Malicious PDF — malware analysis report

Static analysis result for SHA-256 0cfd165a69568591…

MALICIOUS

PDF

81.5 KB Created: 2021-04-10 13:44:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 6bc5f6c59e25acf9b60ed938987a19b1 SHA-1: 63fe8665164cd11ad12e8047c3b7eba04040c5b6 SHA-256: 0cfd165a695685912d0d12b772c5bb602e2e296febff7e53135f772ad4065ccb
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable hosting and are part of a link farm, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. The document body, though heavily obfuscated, contains text related to search queries, further supporting the lure of a search result page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://midufefew.ru/strik?utm_term=what+is+the+meaning+of+literary+works PDF link annotation
    • http://yildirimotobursa.com/kenmore_elite_he3t_washer_specs60uyy.pdfIn PDF document text
    • http://frontglass.xyz/lazojodijigidetuvunex6h67.pdfIn PDF document text
    • http://catsism.com/81435481344l47mn.pdfIn PDF document text
    • http://retys.space/samsung_rfg297hdrs_service_manualwrw4j.pdfIn PDF document text
    • https://cdn.sqhk.co/sodelaranu/fjjihhb/uphill_rush_6_unblocked_weebly.pdfIn PDF document text
    • http://generalmassage.online/lusosawijalamawuxufejugej0w1bx.pdfIn PDF document text
    • https://cdn.sqhk.co/fejavegiwo/igjjKM5/nexage.pdfIn PDF document text
    • https://lobuponumabezi.weebly.com/uploads/1/3/4/5/134508668/1196749.pdfIn PDF document text
    • https://wopokajam.weebly.com/uploads/1/3/0/8/130874492/9669590.pdfIn PDF document text
    • http://presentinsta.online/motederosesowijelyf0m.pdfIn PDF document text
    • https://ledijomunekivi.weebly.com/uploads/1/3/4/5/134584754/dijuxuzodilo-tuxuwabuxaxe-kezirulovorub-sodijek.pdfIn PDF document text
    • http://idealslimitalia-oficial.site/wikololojivobu0hb0x.pdfIn PDF document text
    • https://puwowuxavuz.weebly.com/uploads/1/3/2/6/132682233/wikub-fozabo-labaxedumo.pdfIn PDF document text
    • https://cdn.sqhk.co/munuluxel/kKKhcha/90169350665.pdfIn PDF document text
    • http://funseeds.site/jp_morgan_chase_bank_servicesknezu.pdfIn PDF document text
    • https://cdn.sqhk.co/gavezexu/jicjehi/download_army_clash_mod_apk_for_android.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/nuxomigo/45057253031.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a467bc9-da66-46eb-b805-b06382f20e16/polaris_3900_not_working.pdfIn PDF document text
    • https://s3.amazonaws.com/sojenozap/vpn_android_2._2.pdfIn PDF document text
    • https://s3.amazonaws.com/gajabedafot/angular_bootstrap_template_tutorial.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/34ea3150-6485-473a-9b19-b44118c844e2/centerpoint_4x32mm_illuminated_crossbow_scope_lc432erg2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/501dc750-e2f0-49c0-a868-06660b97f813/how_to_get_a_replacement_drivers_license_in_georgia.pdfIn PDF document text
    • https://s3.amazonaws.com/zibenoroduzuw/rubomimipugagej.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d65c3e18-016e-48ed-9658-5ff5f9f0a454/xukewojitave.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_off000101d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101D8 5452 bytes
SHA-256: a98a8492a54d1d147a617b81f5e6fda8fcd7c7633bfa6c14c81755ce2d326fb7
font_01_sfnt_off00011457.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11457 10532 bytes
SHA-256: 13c0ee563ad3ebe1a598bf1e72d0c689120baa9ae71927b783add8bcc64387fb

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