Malicious PDF — malware analysis report

Static analysis result for SHA-256 906ad32cd2219d3b…

MALICIOUS

PDF

76.7 KB Created: 2021-03-18 04:45:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 9a1fc1aa69c30ca66a734328e9f08734 SHA-1: b813b2c04fe63fe75bc428b0f9a83dbe5506024d SHA-256: 906ad32cd2219d3b50c183b0cf90cf5f2ed77c20c8cbaad93bcdeadf25461395
186 Risk Score

Malware Insights

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

This PDF file is identified as malicious by multiple heuristics and a machine learning classifier, specifically flagged as a phishing trojan. It functions as a link farm, containing numerous external URIs that likely lead to malicious content or phishing sites. The presence of embedded URLs and the overall structure strongly suggest an attempt to lure users to external resources for exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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.
  • 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://lozipotod.ru/wix?keyword=random+2+player+games+unblocked PDF link annotation
    • https://dalokagamamis.weebly.com/uploads/1/3/4/6/134695183/nisusasop.pdfIn PDF document text
    • http://affilateapp.online/jejugirarutiacnrs.pdfIn PDF document text
    • http://ninuxalezopo.getenjoyment.net/tupotabofofefesif.pdfIn PDF document text
    • https://pinozawekik.weebly.com/uploads/1/3/4/5/134589254/gedamik.pdfIn PDF document text
    • https://patelevenimo.weebly.com/uploads/1/3/1/4/131437444/vigubiburafuwekasunu.pdfIn PDF document text
    • http://rejasikega.scienceontheweb.net/kujokeme.pdfIn PDF document text
    • http://crysety.xyz/vowobuwaybpsw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://73e25548-3913-4bbb-aa69-a1b25f69568d.filesusr.com/ugd/cece23_e728ba0736fa49799994767345305ebf.pdf?index=trueIn PDF document text
    • https://c84d532c-3b33-47d6-96aa-4134a1164eb1.filesusr.com/ugd/6d45f6_2363dc667e4e4b7b9c74ba1a2e868c0f.pdf?index=trueIn PDF document text
    • https://5663e088-3595-439c-971a-5873693bee35.filesusr.com/ugd/e98895_ba51203ca290455b8ba05c5b6e9bde50.pdf?index=trueIn PDF document text
    • https://e9abb47e-19e5-4ec2-9f3c-2aa4e6f2bf0a.filesusr.com/ugd/92be99_1398e2a6b0d044e5b65b699071c05e71.pdf?index=trueIn PDF document text
    • http://fawipiro.rf.gd/pura_vida_beginning_spanish.pdfIn PDF document text
    • http://vubuzixefixa.onlinewebshop.net/application_of_catalyst_in_industry.pdfIn PDF document text
    • https://e60c805d-b9e1-47fc-b045-983511e9ac1f.filesusr.com/ugd/116bb2_aae3716d77454737a571f26648865a7b.pdf?index=trueIn PDF document text
    • http://satawakerexe.atwebpages.com/zumome.pdfIn PDF document text
    • http://muliwavanebebo.onlinewebshop.net/livro_completo_alcoro_em_portugues.pdfIn PDF document text
    • https://23da7c74-6e14-424a-b22a-901aa35eafb1.filesusr.com/ugd/9cc572_a5ef7f1d21f944e38fe03584074747e6.pdf?index=trueIn PDF document text
    • https://f1ddcea9-c323-452c-a4d3-aaefec61e50a.filesusr.com/ugd/defd8a_28e1226982024b1cafbf206574d8f44f.pdf?index=trueIn PDF document text
    • http://xovapigebiz.rf.gd/report_damaged_card_chase.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_off0000eeb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEB7 5836 bytes
SHA-256: 4934b847a3a51cef443ab5aef41ab973430405c6661570443e604e3955d7712c
font_01_sfnt_off00010291.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10291 10256 bytes
SHA-256: 58093f6e8f9429817d9ae1fe40d41b03575ebb884578c2d4d8d9fb2c3a7fcfe1

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