Malicious PDF — malware analysis report

Static analysis result for SHA-256 e579b45dbeda80a0…

MALICIOUS

PDF

71.7 KB Created: 2021-03-06 08:04:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: d141a759126d8d792a603cecb5037f36 SHA-1: 1309a34ee4bc355ca46d70983dbca4e0825bec5d SHA-256: e579b45dbeda80a00207f39c897574629a88ac65e0d4600b69308b74cafef948
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://zajinet.ru/wix?keyword=cell+reproduction+virtual+lab+answer+key PDF link annotation
    • http://raladotid.22web.org/gizuviwexulunufifilofa.pdfIn PDF document text
    • http://muvariwiporiju.iblogger.org/data_analytics_jobs_entry_level_salary.pdfIn PDF document text
    • https://butevexonukuzi.weebly.com/uploads/1/3/2/6/132681970/sitav_rowisas_kedidom_musupuga.pdfIn PDF document text
    • https://bakukiteziz.weebly.com/uploads/1/3/4/8/134860946/ceaf0e5894e.pdfIn PDF document text
    • http://warupipujamoru.sportsontheweb.net/melee_tactics_toolbox_download.pdfIn PDF document text
    • https://jilarikogezinuv.weebly.com/uploads/1/3/0/9/130969280/9127719.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/8921a23e-44a5-4c6e-b251-6f77e3220670/bifibejorobifovaraju.pdfIn PDF document text
    • http://bidejepeko.onlinewebshop.net/aws_vpc_interview_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/mukutud/skyrim_charmers_of_the_reach.pdfIn PDF document text
    • https://45f61934-b4a1-4335-a9e3-e142d9465b5b.filesusr.com/ugd/0dd040_0d98fd579f98463e8d220a92003d72da.pdf?index=trueIn PDF document text
    • http://gifojakuwijipiv.rf.gd/how_to_use_summer_infant_monitor.pdfIn PDF document text
    • https://b7af6bb9-01eb-4839-ab56-764651de4344.filesusr.com/ugd/2486b5_cff38419c9e54a6db92e8d77bf357316.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sagotomagin/pejagetebolovepunosorug.pdfIn PDF document text
    • https://s3.amazonaws.com/rezugekolaba/luwukidadix.pdfIn PDF document text
    • https://86042ffc-9b62-460b-8552-fb2522205a17.filesusr.com/ugd/4f92c1_c6e0cde8dee347049e2fff70ca9bc425.pdf?index=trueIn PDF document text
    • https://59b7e61f-9850-45ee-add2-e9646db267e4.filesusr.com/ugd/5b9365_b2c0addcde7a4c58a664aab16b0a3763.pdf?index=trueIn PDF document text
    • https://78bdfa25-736e-4945-a764-db21511aacb9.filesusr.com/ugd/9bd82e_09977375b41d40de91e3ae9c25b40c80.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ebc44956-17df-49df-b35c-44c2a700a524/poulan_pro_snow_blower_user_manual.pdfIn PDF document text
    • http://nidexivoji.epizy.com/introduction_to_environmental_engineering_5th_edition_solution_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/fejififimaketo/39573329475.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_off0000da4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA4F 5428 bytes
SHA-256: f8a860b74b0165f08f4c6cf07460c4d45e3a1d9f99fbb06def55ba977f4d8b4b
font_01_sfnt_off0000ece1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECE1 10812 bytes
SHA-256: 912ca55fef0ff2a36d0d1bf1d70af81e7324d2e35b7981e0cbe93d279cae626f

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