Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ea9b0fbe7c9bacf…

MALICIOUS

PDF

77.4 KB Created: 2021-03-10 16:47:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 04d7b800f26d730aeb614ba31fce995b SHA-1: ff6985fa8bb688544293b0a9266ba062deb2c68b SHA-256: 1ea9b0fbe7c9bacfe0c9e66c381f2609a3be77054b4dfd583c420504fd3ee467
126 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous external URIs, with one specifically pointing to 'jacksth.ru/award', suggesting a lure to a potentially malicious site. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports this by indicating the PDF is part of a link farm hosted on disposable domains, a common tactic for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://jacksth.ru/award?keyword=the+good+morrow+john+donne+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4484814/normal_5ff79a5eddc4c.pdfIn PDF document text
    • http://gukabibus.mygamesonline.org/kenmore_elite_washer_parts_canada.pdfIn PDF document text
    • http://jagodadexujuza.iblogger.org/47745488381.pdfIn PDF document text
    • http://xorabawik.medianewsonline.com/79081787670.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413712/normal_5fdb79202d17f.pdfIn PDF document text
    • http://terugate.mypressonline.com/9960329169.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458145/normal_5fd2a4d4d9b8a.pdfIn PDF document text
    • http://totumaxotudi.iblogger.org/57025147897.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481510/normal_603d262f3e667.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dujabonesisu.rf.gd/81430750558.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c6e6e74-9b1d-4023-94a4-c83617b1f52d/73342264512.pdfIn PDF document text
    • https://s3.amazonaws.com/nopomewegobij/sumoga.pdfIn PDF document text
    • http://gadazowowotogug.rf.gd/joking_hazard_rules_for_2_players.pdfIn PDF document text
    • http://boragilaz.rf.gd/100uf_16v_electrolytic_capacitor_datasheet.pdfIn PDF document text
    • http://dulefuzobov.rf.gd/cdl_test_in_spanish_texas.pdfIn PDF document text
    • http://tuxesoguzegisox.epizy.com/website_templates_design_free.pdfIn PDF document text
    • https://s3.amazonaws.com/wuniku/24565883303.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62d60718-8c06-4df1-b1fd-add8750c0d2f/inkscape_tutorials_for_beginners_vector.pdfIn PDF document text
    • http://bafuxinasu.epizy.com/vapuwofitusikuverirazeg.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/92a20ce4-786d-4b47-b50c-b48c67fdb321/taxunezotiv.pdfIn PDF document text
    • http://zaxuzut.atwebpages.com/fuguwev.pdfIn PDF document text
    • https://s3.amazonaws.com/nafoxuda/59238360267.pdfIn PDF document text
    • https://s3.amazonaws.com/lomogas/belogufejeta.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/786dc42f-2259-4347-94bb-72053154c166/how_to_refill_bostitch_stapler.pdfIn PDF document text
    • http://nuzabasere.rf.gd/vamutulolosabewabojudaza.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d88fc67c-bb0b-4467-9fdd-b7f6a25d8472/big_data_analysis_book.pdfIn PDF document text
    • http://difavaxegugadu.epizy.com/dream_interpretation_black_dog_biting_hand.pdfIn PDF document text
    • https://s3.amazonaws.com/mexesazaxasa/acrobat_reader_latest_version_free.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_off0000f3ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3AD 5152 bytes
SHA-256: 7ae26f499adb1bd5d97030dd2e582b670246b963ab12b7a589824e97ff8b67d0
font_01_sfnt_off00010524.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10524 10196 bytes
SHA-256: 68ed0e52181d52cdad5d5e720f944f503b2076c8edc9e8d5c3de6ae10b2e01b4