf.gd/what_are_5_love_language.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f1088dc-7d1a-4c28-b08e-b143538d8927/samsung_8000_series_refresh_rate.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea9fcbe8-c8e7-471a-9e3e-486d09c4b073/how_to_plant_vidalia_onion_bulbs.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_off0000ddff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDFF 5460 bytes
SHA-256: ff3730dbfdce3c5647e51d228714770b2cc2ea0938fafa47c8f3f43e78ff0e46
font_01_sfnt_off0000f0a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0A4 11024 bytes
SHA-256: f0a825aa0c435ba969f73f7b8fd41b47526e5b0bf824b1e4443f2ea6010023d4

Open this report in the interactive analyzer, or submit your own file for analysis.