Malicious PDF — malware analysis report

Static analysis result for SHA-256 9eabd585b36ce2a3…

MALICIOUS

PDF

89.9 KB Created: 2021-03-10 16:06:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: c4abe210e2a70808f8405384e03e8b44 SHA-1: 1e2fcf0f46785ac696f1e1c26bdf0951362ac82c SHA-256: 9eabd585b36ce2a331ca822bc13a094f1127104a7d666c1a2744ee4872511eee
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to disposable domains and are likely used to host phishing content or distribute further malware. The document body, though heavily obfuscated, suggests a lure related to search terms, indicating a phishing or redirection attack.

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://zajinet.ru/wix?keyword=backyardigans+tyrone+voice PDF link annotation
    • http://zokidinodajives.getenjoyment.net/zanime.pdfIn PDF document text
    • http://tipofeliluget.medianewsonline.com/vurijegufukufetik.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369182/normal_5ffa9755ab9a6.pdfIn PDF document text
    • https://cdn.sqhk.co/vuranataxu/hd6ggid/1640995473.pdfIn PDF document text
    • https://cdn.sqhk.co/vomemubevu/fJQ69ig/wefisiseminijiruk.pdfIn PDF document text
    • http://fuvesozufinefi.medianewsonline.com/madomopopariw.pdfIn PDF document text
    • http://zuregazezoral.mygamesonline.org/bewop.pdfIn PDF document text
    • https://cdn.sqhk.co/sowodopevew/zzgiljd/stickman_fight_2_player_games_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/zanemulazif/jX7K3vO/87975171029.pdfIn PDF document text
    • https://finolija.weebly.com/uploads/1/3/4/6/134625313/2382539.pdfIn PDF document text
    • https://vetenejoxo.weebly.com/uploads/1/3/1/3/131379321/pigikukedutapat.pdfIn PDF document text
    • http://pagavopalubutu.scienceontheweb.net/movies_like_jack_reacher_never_go_back.pdfIn PDF document text
    • http://penageli.getenjoyment.net/mapa_mundo_fisico.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408582/normal_60271ac05c5ee.pdfIn PDF document text
    • https://cdn.sqhk.co/sewujuzanas/jAijiiI/russian_car_drift_apk.pdfIn PDF document text
    • http://rigoditibalun.mywebcommunity.org/why_are_the_van_der_waals_constants_a_and_b_different_for_each_gas.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kemaduxisi.epizy.com/36782540681.pdfIn PDF document text
    • http://satiruxusis.epizy.com/86833043937.pdfIn PDF document text
    • http://nibemodida.myartsonline.com/wunixosase.pdfIn PDF document text
    • http://panexorumilogim.myartsonline.com/getujar.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_off000124bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124BB 5348 bytes
SHA-256: 61ccb1294be3d84f030a3242f630c1373123d3b194f621d5c972c3dee9e34f10
font_01_sfnt_off0001370e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1370E 10408 bytes
SHA-256: 7bfe580ed3e7d17087ccbc4f43ebaa24a3bdde31f2d563d2eacf09ba2f148587

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