Malicious PDF — malware analysis report

Static analysis result for SHA-256 978ae423c31ac3b1…

MALICIOUS

PDF

75.8 KB Created: 2021-03-19 16:43:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 3a3e86b2aa09d056f1ec29b1a1428a19 SHA-1: 194f6f0f99b4f11262de6293b5de093eb0b443d1 SHA-256: 978ae423c31ac3b1fb323874805b3d04e644eae804706dd017e3f0ec84dbc514
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains heuristics indicating it is a phishing lure, specifically using an image to redirect users to a malicious URL. The ML classifier and ClamAV detection strongly support this assessment. The embedded URL `https://jottigo.ru/wix?keyword=unblocked+arcade+games+online` is identified as the primary redirection target, likely leading to a phishing or malware distribution site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://jottigo.ru/wix?keyword=unblocked+arcade+games+online PDF link annotation
    • http://takipibimaxubov.sportsontheweb.net/best_reader_for_windows_10_laptop.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404980/normal_5fe8fda9b8e3d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465694/normal_603ebaea7c238.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403428/normal_603ae75d85d34.pdfIn PDF document text
    • https://wukarogokemek.weebly.com/uploads/1/3/0/7/130739107/suziw-fozizivivofuwen-gokapurebo-varesulodawo.pdfIn PDF document text
    • http://hackins.site/2010_camaro_ss_engine_bay_dress_up5zzfx.pdfIn PDF document text
    • http://xelasurugopu.mywebcommunity.org/twitter_sports_picks.pdfIn PDF document text
    • http://carinsusa.com/966911634763taix.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444369/normal_601d05446af2a.pdfIn PDF document text
    • http://powajaxib.medianewsonline.com/how_do_i_pair_my_costco_hearing_aids.pdfIn PDF document text
    • http://kirudikegopoded.sportsontheweb.net/rojano.pdfIn PDF document text
    • https://wimelavejitovuv.weebly.com/uploads/1/3/4/5/134597731/xelejakenasoz_musiduvekiw_liroxibepipesid_vavedifiro.pdfIn PDF document text
    • http://kikifikoxije.mypressonline.com/93370410435.pdfIn PDF document text
    • http://vivubowi.getenjoyment.net/80359887292.pdfIn PDF document text
    • http://ufenmac.com/d_d_3._5_shackled_city95z2i.pdfIn PDF document text
    • http://scm03.ru/deadlock_recovery_in_operating_system3h12z.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/xixonu/dengue_fever_treatment_guidelines_2017.pdfIn PDF document text
    • https://s3.amazonaws.com/sutawowirosuvuv/gopem.pdfIn PDF document text
    • http://sabixukavizom.myartsonline.com/benzi_desenate_in_romana.pdfIn PDF document text
    • http://xuvekixofeku.onlinewebshop.net/vurafiliwarerezepalixup.pdfIn PDF document text
    • https://s3.amazonaws.com/mokamoba/61778612550.pdfIn PDF document text
    • https://s3.amazonaws.com/pirosisob/burumigoruneg.pdfIn PDF document text
    • https://s3.amazonaws.com/widiku/championship_form_table_sports_mole.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_off0000eb40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB40 5456 bytes
SHA-256: d0ee79d756f1ab59355a6c3017f60b560db067386531e75571453afe144182de
font_01_sfnt_off0000fdb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDB7 10564 bytes
SHA-256: 3748c61455480a9affd3fd2ecd65ae6cbdecf0cb783e64f5a446231b748b755e

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