Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2705666467a6ae2…

MALICIOUS

PDF

81.3 KB Created: 2021-03-15 22:17:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: d8b87aa9b20b11d2f3adb6e3038f3364 SHA-1: 53c599b8ad21d5e6be6c89818d6d446ba0ac05ae SHA-256: b2705666467a6ae259f23037e0b2dc218cc64ab21873a5cf483c048f6d2fd5ae
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URIs, with one specifically pointing to a suspicious domain 'vilenefex.ru'. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect the user to a malicious site, potentially for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://vilenefex.ru/wix?keyword=the+lorax+play+script PDF link annotation
    • https://degevibuv.weebly.com/uploads/1/3/5/3/135316410/9373371.pdfIn PDF document text
    • https://cdn.sqhk.co/zekafomaze/TYKvha1/zamonepenimerowujoxewaz.pdfIn PDF document text
    • https://nafeziwubiwodi.weebly.com/uploads/1/3/1/3/131379183/dozod_bifamosun_dededixulaf_vikevape.pdfIn PDF document text
    • https://cdn.sqhk.co/menumuxod/bjaajeQ/fijopojugapezem.pdfIn PDF document text
    • http://dvestideyli.xyz/how_to_setup_my_brother_wireless_printer_to_my_mac2bpj1.pdfIn PDF document text
    • https://fofupapezu.weebly.com/uploads/1/3/4/3/134356394/porar_todagejore_vudinisirimefu_meputofuzosez.pdfIn PDF document text
    • http://oneitshop.pro/the_book_thief_ebook_download_epub9oish.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475203/normal_5fcfa7b5f397e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480595/normal_5fd901691d275.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387712/normal_6034774ad63d8.pdfIn PDF document text
    • https://cdn.sqhk.co/visevunu/8ihgiHh/chicken_running_without_head_youtube.pdfIn PDF document text
    • http://yildirimotobursa.com/sokevipediziwokomegoef99.pdfIn PDF document text
    • https://xadajosawot.weebly.com/uploads/1/3/1/6/131636584/9ecb9ceceb9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426260/normal_6031682ca04fe.pdfIn PDF document text
    • https://cdn.sqhk.co/temetixufuxi/igujaih/92837102854.pdfIn PDF document text
    • http://nabavawuzafurur.mygamesonline.org/bastar_university_supply_time_table_2020_download.pdfIn PDF document text
    • http://towufato.mywebcommunity.org/how_to_design_grade_slab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493245/normal_600afe943c076.pdfIn PDF document text
    • https://cdn.sqhk.co/fonixoligem/jghdjfl/transmute_galaxy_battle_apk.pdfIn PDF document text
    • http://imm-shoes2.club/setag21dnb.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/metakibeme/multiplying_and_dividing_decimals_by_powers_of_10_worksheet.pdfIn PDF document text
    • http://niwimugosaz.onlinewebshop.net/fidulofobodilogazep.pdfIn PDF document text
    • https://s3.amazonaws.com/ninazarila/80886178721.pdfIn PDF document text
    • https://s3.amazonaws.com/rakabexozu/zutawaxulapebonujute.pdfIn PDF document text
    • https://s3.amazonaws.com/zupenafud/bevobepanezeke.pdfIn PDF document text
    • http://jasunusemoki.onlinewebshop.net/el_saber_proscrito_alice_miller_download.pdfIn PDF document text
    • https://s3.amazonaws.com/tafogusegabomu/lord_i_need_you_chords.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_off00010101.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10101 5140 bytes
SHA-256: e03558de15fd4d444a2dd1704a86ded3d4a7caff6351d0faa469472b71ceba66
font_01_sfnt_off00011282.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11282 10904 bytes
SHA-256: 65b937a0af0f01fe398c4ae8b957dc92522335356ebff95ef950eda21d8eb31a