Malicious PDF — malware analysis report

Static analysis result for SHA-256 1276878253e5d62e…

MALICIOUS

PDF

83.5 KB Created: 2021-05-12 20:30:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: cdfabe428fea2e7bd625772940af6e66 SHA-1: da6e2821231e620fe4c670d575d262cd0a2cbebb SHA-256: 1276878253e5d62ea47d2244391df90fa1e4f79c8b95190f85b27b24f2e83b5b
156 Risk Score

Malware Insights

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

The PDF document contains numerous external links, with one prominent link disguised as a search query about Domino's pizza. This suggests a phishing or SEO poisoning attack designed to redirect users to malicious content. The ClamAV detection and ML classifier further support its malicious nature, indicating it is likely a phishing or trojan delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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.
  • 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://baarspo.ru/strik?utm_term=is+domino%2527s+pizza+healthy+or+unhealthy PDF link annotation
    • https://zobegutibeg.weebly.com/uploads/1/3/4/9/134902349/bb017796.pdfIn PDF document text
    • https://dumisoxi.weebly.com/uploads/1/3/4/6/134625223/tirulezenexado.pdfIn PDF document text
    • http://springwin.space/tizedulolajot23vq.pdfIn PDF document text
    • http://trenolgia.buzz/5850758248602dlc.pdfIn PDF document text
    • http://giocodigital.fun/is_brandenburg_v_ohio_still_good_law6aiw8.pdfIn PDF document text
    • http://ru-order-687646765445.art/11699044746dlb5y.pdfIn PDF document text
    • http://pro-komp-master.website/zujuserunagpqoj.pdfIn PDF document text
    • https://cdn.sqhk.co/riroxale/jqIPUWx/fha_underwriting_guidelines_for_student_loans.pdfIn PDF document text
    • http://help-verification.com/water_today_magazinevg2db.pdfIn PDF document text
    • https://levapexufusetij.weebly.com/uploads/1/3/4/9/134904519/naleku-gopejasa.pdfIn PDF document text
    • https://cdn.sqhk.co/joxesinejag/NjaG7V6/84825803687.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/jijari/how_to_connect_plantronics_hw520_to_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/gazitif/28940221659.pdfIn PDF document text
    • https://5a2ada08-5b6c-402a-b0df-3636415b461e.filesusr.com/ugd/434ae6_6998736d47d54d0dafb85112afd137ac.pdf?index=trueIn PDF document text
    • https://52431b39-7396-4b0c-bcaf-ab72d449a1bf.filesusr.com/ugd/f8cef3_82f700f5f22d4e53a2b9e97a7de97537.pdf?index=trueIn PDF document text
    • https://5637a596-61ce-4e67-8953-8fd9cb84b940.filesusr.com/ugd/c20ea7_1610624bd71341d7ada497a6d0c58db8.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dusined/ibps_so_application_form_print_out.pdfIn PDF document text
    • https://s3.amazonaws.com/rubidokezive/91528984034.pdfIn PDF document text
    • https://s3.amazonaws.com/naxozelozude/everglow_piano_sheet_free.pdfIn PDF document text
    • https://54d25d35-1219-4e5f-97c3-905e72ea606f.filesusr.com/ugd/6d59ab_a58050d16a9247f4892b7410f7ba5976.pdf?index=trueIn 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_off00010677.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10677 5320 bytes
SHA-256: 8aa61450c67a174c20f349e80e74c3ac28bda06061a3456759d6385dd713948d
font_01_sfnt_off00011877.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11877 11304 bytes
SHA-256: 3205ec7d0cc25828f3d835abc909fffc5df7f27a43c7eed2d66bca8c259b0236

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