Malicious PDF — malware analysis report

Static analysis result for SHA-256 039c6286c47986d7…

MALICIOUS

PDF

75.3 KB Created: 2021-03-20 10:01:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 606d9d0c3547528a9c9081eeb768f36e SHA-1: 9a50edf2973feca26a67bd36be177c8104fda5dc SHA-256: 039c6286c47986d7e52f44c42bb67cb91c65faf67755a51277e5723ef8a5653e
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a common tactic for SEO poisoning and phishing. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, with one pointing to 'http://wasegulom.mygamesonline.org/37632378660.pdf'. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a malicious lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://botokaw.ru/award?keyword=change+pdf+file+to+word+document+online PDF link annotation
    • http://wasegulom.mygamesonline.org/37632378660.pdfIn PDF document text
    • http://josumewemuzob.getenjoyment.net/71763828279.pdfIn PDF document text
    • http://kevakigev.medianewsonline.com/32280818332.pdfIn PDF document text
    • https://dejewetekexofig.weebly.com/uploads/1/3/0/7/130775583/146c2495.pdfIn PDF document text
    • https://dofixojibol.weebly.com/uploads/1/3/0/8/130874360/gawidetidakepiroke.pdfIn PDF document text
    • http://palawawez.mypressonline.com/data_security_and_privacy_in_cloud_computing.pdfIn PDF document text
    • https://tatogupuragafa.weebly.com/uploads/1/3/4/0/134096405/tujusamovegaxakijuk.pdfIn PDF document text
    • http://tupaxeguna.scienceontheweb.net/what_order_do_you_use_lumin.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/fizup/dofovasititoxunedokumepoz.pdfIn PDF document text
    • https://s3.amazonaws.com/nokiva/zedugem.pdfIn PDF document text
    • https://s3.amazonaws.com/xilasisefi/36218850234.pdfIn PDF document text
    • https://s3.amazonaws.com/tibitexil/create_word_template_for_sharepoint_document_library.pdfIn PDF document text
    • https://s3.amazonaws.com/xipavir/materiales_de_obturacion_en_odontopediatria.pdfIn PDF document text
    • https://34ea5197-a9e9-4ba5-99bb-a7dd7aeba98b.filesusr.com/ugd/234f58_26ee4b02eb54456ca7488fcac05a85da.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xonobijikivo/bikakupipez.pdfIn PDF document text
    • https://s3.amazonaws.com/polexebuj/cisco_sfp_1g_datasheet.pdfIn PDF document text
    • https://ed21222e-fee3-4fab-8b52-e2ddb7bb35ab.filesusr.com/ugd/e73fea_c1aa5ad29df9478ab577a8fbd83fc8e4.pdf?index=trueIn PDF document text
    • https://6b2d4799-12fc-456d-8881-596234ac9a0a.filesusr.com/ugd/ae8ff6_c22401fc86814f96906c8b8ec02259b4.pdf?index=trueIn PDF document text
    • https://2a4c341d-9af7-4f89-b48a-1b926ad6ced7.filesusr.com/ugd/dd6616_aba13b79a8f84afe8055c481bf491efe.pdf?index=trueIn PDF document text
    • https://0aa989e7-076c-475f-bc22-fff5ae310860.filesusr.com/ugd/b44be6_0366b905ba544f649a0951673d7d617f.pdf?index=trueIn PDF document text
    • http://nabenejajoko.myartsonline.com/how_to_troubleshoot_a_thermostat_on_a_hot_water_heater.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_off0000e7fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7FA 5388 bytes
SHA-256: 5d27e46e5fe6894f7f8324f3776f319fc800d14fb6ebfd79cf9933a288422e88
font_01_sfnt_off0000fa39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA39 10984 bytes
SHA-256: f1b261ff7a309e73a58fea6e358caaee8bf55eb294a99e7a50c2b0343f5d5a8e

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