Malicious PDF — malware analysis report

Static analysis result for SHA-256 5baabc0e018ea735…

MALICIOUS

PDF

78.3 KB Created: 2021-03-16 10:09:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 6d5de9f2bc941a0bb7057eb689d02cd3 SHA-1: 58a6869feff365324efe8a9eba7aa031fbd7c096 SHA-256: 5baabc0e018ea7351f60c196cdbe823bc80e3212a79800bc00cafafa7292adc3
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-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://seumenha.ru/strik?utm_term=harry+potter+half+blood+prince+book PDF link annotation
    • https://naxetiluwe.weebly.com/uploads/1/3/1/4/131483002/mediditepikid.pdfIn PDF document text
    • https://lajidusok.weebly.com/uploads/1/3/1/0/131070852/xagajaromuge.pdfIn PDF document text
    • https://kefomituwo.weebly.com/uploads/1/3/2/8/132815939/kafibofutaliri.pdfIn PDF document text
    • https://wegudogixudefup.weebly.com/uploads/1/3/1/4/131438345/1136561.pdfIn PDF document text
    • https://kigazodiraju.weebly.com/uploads/1/3/4/6/134678535/90b0e8548c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vitawijeroma.rf.gd/82827051018.pdfIn PDF document text
    • http://sekekubonigav.rf.gd/apache_storm_for_linux.pdfIn PDF document text
    • https://s3.amazonaws.com/wibedubosateg/the_secret_life_of_the_american_teenager_season_1_episode_2_online_free.pdfIn PDF document text
    • https://s3.amazonaws.com/redegelesibif/fancy_twice_piano_sheet_music.pdfIn PDF document text
    • http://mufuniwikolokil.epizy.com/sexidujodefa.pdfIn PDF document text
    • https://1afae0f6-9e35-4dc9-9db7-5dbf78511926.filesusr.com/ugd/afe78f_563d71e370b9449b8246828b036e4108.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/bfb4c12d-4499-4fa3-9cb8-917eb60bca42/shakespeare_hamlet_sonnet.pdfIn PDF document text
    • https://s3.amazonaws.com/gaxuremewuger/dairy_farmers_of_wisconsin_annual_report.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/08ae1573-ca4c-4af6-aad2-e313b3edf2db/what_happens_if_you_fail_your_mos_school_usmc.pdfIn PDF document text
    • http://rarejis.epizy.com/bosque_seco_tropical_caracteristicas.pdfIn PDF document text
    • https://s3.amazonaws.com/salosibejodod/16984542983.pdfIn PDF document text
    • https://b6f97e74-198a-461d-a312-d71b9712332b.filesusr.com/ugd/a2d007_f6407accc5e641428c55b1e024271ff7.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b914def-ff57-4888-bc35-01d28d2ba047/7603245267.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ef6669c-d309-4510-9159-4731a906ac69/26348499299.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_off0000f468.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF468 5332 bytes
SHA-256: c554ca6fbeb75ebf319658a1b71e922792ed3da0dee57ad13875d57d48f0ddee
font_01_sfnt_off00010685.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10685 11064 bytes
SHA-256: e7412b08d165fbf4d6668482865b78813f84db57e84dc979aed48224b662a7db

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