Malicious PDF — malware analysis report

Static analysis result for SHA-256 3736bb6177bd4aa0…

MALICIOUS

PDF

91.2 KB Created: 2021-03-31 05:56:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 38f4099fb38885ead980915b35cc0ac0 SHA-1: eeb96e93ed6f2dcead8762a6c7fcf380a9a4d8ab SHA-256: 3736bb6177bd4aa027c4ea529275c23720baa68df8ef0cffe80360a83299562c
186 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier. It contains a large number of embedded external links, many pointing to disposable domains, suggesting a link farm or phishing operation. One of the primary URLs extracted is https://mezovuduw.ru/wix?keyword=carrie+full+movie+online+free, which is likely used to redirect users to malicious content. The PDF structure and embedded links are consistent with techniques used to distribute malware or conduct phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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 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://mezovuduw.ru/wix?keyword=carrie+full+movie+online+free PDF link annotation
    • http://wufamega.scienceontheweb.net/automatic_transfer_switch_operation.pdfIn PDF document text
    • https://vikakexotokipo.weebly.com/uploads/1/3/0/9/130969200/tokojidewufotet_rinupif_ginunulajexarep_rubivixuf.pdfIn PDF document text
    • https://nalokulomegeze.weebly.com/uploads/1/3/4/7/134758193/3b282f3ed.pdfIn PDF document text
    • https://fawewetipe.weebly.com/uploads/1/3/1/3/131379545/1252308.pdfIn PDF document text
    • https://jutamuxenaritul.weebly.com/uploads/1/3/1/4/131452982/xoxumitaguvutel.pdfIn PDF document text
    • http://fajamad.mypressonline.com/3_bedroom_house_plans_and_designs.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/wefadep/81946119489.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f17ead0c-1c30-4730-82e5-914ea341ce00/pijerololabedakasifasim.pdfIn PDF document text
    • https://s3.amazonaws.com/kuxegu/ice_breaking_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/fonazuzixagizir/76072335557.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a641444c-002c-4535-b181-c061c3d6444f/how_to_compare_dish_network_packages.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/129a1eff-53b6-41f2-ad90-5f3ffb5722c6/71784888655.pdfIn PDF document text
    • https://s3.amazonaws.com/bejenosugede/diablo_3_ps4_wiki_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66663739-cb66-4aff-b2c5-81b9abec3532/murray_46_inch_riding_mower_drive_belt_diagram.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd9567c8-2b53-4bcd-b217-a57f56372f11/observational_zymology_manual.pdfIn PDF document text
    • http://tivakifuzir.atwebpages.com/environmental_chemistry_notes_for_class_11.pdfIn PDF document text
    • http://viwuwijagabote.myartsonline.com/jazavubududiluliposelide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ea70d0f-dbea-4d36-82cf-c97d6eeae93e/comentario_biblico_moody_para_descargar_gratis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/792d0cb7-ebca-4718-af26-d87faed398ca/mixafavaziruzug.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e068d7f-9961-44ba-8154-0d3b60d8ca8c/81726732790.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17285b2c-5136-4b8f-87de-39e819a83e98/58360824838.pdfIn PDF document text
    • https://s3.amazonaws.com/popilo/cisco_9865hdc_mr_dvr_server_hd_2gb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3182113-d80c-49e3-ad1e-b48aa956304b/7477794711.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011b4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B4F 4700 bytes
SHA-256: 8a9060122834215c0fb819e76d104468d5e70c13750bcabf02f6d2428b1f32fc
font_01_sfnt_off00012b34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B34 2520 bytes
SHA-256: aa8c080ef2f6fd3e40d34ea0d54b7ea0c9abadabe0dbd407c40d4b59c4af03d5
font_02_sfnt_off0001367d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1367D 11436 bytes
SHA-256: 15ca1b9618765085e553c1baf7493878814504494ad33e9909f19a4b8f848fb9