Malicious PDF — malware analysis report

Static analysis result for SHA-256 9aa8342fa6b46d6b…

MALICIOUS

PDF

94.9 KB Created: 2021-02-26 16:03:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 26df85a0667c47dfe250ec5916b21564 SHA-1: f8ac0505af4c63996b9962648746847ead424fde SHA-256: 9aa8342fa6b46d6b9f6f16bc7fbe4b321fb63f5442386928fdac6ca376c8e26c
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with several pointing to suspicious domains and one identified as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the PDF structure itself is designed to redirect users to external, potentially harmful, websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jumiwimov.ru/strik?utm_term=digitech+vocal+300+manual PDF link annotation
    • https://cdn.sqhk.co/gefimiwotux/NTjakgh/contacts_widget_pro_apk.pdfIn PDF document text
    • http://wekabamile.22web.org/ponobadolovepezorur.pdfIn PDF document text
    • https://cdn.sqhk.co/zubixola/hNpggYV/used_cnc_machines_for_sale_by_owner.pdfIn PDF document text
    • http://ligugiban.scienceontheweb.net/amcharts_legend_marker_size.pdfIn PDF document text
    • https://cdn.sqhk.co/maxevurux/VJidKii/52923103819.pdfIn PDF document text
    • http://lunatan.medianewsonline.com/jilenuze.pdfIn PDF document text
    • http://xuvaxujogilo.mygamesonline.org/shakespeare_sonnet_29_explained.pdfIn PDF document text
    • https://cdn.sqhk.co/metexemoraga/SGdicSP/muslim_daycares_near_me.pdfIn PDF document text
    • http://ninavadilu.22web.org/44436048570.pdfIn PDF document text
    • http://loduwij.scienceontheweb.net/guramebuxadosodipowutu.pdfIn PDF document text
    • https://cdn.sqhk.co/divoxisig/hktMcjb/digimel.pdfIn PDF document text
    • https://cdn.sqhk.co/zubavagi/0aKoaig/slit_meaning_in_english.pdfIn PDF document text
    • http://gijutudubesakuz.iblogger.org/hotel_booking_form_template.pdfIn PDF document text
    • https://cdn.sqhk.co/lituxopevuk/uJhji9Q/breaker_balls_game.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tozurome.epizy.com/makubovo.pdfIn PDF document text
    • http://jipokogave.epizy.com/how_long_do_you_have_to_pay_a_parking_ticket_in_california.pdfIn PDF document text
    • http://mugijuzes.epizy.com/maytag_bravos_mct_washer_error_codes.pdfIn PDF document text
    • http://sipanokule.onlinewebshop.net/craftsman_garage_opener_learn_button.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000115ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115FF 10224 bytes
SHA-256: 61aabafddc41050ef4f57bbab37e9ec4850251b9074650ad6db6b7d430118a7b
font_01_sfnt_off00013683.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13683 5304 bytes
SHA-256: 302b54b58dbd37e97af230d71ce7f77083bb5937e1bf2be862381e6c4754ede4
font_02_sfnt_off0001487f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1487F 11348 bytes
SHA-256: 772cb52da60bc03b8b7509831e187ebd0dec8f7a98c15560be09a44c64a4b393

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