Malicious PDF — malware analysis report

Static analysis result for SHA-256 aaecc6484d96978b…

MALICIOUS

PDF

73.8 KB Created: 2021-06-12 05:50:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 73789167de3ae9fa05539153332513dd SHA-1: 644a9b0650a7463851f0711fd1d35ed6ee0ad965 SHA-256: aaecc6484d96978b6e643b0a75b66ca54a22e337d10601e17229849145051096
156 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic, with the primary malicious URL being infrive.ru. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a phishing or trojan variant. The embedded URLs and the nature of the link farm suggest an attempt to direct users to potentially harmful content, aligning with phishing or malware distribution tactics.

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 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://infrive.ru/pbw?utm_term=neet+32+years+mtg+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4496816/normal_5fdbde5060aeb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467027/normal_606e06f51a833.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473618/normal_5fc71da3db690.pdfIn PDF document text
    • https://xizerusepu.weebly.com/uploads/1/3/4/3/134308384/25d6e5dc6e662c2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488339/normal_600bb2c08740a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445889/normal_603ef40255ebd.pdfIn PDF document text
    • https://juladugalevatib.weebly.com/uploads/1/3/4/3/134385664/1462590.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4421970/normal_60b6446e1feaf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403418/normal_5fd7eaba58569.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472481/normal_6044d59e1724b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411937/normal_60680ddf59f16.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489257/normal_6004f5cabd355.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/5263e2c2-565f-463e-b18a-da29ea97c640/18442188958.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/549da222-e81e-418a-a9d3-7954addfab06/34263368499.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d0c0951f-0d18-4958-bb3e-88b7b49226ca/how_to_write_a_psychology_case_study.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e7d529dc-63f5-4380-9f81-d13b3db559c5/verax.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b06c3c6-4fcc-4f6c-877b-e54a6c346ff5/lotijinoronilojuvemazud.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/949ae53f-b094-4187-bf5c-a24c3bd7f546/realidades_3_capitulo_1_examen_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b183cd3-5f2a-43c2-ae9a-b6ca63501542/raxidosinaluditisiw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3af4c1be-a2cf-4667-8a16-84b87a708811/godujuxepidebobugo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9472bc63-5b57-4b7f-8396-56ac2cd29e6f/2d_and_3d_shapes_worksheets_for_grade_5.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/11303c75-4fd6-4dba-ba56-6218d08949b6/navewabenevivotizisiro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c5af9073-a390-41cb-8965-d27d818e08eb/7_years_old_piano_sheet_music_easy.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca49f651-4be4-4b86-8f1b-f3dd43e42cd8/dewalt_dwe7491rs_throat_plate.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_off0000e1ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1ED 5696 bytes
SHA-256: 9d0f4215d3cd50055f60bfdcf11dbddc880ac2e52acfc9aa63f9787798672453
font_01_sfnt_off0000f550.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF550 10692 bytes
SHA-256: 499ae3a8d9247c782267c06b83b2931eaafb5dd46d261582114758c4c018cf14