Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ff1e98ec15ae1cb…

MALICIOUS

PDF

81.0 KB Created: 2021-03-04 16:45:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 34047173641419b2fc4723889535bc87 SHA-1: 9281a2b65c91ae24c28b4ee557f6e4e657a2af56 SHA-256: 5ff1e98ec15ae1cbe9f88c90e691a451bde1401d65904bc383abf3ba15fb06b2
126 Risk Score

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 0.9993

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://bologen.ru/strik?utm_term=dungeon+and+dragons+character+sheet+online PDF link annotation
    • https://cdn.sqhk.co/bojojiweg/cD9Qggs/turbocharged_cars_for_sale_south_africa.pdfIn PDF document text
    • https://cdn.sqhk.co/kigaratak/bJwtsYR/mimatolowunow.pdfIn PDF document text
    • http://ing-jobs-opportunities.com/masha_and_the_bear_toys_houseqkivk.pdfIn PDF document text
    • http://lamovingcompany.com/2241969528817oqy.pdfIn PDF document text
    • https://cdn.sqhk.co/judawube/m9gkejj/tornado_warning_maine_today.pdfIn PDF document text
    • https://cdn.sqhk.co/luwokiseg/fhfOjgu/60052508805.pdfIn PDF document text
    • http://verifybadgesbusiness.com/modulo_5_prepa_en_linea_sepw8ojn.pdfIn PDF document text
    • http://pojezer.iblogger.org/xobitinej.pdfIn PDF document text
    • https://cdn.sqhk.co/lazemowul/phd0TIT/xibevavunug.pdfIn PDF document text
    • https://cdn.sqhk.co/xedomobedusi/idptibk/wheels_on_bus_video.pdfIn PDF document text
    • http://roflan.site/voralgo7kq.pdfIn PDF document text
    • https://cdn.sqhk.co/sixojifez/jZjcjKr/fagilaberufipefofixofamak.pdfIn PDF document text
    • https://cdn.sqhk.co/keropolor/Rjehbij/13025547644.pdfIn PDF document text
    • http://pudobatawizubi.iblogger.org/mekelatufotej.pdfIn PDF document text
    • https://cdn.sqhk.co/bomumuxa/ii2Mjck/rejimewenawujogiwij.pdfIn PDF document text
    • https://cdn.sqhk.co/zimuteraf/cidVgjj/45246309512.pdfIn PDF document text
    • https://cdn.sqhk.co/zopizote/0ifgeVf/tajati.pdfIn PDF document text
    • http://nashremont.site/how_to_set_the_knobs_on_a_cobra_29_ltd_classic7tzsp.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://donenufalu.rf.gd/google_chrome_security_certificate_free.pdfIn PDF document text
    • https://s3.amazonaws.com/dukexajuj/44099837436.pdfIn PDF document text
    • http://jibogifimot.epizy.com/19577680192.pdfIn PDF document text
    • https://s3.amazonaws.com/vutame/slope_intercept_form_equation_maker.pdfIn PDF document text
    • http://rinexaxar.rf.gd/pearson_mymathlab_college_algebra_answers.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_off000100c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100C0 5200 bytes
SHA-256: 9b0e287ab78488d248b18097e4a7fa28458385b7cc473e74fa79a76190be831b
font_01_sfnt_off00011270.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11270 10476 bytes
SHA-256: 670db0c2dce5ea8f599892962b5251a128ac5c8f749db7faca4dd8de3f313733

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