Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ce4d28b3afb77e1…

MALICIOUS

PDF

79.1 KB Created: 2021-06-09 01:19:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: d2ca7ea05d85e0343403902bca796f51 SHA-1: 1825fba9a6e42493a658bb5b5a22cacc8e5d69dd SHA-256: 3ce4d28b3afb77e12361d703f9a5642bb55c90c99c3111b88c66109fcb93a284
126 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

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://drafthe.ru/pbw?utm_term=new+supply+narcissist PDF link annotation
    • https://feditesar.weebly.com/uploads/1/3/1/4/131483001/5304467.pdfIn PDF document text
    • https://tafevivif.weebly.com/uploads/1/3/2/6/132682704/kijigezuwe.pdfIn PDF document text
    • https://lonamejekewow.weebly.com/uploads/1/3/5/3/135396766/a08880ac5d9d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420431/normal_5fc695ba4a3d0.pdfIn PDF document text
    • https://nirefuriwubava.weebly.com/uploads/1/3/1/6/131637308/kazoruvamabow.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4498893/normal_6038c25aab64e.pdfIn PDF document text
    • https://lutaxebibutemun.weebly.com/uploads/1/3/1/3/131380730/pimuno.pdfIn PDF document text
    • https://makurabun.weebly.com/uploads/1/3/4/6/134651698/3f2e9153204.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459470/normal_605c692c97fc9.pdfIn PDF document text
    • https://susuravi.weebly.com/uploads/1/3/1/1/131164319/motuxasevuduv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446035/normal_6044a9f36a1aa.pdfIn PDF document text
    • https://sifivuvowebi.weebly.com/uploads/1/3/4/3/134316435/fuvakevanuvinin.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f00d824-70de-4510-8063-3445db75e530/what_does_it_mean_when_you_feel_drawn_to_the_moon.pdfIn PDF document text
    • http://gomedaj.pbworks.com/w/file/fetch/144897681/big_nate_blasts_off_online.pdfIn PDF document text
    • http://vowijeve.pbworks.com/w/file/fetch/144899583/fenonewafofab.pdfIn PDF document text
    • http://sufizilofab.pbworks.com/w/file/fetch/144526110/in_spite_of_despite_although.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83fa2214-50a5-4df1-b77b-414f0bee5692/vejonavupunasomajo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d000c37-fd4c-4807-b6b7-24e1fe9e941c/sunegakukuxivigidaru.pdfIn PDF document text
    • http://nugurafuge.pbworks.com/w/file/fetch/144695694/what_are_the_steps_in_the_research_process_brainly.pdfIn PDF document text
    • http://jajisaparev.pbworks.com/f/para_que_sirve_el_te_de_manzanilla_con_limon.pdfIn PDF document text
    • http://xorunezagu.pbworks.com/w/file/fetch/144460890/85674600594.pdfIn PDF document text
    • http://pikalunik.pbworks.com/w/file/fetch/144707817/hotel_rwanda_full_movie_download_in_hindi_300mb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e0de0fa-e676-4d71-b0ea-a91d89f4d65b/what_are_the_rules_of_21_in_basketball.pdfIn PDF document text
    • http://pigedigasexu.pbworks.com/w/file/fetch/144512001/ludovico_einaudi_experience_piano.pdfIn PDF document text
    • http://mojuseraneno.pbworks.com/w/file/fetch/144726219/best_srs_surgeons_in_the_world_reddit.pdfIn PDF document text
    • http://tusoxefum.pbworks.com/w/file/fetch/144902802/johnny_upgrade_2_cool_math.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_off0000f7df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7DF 5092 bytes
SHA-256: 94e1eeeef72569832614ba8f553ad6cc949826e5598a527e1e8171536ba09841
font_01_sfnt_off0001095b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1095B 10484 bytes
SHA-256: 9fd919e6ac74a297fde283dba09ccedca5422263ee003478b987c62bc14362a0