Malicious PDF — malware analysis report

Static analysis result for SHA-256 58d0795a45e9dd39…

MALICIOUS

PDF

86.0 KB Created: 2021-05-09 04:59:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 4bc21a13578f56e114aa41a507bb68d2 SHA-1: e11e0788b4f5209963b73824c496f8f6d2329827 SHA-256: 58d0795a45e9dd3931b47d882543def027a0411cfbac53ba43c51be686944aad
186 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, many of which are hosted on disposable domains, indicating a link farm designed to manipulate search engine results. The document's content, though garbled, appears to be a lure related to connecting a Bluetooth speaker, directing users to malicious URLs. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://botokaw.ru/strik?utm_term=how+do+i+connect+my+onn+bluetooth+speaker PDF link annotation
    • http://kavelokafozi.medianewsonline.com/who_made_up_the_third_estate_in_france.pdfIn PDF document text
    • http://zesegalos.scienceontheweb.net/lowitiviragijuwigamol.pdfIn PDF document text
    • https://cdn.sqhk.co/vetelovube/sg4ahaP/nawonijenebugukipi.pdfIn PDF document text
    • http://znalomstvavip.site/rasobiteferegosivarhd25.pdfIn PDF document text
    • http://zomaragexavope.sportsontheweb.net/prepositions_of_place_exercises_upper_intermediate.pdfIn PDF document text
    • http://chambreapp.xyz/crystal_reports_for_visual_studio_2010_runtimeg2fzi.pdfIn PDF document text
    • http://budokudepa.scienceontheweb.net/historia_do_bumba_meu_boi.pdfIn PDF document text
    • http://mokugujumekov.sportsontheweb.net/tapamuwape.pdfIn PDF document text
    • https://cdn.sqhk.co/zijopenuxafi/VZgg5jc/a_history_of_southeast_asia_arthur_cotterell.pdfIn PDF document text
    • https://cdn.sqhk.co/piravasufinu/SYKmKgd/kill_the_director_lyrics.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/f3d45936-e42b-4445-b00e-308f527408c0/garmin_920xt_band_australia.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/582c1e88-c06f-472a-bfe2-7c0ae0665552/taylor_7517_digital_scale_battery_replacement.pdfIn PDF document text
    • https://62abf401-5fc9-4991-ac00-cb6a0c8cf8ec.filesusr.com/ugd/e4ff69_110c30e56b9145e496d806ef7c44344e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wotodedaruzuk/immortal_syndicate_guide_poe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a60cff79-b5db-402f-bcf7-1949ae16466e/south_carolina_dmv_permit_test_book.pdfIn PDF document text
    • https://s3.amazonaws.com/dixaleko/escape_room_enchambered_alone_together_answers.pdfIn PDF document text
    • https://09972071-4174-499b-90b1-de3619f59f53.filesusr.com/ugd/d1c05f_42ec514cc82046b7a0174d1f0c73b59f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/baposivarabuj/email_input_form_html5.pdfIn PDF document text
    • https://s3.amazonaws.com/sedowedi/3606434005.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/08bc9fae-3205-4e4a-9e8e-70b077a34473/is_facebook_marketplace_available_in_uk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c498b19-c335-481b-8185-7351f61aa0e1/78025062624.pdfIn PDF document text
    • https://67d298e0-85f4-4ad4-bf36-e1ac857e42fc.filesusr.com/ugd/b6bf5b_3e71f353e7004309a67625b00f12038d.pdf?index=trueIn 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_off000103af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103AF 5556 bytes
SHA-256: 4eb364fe3b78d10fd7618cb95a9626a9c0cef589db08affcd59134b60a3031aa
font_01_sfnt_off00011667.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11667 11088 bytes
SHA-256: 37328b9f7cfadf4a3dc6a3b31d0188f7d242ed128e37798966b44c535090e6eb
font_02_sfnt_off00013c3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C3F 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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