Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fc8e2050a9441e7…

MALICIOUS

PDF

68.1 KB Created: 2021-05-03 21:01:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 8c6851c6f83640b6126254bf6cc4816a SHA-1: 5f973405ed8cedbb683c20628c8977af0261a6fd SHA-256: 0fc8e2050a9441e7d79660e1a2996eacec603ea992110590b06a37b9cd9fd806
156 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. Specific URLs and indicators for this sample are listed in the indicators section.

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://midufefew.ru/strik?utm_term=shark+professional+1500w+iron+manual PDF link annotation
    • http://zeropium.com/xufikamubelarn1t8z.pdfIn PDF document text
    • https://wabexerimib.weebly.com/uploads/1/3/0/7/130739061/c95c49ebf8841e.pdfIn PDF document text
    • https://vakogupomuniv.weebly.com/uploads/1/3/4/6/134610568/6312816.pdfIn PDF document text
    • https://vesasasafej.weebly.com/uploads/1/3/4/7/134758359/toxadozibigi.pdfIn PDF document text
    • https://jokesekarizav.weebly.com/uploads/1/3/1/4/131407558/3868169.pdfIn PDF document text
    • http://nanonewe.scienceontheweb.net/bolenapax.pdfIn PDF document text
    • http://tuvivukaroj.mygamesonline.org/ejercicios_con_adverbios_de_frecuencia_en_ingles.pdfIn PDF document text
    • http://pro-komp-master.website/what_do_we_do_when_we_feel_nothingvqs16.pdfIn PDF document text
    • http://ravigimojamel.mypressonline.com/times_university_ranking_2020.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/wunupalezozerud/13114418760.pdfIn PDF document text
    • https://9cf5cc10-3c2e-4e30-ae6b-73ed7beed88a.filesusr.com/ugd/5c2b46_3cb03c91b61145378603d2dd49ac410a.pdf?index=trueIn PDF document text
    • https://93dbb2ad-f1e8-4c6c-adfd-2ef134399473.filesusr.com/ugd/df4650_61f8ff72bfcb40bf9bf027d0117e08b3.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tapelu/salems_lot_2004_full_movie_download.pdfIn PDF document text
    • https://s3.amazonaws.com/nodetuxapabara/cute_printable_grocery_list_template.pdfIn PDF document text
    • https://9e269ae7-c3cf-4b9f-bde2-1d9be064b7bf.filesusr.com/ugd/139869_2de364fb3fa145bf96523fb0bc4b8583.pdf?index=trueIn PDF document text
    • https://952d9f4b-853a-4e85-af28-23c4d489d487.filesusr.com/ugd/8db125_5c396622fcb74b3d86478d53a8ef8af5.pdf?index=trueIn PDF document text
    • https://8084a2ae-6cfb-493d-8155-0d4219c0f7e3.filesusr.com/ugd/5b3528_08c9fb8669b646b6ad56c1ce78cca01c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bokexizometun/pageant_judges_score_sheet_samples.pdfIn PDF document text
    • https://s3.amazonaws.com/jenisozazewubo/jetobotazag.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_off0000c974.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC974 5716 bytes
SHA-256: 65713908bb18f9ce2181eb9b75f923f4a54d0ca05241a63de8eedd5692bb7756
font_01_sfnt_off0000dcdb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCDB 11484 bytes
SHA-256: 05828f7de2472838e3686ce6076d32030afb1e3b07747bdb36507f85f73769b8

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