Malicious PDF — malware analysis report

Static analysis result for SHA-256 0702100f199ac1a2…

MALICIOUS

PDF

78.6 KB Created: 2021-03-23 08:19:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: a3a2558f954b501ae0a6d5c408a08944 SHA-1: 722ef7c2b4672167bb489596879e57854e77a24d SHA-256: 0702100f199ac1a2d11ba97eba0416e11c88d028dbf79463108e3f72be726e6d
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://xajibur.ru/award?keyword=overtime+form+sample+pdf PDF link annotation
    • http://kirakexig.mypressonline.com/zelda_ocarina_of_time_3ds_guide.pdfIn PDF document text
    • https://dojinutek.weebly.com/uploads/1/3/4/1/134108596/metomobizoluso.pdfIn PDF document text
    • http://xefawojuj.mygamesonline.org/12th_zoology_practical_manual_2020.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476927/normal_5fd3107ca9912.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403283/normal_604ccbaf2cc72.pdfIn PDF document text
    • https://wokuzavewa.weebly.com/uploads/1/3/5/3/135339714/nifiki-sisizalemepew-tazokukozal-vabedakevivamin.pdfIn PDF document text
    • https://junurewumopu.weebly.com/uploads/1/3/2/7/132740614/mudored.pdfIn PDF document text
    • http://cccckkkkkdd.space/genie_model_2022_keypad_programming5wj8a.pdfIn PDF document text
    • https://siwelizotelet.weebly.com/uploads/1/3/1/4/131437983/marogep_lojizupisizex.pdfIn PDF document text
    • http://feyakast.online/the_mysterious_benedict_society_and_the_riddle_of_ages_wikipp12w.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/389bf491-7158-4feb-8cbb-1bc898f82fa1/beethoven_sonata_109_youtube.pdfIn PDF document text
    • https://s3.amazonaws.com/waxapoz/cisco_4331_router_datasheet.pdfIn PDF document text
    • https://s3.amazonaws.com/fizup/61003280176.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fbf0cdce-59bb-4057-8c68-d4c35269d331/what_does_it_mean_when_it_says_service_4wd.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/823d7501-76a0-4f93-b9ae-5f7e31d2344b/the_future_of_us_irwin_redlener.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ca47075-b257-4fe6-b322-89c0ce5cf4cc/vanewefazidupazuzerifug.pdfIn PDF document text
    • https://s3.amazonaws.com/solonebosop/how_much_money_do_automotive_technicians_make.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94a3b845-2893-48b5-a059-60f0708f0781/73966973995.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_off0000f7d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7D1 5272 bytes
SHA-256: 10a97cd86e00500deaf21a9ca201e38d016b35b321ec377f55c584aa303cc9a4
font_01_sfnt_off000109ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109AC 10496 bytes
SHA-256: cfdddf33f89539be0dd98d57504cd39fd53272085750480963665705a6394f04

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