Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad6fb76a06ef08e8…

MALICIOUS

PDF

75.7 KB Created: 2021-04-03 06:21:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 9d93eea366a8bef4541625d0ef2b4145 SHA-1: 7032f00501a11187abd001f1caafa7884883ab76 SHA-256: ad6fb76a06ef08e8bbed295bd03316784f938415bcbc48175976660b8e0315a0
126 Risk Score

Malware Insights

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

The PDF contains multiple external URIs and is flagged as a link farm on disposable hosting, indicating a phishing or redirection attempt. ClamAV detection as 'Pdf.Phishing.Trojan' and ML classification further support its malicious nature. The embedded URLs suggest an attempt to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://resalured.ru/wix?keyword=cell+cycle+worksheet+and+diagram+identification PDF link annotation
    • http://biniwitovo.mywebcommunity.org/23142772177.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386829/normal_5fd68db75fbaf.pdfIn PDF document text
    • https://cdn.sqhk.co/kapipota/dhidOjQ/romifonugepizaroxuz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451227/normal_6017a941ac76b.pdfIn PDF document text
    • https://cdn.sqhk.co/jowepotoxum/fifPggc/train_sim_world_2_xbox_one_controls.pdfIn PDF document text
    • https://cdn.sqhk.co/xizemeginu/pAT8jej/cdna_library_construction_steps.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476273/normal_601ad59379707.pdfIn PDF document text
    • http://risonubokedoxav.scienceontheweb.net/5022917666.pdfIn PDF document text
    • https://cdn.sqhk.co/tuvameboroke/bhgVogj/fios_tv_one_equipment_cost.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446914/normal_5fc6bbdb8bf4a.pdfIn PDF document text
    • http://remoliwagofaju.mywebcommunity.org/nowogolejeperiguriwoko.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421330/normal_5fe1b1845e927.pdfIn PDF document text
    • http://bejisosubonito.sportsontheweb.net/54483080483.pdfIn PDF document text
    • https://cdn.sqhk.co/jagakutojut/cjfeZ2Y/funny_jokes_and_riddles_for_adults.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/306a6d46-8c85-4fa0-a768-664c7467e257/jobijunalarewa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d32f9b0-8b3a-4d26-99d1-000ec597a8fb/jiniriperonavuvovosajus.pdfIn PDF document text
    • http://rizivubonulej.atwebpages.com/75223010255.pdfIn PDF document text
    • http://dolanuvusipegu.myartsonline.com/sustentabilidade_economica_social_e_ambiental.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/78699441-9fec-4da0-838e-1efd7807190f/audacity_free_download_for_ipad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/937fe803-8f7a-4ec4-94ec-cdba751bb578/why_mail_gets_returned_to_sender.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/307546f3-dc19-4b61-a5ec-1c323c7912a1/jadaruvavivuwogakukexovef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/75441a49-561c-4aea-8e73-fa99dff57cfd/52425599890.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/441c21a2-d093-49e3-bbef-6d9c66055222/34096430706.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94a76bac-6f2f-4192-bcca-5b30851fde47/denogedixesunexurixi.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_off0000eb31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB31 5600 bytes
SHA-256: e7277d756d55321815037f97a53870dccbebe06a74a78cb13e3581ccad518c38
font_01_sfnt_off0000fe2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE2F 10276 bytes
SHA-256: 517230981f13f8e11a2ee2263ba16b2ecfa79404ef2197b7c80e651369679410