Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2a119199996b306…

MALICIOUS

PDF

96.2 KB Created: 2021-03-27 22:05:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: d6dac409699eb39d3bc4aef64675379a SHA-1: 4b82e07e87a8ac42dcdffd9d218df6852d8a5ca2 SHA-256: a2a119199996b3069c22503e121f901bd779d0ca4e5d50953e33d814a5614091
126 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, with one specifically identified as a link farm on disposable hosting, suggesting a phishing or malware distribution lure. The document body, though heavily obfuscated, contains text that appears to be a keyword search term, further supporting the lure hypothesis.

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/award?keyword=bloqueo+av+3er+grado+pdf PDF link annotation
    • http://tronreserve.online/crystal_reports_2016_case_statement_multiple_valuesdswgv.pdfIn PDF document text
    • http://naropiwazufilu.22web.org/figuring_out_percentages_worksheet.pdfIn PDF document text
    • http://bemuwojozupujug.iblogger.org/easa_module_08_basic_aerodynamics.pdfIn PDF document text
    • http://autoupgrade.website/desifotokudevderl.pdfIn PDF document text
    • http://lnstagramcopyrightservices.org/100_dollar_startup78u6s.pdfIn PDF document text
    • http://kubifadim.iblogger.org/83924170094.pdfIn PDF document text
    • http://ziduzuraxiralet.iblogger.org/convert_microsoft_word_to_adobe_online.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zemagarekerak.epizy.com/peverizojoleribegitemaka.pdfIn PDF document text
    • https://s3.amazonaws.com/kovibu/zewemonibezow.pdfIn PDF document text
    • https://5c90cfa9-af55-48e2-9430-1f3580382729.filesusr.com/ugd/e2b09b_57eeb31694274b2e926cd8a3c48b3179.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sesijesule/snow_white_with_the_red_hair_episode_13_facebook.pdfIn PDF document text
    • http://sirilamezowi.epizy.com/embed_ssrs_report_in_email_body.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7322bfb-93b5-4d16-a323-c87cdb7f8023/javozeze.pdfIn PDF document text
    • https://fecd0c08-032d-4b8b-b26c-6108aca7a00f.filesusr.com/ugd/a87c8b_5bd3ad8185cc42eeb765ff5753ec6796.pdf?index=trueIn PDF document text
    • https://276658a2-c6b1-4a23-bc3b-56c82bce4278.filesusr.com/ugd/f9448a_d2b1e5fb4215400387de2ebe4f0e71ee.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/muxozuvalubi/agatha_christies_poirot_season_10_episode_1_cast.pdfIn PDF document text
    • https://30fe55a9-f0c7-4aec-9bf5-b9d2225d99a8.filesusr.com/ugd/c4a51e_5670db1190214119acab5754effea72e.pdf?index=trueIn PDF document text
    • http://domozutelopo.rf.gd/54194220875.pdfIn PDF document text
    • https://s3.amazonaws.com/gizonukorad/viginos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e5a2c71-64e1-40fc-b2f6-d16f412dc991/is_statistics_in_psychology_hard.pdfIn PDF document text
    • http://rulalovurodaf.epizy.com/lasko_22_inch_ceramic_tower_heater_walmart.pdfIn PDF document text
    • https://973697ad-ffa4-4f9d-85cd-0c9d1ea039ee.filesusr.com/ugd/5f5755_d99b098d10f2456481bbf00df0e5e3ba.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000138a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x138A8 5432 bytes
SHA-256: d08c3a0a334d451026e810a3e9493a8db679d2f83b298454b66a4e93e92a62db
font_01_sfnt_off00014b3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14B3F 12704 bytes
SHA-256: e0ebc0a6ac27a0270d66febe01cd1e823c0d0d01637094d292b38b3cef2280b2

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