Malicious PDF — malware analysis report

Static analysis result for SHA-256 8260cf3500c2ca17…

MALICIOUS

PDF

86.0 KB Created: 2021-05-14 00:04:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 039894e0c759bcd5c81ced4c561d30df SHA-1: 2cb708985fd45f060a452a923ad39a581c1885c3 SHA-256: 8260cf3500c2ca17e7ccc23a7cc0807fb56bb432ea14df7d6bf964903eeefd22
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains numerous links, including one to 'resalured.ru', which is likely part of a lure to redirect users to malicious content. The document body, though heavily obfuscated, suggests a pretext related to changing display names on a Panasonic device, aiming to trick users into clicking the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://resalured.ru/strik?utm_term=how+to+change+display+name+on+panasonic+kx-dt543 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4489848/normal_6066ac619df45.pdfIn PDF document text
    • http://depusapo.mypressonline.com/dakisanipureruvunutemuza.pdfIn PDF document text
    • https://woduluzotuni.weebly.com/uploads/1/3/4/3/134373450/c4a659c47d3b5b6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413712/normal_6043362583768.pdfIn PDF document text
    • https://boxavukexuzar.weebly.com/uploads/1/3/0/7/130775797/fe5159d69b6f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458421/normal_606e86a8ecead.pdfIn PDF document text
    • https://xevekefipozi.weebly.com/uploads/1/3/1/4/131406281/f8469ecfdd83.pdfIn PDF document text
    • https://cdn.sqhk.co/fomiroza/daigjbt/60418686221.pdfIn PDF document text
    • https://cdn.sqhk.co/pijajawopoji/F5Z0agj/regovigugakudo.pdfIn PDF document text
    • https://cdn.sqhk.co/jerowerar/jftiaje/jufedexuzivujekuzuw.pdfIn PDF document text
    • http://bajoreto.sportsontheweb.net/lumitovadumawewisoj.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477630/normal_60036f1128d47.pdfIn PDF document text
    • https://cdn.sqhk.co/linerutinew/hUhahfH/6921015204.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392862/normal_600f3d6e753f2.pdfIn PDF document text
    • https://davixiwawelugez.weebly.com/uploads/1/3/4/1/134133028/bujif_riguzaxa_wosurabufikexa.pdfIn PDF document text
    • http://zubudiru.sportsontheweb.net/water_pollution_causes_effects_and_solutions.pdfIn PDF document text
    • http://rovanenafet.getenjoyment.net/ubqari_magazine_december_2020_download.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://3df016ad-b40f-424f-9918-b96c60f46212.filesusr.com/ugd/387bfe_5b49c1e468e740bfa3ff22f81ae3a57a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/muvarelo/how_to_use_a_quote_for_a_topic_sentence_dbq.pdfIn PDF document text
    • https://74fc1a11-d445-4ffb-bc6b-7a79e5a65a18.filesusr.com/ugd/097bd5_c93858c4f68b4cb9a059715d34d4584c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bezutu/bhartacha_ghatnakar_song_dj_king.pdfIn PDF document text
    • https://s3.amazonaws.com/zuponefi/weight_lifting_workout_chart_template.pdfIn PDF document text
    • https://s3.amazonaws.com/fasudikek/qualities_of_good_scientific_writing.pdfIn PDF document text
    • http://vogapodidojuguf.myartsonline.com/gopal_and_co_telugu_calendar_2020_download.pdfIn PDF document text
    • https://s3.amazonaws.com/nosepevozux/hp_battery_not_charging_windows_10.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_off00010f05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F05 6084 bytes
SHA-256: 2a76a9365d647730d4b138d7924d8d8876cf3e8f352fa20520d4bfb5755981ff
font_01_sfnt_off000123ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123CA 11252 bytes
SHA-256: fca246559eded4354df53c26c3be36f8f0fc8a19c00efb6351e9513c72e52a8d