Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0456281f49467eb…

MALICIOUS

PDF

92.1 KB Created: 2021-05-12 06:47:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 8c92768e4870890f151812ee972df4b7 SHA-1: 9baf70cd983b9ba2bcf77f9e6bca4fbfe613755c SHA-256: f0456281f49467eb0b29782ae223cef7c545e2b408bc8db37339dc32ff8e8aac
126 Risk Score

Malware Insights

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

The PDF file contains multiple external URIs, with a primary focus on `https://jottigo.ru/strik?utm_term=why+is+there+no+water+in+my+dishwasher`. The heuristic `PDF_SEO_DISPOSABLE_LINK_FARM` indicates a pattern of using disposable hosting for link farms, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely involving the redirection to the aforementioned malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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://jottigo.ru/strik?utm_term=why+is+there+no+water+in+my+dishwasher PDF link annotation
    • https://cdn.sqhk.co/denirinodo/bjdggig/among_us_unblocked_for_school_online.pdfIn PDF document text
    • http://kpovli.ru/what_order_should_i_read_the_wizard_of_oz_booksh79rx.pdfIn PDF document text
    • http://woodbonus.net/harbor_breeze_remote_control_pairingtvvvj.pdfIn PDF document text
    • http://sebaxupakokak.22web.org/chuyn_t_file_nh_sang.pdfIn PDF document text
    • http://bazis-rostov.com/ib_visual_arts_comparative_study_samplepi9jw.pdfIn PDF document text
    • http://wowitaly.pro/zupozifuzidakiy3s.pdfIn PDF document text
    • https://cdn.sqhk.co/pesamelez/OjiieyJ/pajodazaxuwonolatakujor.pdfIn PDF document text
    • https://cdn.sqhk.co/xesofosirija/Iqihmge/cute_animals_coloring_book.pdfIn PDF document text
    • http://idealica-italiaofficial.site/244540260581phm0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/d0b56a9e-d928-4be8-9872-d4c183941ba7/central_pneumatic_29_gallon_air_compressor_reviews.pdfIn PDF document text
    • https://9462281c-6212-45c1-8f90-c4e3c363a226.filesusr.com/ugd/007d40_03134d7f78354eb29ccee6d1953abeb1.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/davolazupivowi/51381520681.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17f96f55-4798-43ed-9a2a-8a7a49426850/what_is_a_callus_on_the_foot_that_hurts.pdfIn PDF document text
    • https://s3.amazonaws.com/dudujopixejikug/can_you_watch_twilight_zone_on_netflix.pdfIn PDF document text
    • https://67d298e0-85f4-4ad4-bf36-e1ac857e42fc.filesusr.com/ugd/b6bf5b_3dcdd79786b046469351d1d41c28762a.pdf?index=trueIn PDF document text
    • http://xinasewaja.epizy.com/laxarerelowinilos.pdfIn PDF document text
    • https://d5bea983-5bca-41ba-aae6-6b688785cc77.filesusr.com/ugd/9ec29b_2b829030b1db46769938080264c5bec2.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kakekojezutok/96922040268.pdfIn PDF document text
    • https://96a9e3af-f0c3-4048-9e6c-0ad8da3c6018.filesusr.com/ugd/15d534_857e48e3b02d47949b467c102af8255a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/ginutu/android_studio_remove_title_bar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/25df7958-ede0-455b-ab86-e8d22f193cd2/norcold_fridge_not_cooling.pdfIn PDF document text
    • https://s3.amazonaws.com/tinezedu/mentalist_season_5_episode_15.pdfIn PDF document text
    • http://pamilov.epizy.com/jotolagujifa.pdfIn PDF document text
    • http://figezevaju.rf.gd/rekejekerewimak.pdfIn PDF document text
    • https://e5b7f393-9b83-42c5-a877-5b85c0c772c8.filesusr.com/ugd/77b42d_f99f32169fbf414b9693a285a88729f5.pdf?index=trueIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011ded.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DED 5028 bytes
SHA-256: 51794c95e5467df1a068694b4306e8289d1863db92046c6223db000592bd477a
font_01_sfnt_off00012ee3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EE3 11276 bytes
SHA-256: 9577410e61143fefed9ac22104d024d2191ca52cec5dbe706f5ec539b2f4bf42
font_02_sfnt_off0001547b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1547B 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361