Malicious PDF — malware analysis report

Static analysis result for SHA-256 a97866dfc1437b8c…

MALICIOUS

PDF

73.0 KB Created: 2021-03-17 18:00:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: d3c6ac6d626c462583b26786f4b8714b SHA-1: cd5d89a8da178e839b1485c9d299c1c76f29b4e5 SHA-256: a97866dfc1437b8c4480f8cd50d653883d0d499e91d6995788c0f87c364d6e13
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 0.9996

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://xajibur.ru/strik?utm_term=the+taming+of+the+shrew+folger+edition+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4449629/normal_600237eae217c.pdfIn PDF document text
    • http://xejopegig.mypressonline.com/51086833150.pdfIn PDF document text
    • http://berkeciftci.net/how_long_is_training_for_navy_sealsnhl9q.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371495/normal_5fca262625d03.pdfIn PDF document text
    • http://bilet-pdd.site/lemokupominosrwcu.pdfIn PDF document text
    • http://strita.space/pibumitkf1m.pdfIn PDF document text
    • http://libuwapuvewipev.mywebcommunity.org/cyberpunk_red_classes.pdfIn PDF document text
    • http://reduslim-officialsite.site/how_do_you_find_the_square_root_on_a_ti-30x_iisegi58.pdfIn PDF document text
    • http://zokidinodajives.getenjoyment.net/basketball_ball_handling_drills.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478415/normal_6016363fd92f6.pdfIn PDF document text
    • http://delinapod.mypressonline.com/healthrider_h90t_treadmill_review.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426066/normal_602f7e59b5ebb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376120/normal_60114a32db108.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/midaguvimabof/de_cero_a_uno_completo_gratis.pdfIn PDF document text
    • http://piwakitidi.onlinewebshop.net/ledivabisodap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/047b1ac4-be09-470b-be42-d6bfe0202c30/farmall_super_m_parts_for_sale.pdfIn PDF document text
    • https://s3.amazonaws.com/jeponowon/7._snf_sosyal_bilgiler_test.pdfIn PDF document text
    • http://fojosotum.myartsonline.com/padma_bhushan_award_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2047bacd-91e9-4207-9779-0846a9c73b87/madenuvatisukevov.pdfIn PDF document text
    • https://s3.amazonaws.com/tiniruru/2012_dodge_charger_repair_manual.pdfIn PDF document text
    • http://widepidaba.atwebpages.com/schneider_electric_miniature_circuit_breaker_catalogue.pdfIn PDF document text
    • https://s3.amazonaws.com/mujevubutukoxu/91774029285.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

Related samples 6

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ddf6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDF6 5496 bytes
SHA-256: d0a5920cf699f56b520d259e3e955e73f48e1aa682497a717a8a635a3e752e13
font_01_sfnt_off0000f095.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF095 11544 bytes
SHA-256: 1571c4727bca04e1c6947af0a33a8a0a4978649ba8352bef9be4a32de95534ab

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