Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a1e2efa00a35977…

MALICIOUS

PDF

83.5 KB Created: 2021-04-15 04:35:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 271b942f11196f7570bf986971d61b2d SHA-1: 56b88ae61268c2c67214c42e21a8234ce9c216b9 SHA-256: 0a1e2efa00a359778f9d049c5f425941d641cadd499c936ec7188a57a0fdbc87
134 Risk Score

Malware Insights

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

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 and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

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 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://druttle.ru/strik?utm_term=hindi+grammar+worksheets+for+class+10+cbse+with+answers PDF link annotation
    • https://cdn.sqhk.co/zatejurix/ZijFQpO/32899679124.pdfIn PDF document text
    • http://opros.xyz/238383414062j4ov.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4423715/normal_5fe059fbca2d1.pdfIn PDF document text
    • https://cdn.sqhk.co/dukosisevu/Gjdjage/1683858692.pdfIn PDF document text
    • http://nejupike.mygamesonline.org/how_to_make_a_folding_shooting_bench.pdfIn PDF document text
    • http://xamojopilupivo.scienceontheweb.net/dental_assistant_job_description.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470218/normal_5fe4bcb83bdee.pdfIn PDF document text
    • http://vavexefane.mypressonline.com/6395049353.pdfIn PDF document text
    • http://rogevunesopu.medianewsonline.com/fusionner_2_en_1_seul.pdfIn PDF document text
    • http://tameeniraq.com/scenario_manager_excel_templatevo362.pdfIn PDF document text
    • http://uablog.site/funudafyne6.pdfIn PDF document text
    • https://cdn.sqhk.co/kinanekoxo/zhjhghc/grow_empire_rome_tavern_heroes.pdfIn PDF document text
    • http://lazujifoxupa.getenjoyment.net/gimidokejixizaruwitewaz.pdfIn PDF document text
    • http://pamatidela.getenjoyment.net/riweroduligolasinifuwonar.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465702/normal_60072f780a92c.pdfIn PDF document text
    • https://cdn.sqhk.co/barevirus/xghrhgH/70553871019.pdfIn PDF document text
    • https://cdn.sqhk.co/tojebaru/jgfgdih/25519696313.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467955/normal_602f53901cadd.pdfIn PDF document text
    • http://tokio-2020.fun/16793456071oawym.pdfIn PDF document text
    • http://fumuroruzej.medianewsonline.com/14893863031.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://uploads.strikinglycdn.com/files/50776847-8e19-467f-beb3-a113a5e528b3/62431651730.pdfIn PDF document text
    • http://jowawaba.atwebpages.com/40678542044.pdfIn PDF document text
    • http://vumamuv.myartsonline.com/feedback_amplifiers_nptel.pdfIn PDF document text
    • http://bolirazebaf.myartsonline.com/casio_scientific_calculator_fx-115es_plus_price.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b900d04-3b78-4c68-be61-0b1e705a1c6e/sony_alpha_a77_camera_case.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ccead94f-c1a3-4fae-aa32-b8905e8c9f13/mupilowolipinomo.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_off0000f715.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF715 5884 bytes
SHA-256: 3d8d7641666e2d7c35f8ef0ee9ef377adb8ec5aee5f7e14cbc6479341d77e2e9
font_01_sfnt_off00010b0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B0C 10740 bytes
SHA-256: 8749a388ad159da00eabd7021feb2613bafdfc633af31ccca88d10b2252caf25
font_02_sfnt_off00012feb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FEB 4000 bytes
SHA-256: 4cbcffe4987035d8101c690c3ea9ab906858bb67cdc6bddcd156f818cc9b7336