Malicious PDF — malware analysis report

Static analysis result for SHA-256 e717701cb5a3a1ab…

MALICIOUS

PDF

84.0 KB Created: 2021-03-29 18:04:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 56385ee6a02483b1824481245b4770e3 SHA-1: 80aaac860e11bf688920809f4e778ab5d749d045 SHA-256: e717701cb5a3a1ab795bc2ddf3f4bc1016482be06f12490b21acae7076a08288
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable domains and are associated with link farms, suggesting a phishing or malicious redirection scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were extracted, the presence of multiple suspicious URLs and the document's deceptive content point towards an attempt to trick users into visiting harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://nipisod.ru/strik?utm_term=pl+sql+interview+questions+and+answers+for+10%252B+experience PDF link annotation
    • http://nibajafij.medianewsonline.com/fraud_investigator_salary_uk.pdfIn PDF document text
    • http://xawegap.mywebcommunity.org/apush_period_4_review.pdfIn PDF document text
    • http://pupigojoniru.mypressonline.com/gapupofozonepik.pdfIn PDF document text
    • http://ita-fitness.fun/ruremunosukufexodaxumbdsxx.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478125/normal_5fd2d87de0020.pdfIn PDF document text
    • http://kpupnov.pro/motorola_sb6121_issuesr1csq.pdfIn PDF document text
    • http://witikotuxigere.scienceontheweb.net/xutemerupakiguf.pdfIn PDF document text
    • http://gisujug.mypressonline.com/nodixowa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386330/normal_604f47db405f7.pdfIn PDF document text
    • http://myirn.icu/panasonic_kx-tgc220es_cordless_phone5zxmb.pdfIn PDF document text
    • http://riniwovefaraw.22web.org/fobotakikiji.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://467375c7-a7a6-4806-a9b7-892c2a528f89.filesusr.com/ugd/911174_941eb445ec684fa3ba22fe80da599248.pdf?index=trueIn PDF document text
    • http://fikelamizogu.myartsonline.com/english_to_bengali_dictionary_free_download_full_version.pdfIn PDF document text
    • https://61069a5e-3c5f-4884-a3c7-8c7552058b74.filesusr.com/ugd/0789d5_1d8c44319b4f4b2f931f14c2a159d28d.pdf?index=trueIn PDF document text
    • http://wudazebej.atwebpages.com/courtesy_call_letter.pdfIn PDF document text
    • http://dakafatuvuguviz.atwebpages.com/94883466387.pdfIn PDF document text
    • http://petojijoxura.onlinewebshop.net/how_do_i_change_my_g_shock_battery.pdfIn PDF document text
    • http://moseligukunevuz.epizy.com/the_stand_1994_miniseries.pdfIn PDF document text
    • http://duwosemomim.epizy.com/how_to_make_paper_from_waste_paper.pdfIn PDF document text
    • https://8e12fe21-47c1-448c-af9e-883e7c84523b.filesusr.com/ugd/52ac5e_a6163f795b5447d2ad1daf2616af31fe.pdf?index=trueIn PDF document text
    • https://bb74f61c-7045-47bf-9a7e-968101ee373e.filesusr.com/ugd/81ef4b_9b6afd1b4cf347a2b9f5884439339f09.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_off00010b3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B3D 5692 bytes
SHA-256: b9fac92eb8dfe8786ac3f391a8711578dab0b6ed4c5b3ce97433d32eb7298360
font_01_sfnt_off00011ec7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EC7 10824 bytes
SHA-256: 256e624cfe1567f3d541cabe524138f735bd08849077dadc041923ce1b629889

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