Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e59018f8cf08bc5…

MALICIOUS

PDF

80.7 KB Created: 2021-03-15 07:50:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 799046720764a7cac7f7012e0cca6f93 SHA-1: 528f74224e947054c1500d155a10607ae4911f31 SHA-256: 1e59018f8cf08bc59df1ca438b537eff27f6ec948b59f9c360b7b28442382876
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 0.9994

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://midufefew.ru/strik?utm_term=what+is+my+greatest+fear+poem PDF link annotation
    • http://sopidemeleket.mygamesonline.org/94317527574.pdfIn PDF document text
    • http://ladebizelase.scienceontheweb.net/aurelia_js_tutorial.pdfIn PDF document text
    • https://jarurozo.weebly.com/uploads/1/3/5/3/135320013/1ce73a27.pdfIn PDF document text
    • http://jirenaxapibetig.scienceontheweb.net/xazobomubuxamiwuwirigenuw.pdfIn PDF document text
    • https://komomagifagele.weebly.com/uploads/1/3/4/7/134705279/686fc3a9781891.pdfIn PDF document text
    • http://propovar.ru/34751272914xoc7l.pdfIn PDF document text
    • http://creamwalls.space/did_spectrum_drop_the_cw_channelnmu9b.pdfIn PDF document text
    • http://copyright-security-ig.com/configuracion_enrutador_wifi_apksaf0r.pdfIn PDF document text
    • http://haifaiv.ru/wosisuret1wdon.pdfIn PDF document text
    • http://likedizar.medianewsonline.com/charlie_and_the_chocolate_factory_squirrels_behind_the_scenes.pdfIn PDF document text
    • http://gejedesoni.getenjoyment.net/zudofumufosatenutil.pdfIn PDF document text
    • http://gojavodevagajuw.mygamesonline.org/can_you_remarry_after_divorce_scripture.pdfIn PDF document text
    • http://usersdeviceprotectionservice.site/22240980694bqg3b.pdfIn PDF document text
    • http://pugisapi.mypressonline.com/ping_pong_classes_nyc.pdfIn PDF document text
    • http://zitupow.medianewsonline.com/mutelukigupeb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://acaa17bf-cf2e-4132-a9e9-810271eb8bc4.filesusr.com/ugd/ab5b4c_afb63278f54b4906a525af641186a6a6.pdf?index=trueIn PDF document text
    • https://f803bf1b-e1c2-47f6-a41f-c9785c88fbd4.filesusr.com/ugd/bf07b1_7808831ed4cf44e585b5fb7b0efb4a0b.pdf?index=trueIn PDF document text
    • http://bumurulepowele.myartsonline.com/3172144710.pdfIn PDF document text
    • http://sajoveguduv.onlinewebshop.net/48101006174.pdfIn PDF document text
    • http://zogadawedalifap.onlinewebshop.net/model_airplane_news_june_2020.pdfIn PDF document text
    • https://3f740848-0e57-4b51-8596-564812021bec.filesusr.com/ugd/cbe17c_1d66a51a16804e4cb6d75e75e80f3637.pdf?index=trueIn PDF document text
    • https://e97408dc-4b05-4e3b-9f19-f4127feb49ef.filesusr.com/ugd/a42eed_977f8fcd1560418fb37559b72abeebda.pdf?index=trueIn PDF document text
    • http://bifovigavij.myartsonline.com/is_there_a_movie_for_the_book_series_the_selection_by_kiera_cass.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_off0000fdd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDD8 5396 bytes
SHA-256: 8c17d255efa0576748166835845bdf4a649f09c7f17cd349a804ec8e2a83fbe4
font_01_sfnt_off00011022.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11022 10996 bytes
SHA-256: a6e54977926ddfe2a5d90088db262c6a1870a7483adf155cc527b1e3da84349c

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