Malicious PDF — malware analysis report

Static analysis result for SHA-256 6868e0ae07e1cbdb…

MALICIOUS

PDF

64.9 KB Created: 2021-02-24 07:44:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: b4e03564800ccea9d5e0e36f920ae978 SHA-1: 249f3bb45020fe1ca33f8929a1dc912b9bbc43b0 SHA-256: 6868e0ae07e1cbdbfa022346c68136f7028721358dfdb819b5d5542abcc07ea1
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains multiple external URIs and is flagged by ClamAV as Pdf.Phishing.Trojan. The document body, though heavily obfuscated, references a 'Focusrite scarlett 2i2 firmware update' and includes a URL that appears to be a lure for this update. The presence of numerous disposable domains and link farm characteristics further supports a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://baarspo.ru/strik?utm_term=focusrite+scarlett+2i2+firmware+update PDF link annotation
    • http://frasqen.online/dnd_5e_trancecl6a4.pdfIn PDF document text
    • http://teplotronic.ru/who_is_entitled_to_maternity_allowanceb8ruq.pdfIn PDF document text
    • http://lolkek.xyz/90_dance_music_hits_philippinest9de9.pdfIn PDF document text
    • https://cdn.sqhk.co/rixutixim/ThjqhcQ/my_cloud_home_login_service_unavailable_mac.pdfIn PDF document text
    • http://vorecan.space/auto_air_conditioning_repair_near_me7mc5v.pdfIn PDF document text
    • http://sodahq.pro/yashica_mat_124g_220_filmad3aj.pdfIn PDF document text
    • http://supernefritroller.xyz/baby_boy_beautiful_photosikodk.pdfIn PDF document text
    • http://arm-watch3.club/69607126358e1tdt.pdfIn PDF document text
    • https://cdn.sqhk.co/xenudipu/geRpicd/streamlabs_change_profile_picture.pdfIn PDF document text
    • http://vitrinachel.ru/9601493201939q6v.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://doliwoxebokuk.rf.gd/76996412183.pdfIn PDF document text
    • http://pugavidugipiton.rf.gd/how_long_do_you_cook_turkey_wings_in_air_fryer.pdfIn PDF document text
    • http://wemiwapava.epizy.com/shrimad_bhagavad_gita_in_english.pdfIn PDF document text
    • http://faxumev.epizy.com/pevudikipetog.pdfIn PDF document text
    • http://desiwafinu.epizy.com/c_inheriting_from_a_template_class.pdfIn PDF document text
    • http://suvowafavij.epizy.com/operations_on_rational_numbers_worksheet_with_answers.pdfIn PDF document text
    • http://ralopokizuneza.rf.gd/canopus_advc_1000_manual.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_off0000c0bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0BD 5480 bytes
SHA-256: 79889af2a4a967f622f4a5b5534a78751ce93da7dd484e88187e96b5acbe63f0
font_01_sfnt_off0000d366.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD366 10224 bytes
SHA-256: 8a11664be60ed96605e3aa8f681b41561777f919c20b028e898d85ab6bfcd430

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