Malicious PDF — malware analysis report

Static analysis result for SHA-256 62d9b714c0ec4dc6…

MALICIOUS

PDF

82.8 KB Created: 2021-01-31 16:31:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 5bdcc4e21f9ec940e4b9db4834796acb SHA-1: 7d45d2dade086c2cddb39fb918d9f318bc91f104 SHA-256: 62d9b714c0ec4dc6030762e3096aa7e38bbdc5295724f4f3ef3eb656661ad80c
184 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs pointing to suspicious domains, flagged by heuristics as malicious redirectors and link farms. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to lure users to external, potentially harmful, content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/123?utm_term=visual+theology+study+guide In PDF document text
    • http://italiahot.fun/doulci_activator_v7.0_username_and_passwordwxxlz.pdfIn PDF document text
    • https://cdn.sqhk.co/keropolor/9ggjbhi/sivogolugoravusubipakusi.pdfIn PDF document text
    • https://cdn.sqhk.co/xekemini/9xIzwLv/fly_little_birdie.pdfIn PDF document text
    • http://3gusevshop.website/6747735807k3pnr.pdfIn PDF document text
    • https://cdn.sqhk.co/zosiwikiw/9NjjjiK/gmail_filter_calendar_notifications.pdfIn PDF document text
    • https://cdn.sqhk.co/jamolipa/6ajfjiF/1_clue_words_and_syllables_answers_level_13.pdfIn PDF document text
    • https://cdn.sqhk.co/dalegoti/aQddqha/outdoor_battery_christmas_lights_with_remote.pdfIn PDF document text
    • https://cdn.sqhk.co/fegujajox/gihbih4/76461986926.pdfIn PDF document text
    • http://lnstagaram-verifiedbadges-from.com/the_solitary_reaper_figures_of_speechwcbbc.pdfIn PDF document text
    • http://seedcraft.online/anveshi_jain_app_mod_apkjr1jf.pdfIn PDF document text
    • https://cdn.sqhk.co/sifalavuxozo/hiiiObu/goludezulo.pdfIn PDF document text
    • https://cdn.sqhk.co/rurokusulos/3jgXHQb/tuzoz.pdfIn PDF document text
    • http://interplast.ru/4581906036u0loh.pdfIn PDF document text
    • http://trastenmyqort.online/genajojezafijugirib09a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jovadoku.epizy.com/30283529716.pdfIn PDF document text
    • https://s3.amazonaws.com/likadojivivofu/47929220426.pdfIn PDF document text
    • https://s3.amazonaws.com/wavunot/86705808552.pdfIn PDF document text
    • https://s3.amazonaws.com/dubiditiginowo/taiwan_visa_application_form_south_africa.pdfIn PDF document text
    • https://s3.amazonaws.com/wesezuzuvalirik/addy_nagar_song_tinyjuke.pdfIn PDF document text
    • http://xizoxenefodage.epizy.com/25460834546.pdfIn PDF document text
    • http://forofadikov.rf.gd/emergency_services_worksheets_ks2.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_off0001091d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1091D 5056 bytes
SHA-256: d4c70c58586c63abacdec335052d6e8e6dea4ee4d3bc1b326ac579aff3cd87a0
font_01_sfnt_off00011a58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A58 10256 bytes
SHA-256: 11b4b7ee93d7da564470f0d1c0ad4b6f25d03dc8f389b24a309fcc4901fe4b80

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