Malicious PDF — malware analysis report

Static analysis result for SHA-256 936e5dcc36489879…

MALICIOUS

PDF

76.1 KB Created: 2021-03-17 21:07:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 2344a0f4ae53294bf9d24cf22c0405f7 SHA-1: 98e31beff2a386f94aebb1159589977f5238171d SHA-256: 936e5dcc3648987941d4377ec857d58d1cc86d9cdbdd22ea0df352fcdd916010
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://jumiwimov.ru/strik?utm_term=samples+of+intercessory+prayers PDF link annotation
    • http://rezltml.xyz/island_adventures_whale_watching_anacortes8iqgx.pdfIn PDF document text
    • http://rentline.pro/yes_please_meals7kkka.pdfIn PDF document text
    • http://microbladingcertificationdfw.org/gta_san_andreas_trkiye_modu_tam_indirgj7hn.pdfIn PDF document text
    • https://cdn.sqhk.co/zifeduwa/ii1ghus/wavaxar.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371808/normal_60281b83d368a.pdfIn PDF document text
    • http://supernefritroller.xyz/vizio_sound_bar_vsb200_priceuiav4.pdfIn PDF document text
    • http://kerubidezarido.iblogger.org/68122340551.pdfIn PDF document text
    • http://jajuviramigawo.medianewsonline.com/why_is_my_controller_flashing_white.pdfIn PDF document text
    • http://fidafevemikiwe.mywebcommunity.org/sefebolisawifiwit.pdfIn PDF document text
    • https://cdn.sqhk.co/givogaduta/tigjhEA/multi_strike_super_times_pay_video_poker.pdfIn PDF document text
    • https://cdn.sqhk.co/rupelesegeb/5Vhg14G/supply_chain_logistics_management_bowersox.pdfIn PDF document text
    • https://cdn.sqhk.co/xidizizo/biidge8/the_everything_learning_spanish_book.pdfIn PDF document text
    • http://niruteluw.22web.org/september_2020_printable_calendar.pdfIn PDF document text
    • http://raguvigawak.mypressonline.com/zolokukijanat.pdfIn PDF document text
    • https://cdn.sqhk.co/kenujowemi/heK82gi/jixovuvomonase.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446260/normal_60459d1e27ad7.pdfIn PDF document text
    • http://fanilobepewe.sportsontheweb.net/55178366999.pdfIn PDF document text
    • http://mavaxur.mywebcommunity.org/sisigutawek.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gekomulo.rf.gd/79629153195.pdfIn PDF document text
    • http://desejole.myartsonline.com/railway_budget_2020_download.pdfIn PDF document text
    • http://xuxerutiwuv.onlinewebshop.net/21124455177.pdfIn PDF document text
    • http://tuvilijemuze.epizy.com/dofufode.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_off0000edce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDCE 5364 bytes
SHA-256: f9557ff44fceb18592d610791f0a101b05d8bddb05a77463c4a55f8e235932b0
font_01_sfnt_off0000ffff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFFF 9952 bytes
SHA-256: 287a1ddcaa96653535987983d4a9a4e6bd06dd8527373127755fa63acf523369

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