Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0dbbd9223b898a8…

MALICIOUS

PDF

77.1 KB Created: 2021-03-12 11:08:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 649dc69dceddfc3468fad1b2b7687fd7 SHA-1: 975077afbb226db0cfc7ac8242f742afad773f8d SHA-256: d0dbbd9223b898a80bb8b8c86d37592e5421dbd056d096edc7af1ffdce4141c9
244 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1204.002 Malicious Link

The PDF file contains numerous embedded links, many of which point to disposable hosting or known malicious redirectors. The primary malicious link identified is https://yafferge.ru/wix?keyword=summoners+war+transmogrification+list, which is likely used to deliver a secondary payload or phish for credentials. The document's structure and link farm behavior are indicative of a phishing or redirection campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/wix?keyword=summoners+war+transmogrification+list In PDF document text
    • https://cdn-cms.f-static.net/uploads/4375531/normal_603756bcaf006.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481552/normal_5fdb7fbb22399.pdfIn PDF document text
    • http://kumaboperituf.22web.org/2009_smart_car_air_conditioning_problems.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461234/normal_5fc8d6d28385b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495058/normal_5fddb12742072.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/8ffffa89-64d3-4bd6-a406-e9d7930a959d/que_son_las_purinas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/444bb359-fbeb-4e36-b4bb-ef779cebc5c7/misetumonivo.pdfIn PDF document text
    • http://vajexakatozezal.epizy.com/facebook_for_windows_8_32bit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d38b79e-312d-4d4e-898d-53c85a4613c5/80242563530.pdfIn PDF document text
    • http://wexaxota.epizy.com/animator_apps_for_android.pdfIn PDF document text
    • https://71da2aa5-51c3-4f2c-ab18-08bbbad20131.filesusr.com/ugd/d216cb_93cffc91266d4a8383cd2d2b5c8ceaf9.pdf?index=trueIn PDF document text
    • https://77da94c0-0f0a-445b-87af-e489a0b5ef66.filesusr.com/ugd/db1da1_9c2021f119694a6f880124eff4696898.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lijopavexanuse/best_free_website_builder_templates.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec4234d8-02b1-40c8-adb8-aab230cb988b/raxekidibovapim.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwisigetizoxif/gipugogajuw.pdfIn PDF document text
    • http://magikid.epizy.com/maps_minecraft_adventure.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec627879-4447-48bb-9d7f-6e29abd92038/safety_1st_alpha_omega_3-in-1_car_seat_instructions.pdfIn PDF document text
    • https://s3.amazonaws.com/fobupojowojon/lusalixujinuvikav.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a414bfa-fadc-4ffa-b4e8-f3c2656782f5/zifavejodutuwudoviparur.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce78161b-f8f3-401e-98fc-fd5c8c97bbca/62153428565.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_off0000f148.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF148 5396 bytes
SHA-256: fdaf1b840d814c513f51fdf17549141bc82a282ade67c087b0d96b386fca6bd2
font_01_sfnt_off0001039c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1039C 10484 bytes
SHA-256: d55f4c347e199435f3f1cc692544d473b4b71f24394f49a57cc9f7dea80dca3a