Malicious PDF — malware analysis report

Static analysis result for SHA-256 d22d36c60706cb6b…

MALICIOUS

PDF

69.0 KB Created: 2021-03-07 18:23:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 0a657a3aa5d3974f3075e2b00c663c55 SHA-1: 559298129c9c1ce929163de9b2d381ff9eb1f3d9 SHA-256: d22d36c60706cb6b1f9efb2fcc8224f76189d9c11fb80b03c4c31613203c6277
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a technique often used for SEO spam or to redirect users to malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest an attempt to drive traffic to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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/award?keyword=genie+promax+garage+door+opener+keypad+programming PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4365652/normal_6022ae252266d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462732/normal_5ffbaf26f1d2c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477638/normal_6014699fdd0e1.pdfIn PDF document text
    • http://makedctl.site/swot_analysis_template_powerpoint8gwid.pdfIn PDF document text
    • http://shoes-storie.club/knight_of_wands_health_outcome7pyun.pdfIn PDF document text
    • http://clebohets.xyz/what_is_the_weight_of_a_plastic_pallet1hjhm.pdfIn PDF document text
    • https://cdn.sqhk.co/vemunaxudug/gdjhjeB/shake_shack_promo_code_september_2020.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404755/normal_5fee99b59abbf.pdfIn PDF document text
    • http://servisvds.ru/neo_geo_battle_coliseum_rom_atomiswave6m3pk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4458163/normal_5fcd26998db75.pdfIn PDF document text
    • https://cdn.sqhk.co/bewewojiwo/L2nhcgc/xotubodegawusuzerelaf.pdfIn PDF document text
    • http://reduslimitaly.website/answers_to_questions_about_the_nfipns9l4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://45180a89-8b92-4d54-a4c6-cdf0ad6af3c7.filesusr.com/ugd/2b98a3_562e0df9f2ef4f4e851e32c2ce4025f2.pdf?index=trueIn PDF document text
    • https://d872ce2a-2baf-4032-ab86-ab75b2f66d52.filesusr.com/ugd/338562_50d1505311d84426b7a300a27f224f70.pdf?index=trueIn PDF document text
    • https://a12a05ab-6462-4855-b086-b0a2a961d6d8.filesusr.com/ugd/2c76f4_dc37556d07ed459d93ae962bfd285ed5.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1d4d4ef-ee13-489f-b080-41ef90e5544f/8068203119.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e26c2ff-b892-4937-abf8-b9b9d2c1fcef/51630323063.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f1088dc-7d1a-4c28-b08e-b143538d8927/samsung_8000_series_refresh_rate.pdfIn PDF document text
    • https://7c8f45b7-e058-4e27-bccd-8ee7dcb26900.filesusr.com/ugd/d5cf39_b7165668cbb04bd6b08140eb628053a4.pdf?index=trueIn PDF document text
    • https://a96990da-dd17-4b11-844c-aba2d588d1b6.filesusr.com/ugd/5e5e7b_21f81bc938a54fa7bfac67723af375a6.pdf?index=trueIn PDF document text
    • https://09972071-4174-499b-90b1-de3619f59f53.filesusr.com/ugd/d1c05f_3cd6fb164edf4879b72da5aaca59ad57.pdf?index=trueIn PDF document text
    • https://c0771fee-1ba5-4dbf-bba5-a775c3d44c03.filesusr.com/ugd/544e7e_261e9d3d29f847448800677981d15d5f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/02f9651e-8ed7-481c-be72-e601da8c4e00/1355619386.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_off0000d156.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD156 5332 bytes
SHA-256: 0ffa8c6ded41a073e7d9fef52df5d8ba733c3616b61fc4906d39a6da4765deb1
font_01_sfnt_off0000e371.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE371 9972 bytes
SHA-256: ab3928dfe1c1bb6c7467921b2c2aa5510a9710f2ec813ba8bc475776d228e41c