Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ea60a9912266cbb…

MALICIOUS

PDF

70.5 KB Created: 2021-03-22 13:43:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: ae57035d3bfa076e8a97c63722d30114 SHA-1: 7051e80104977ebe31fb17b69fe59431f6201435 SHA-256: 9ea60a9912266cbb47550f00c4acc90565d1d73d4f469d793143b468f9b3aee8
186 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 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://kuzutuzo.ru/aws?utm_term=fisher+price+elephant+swing+replacement+cover PDF link annotation
    • http://zopokujejisolan.getenjoyment.net/xinidiboloxowesonotezep.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4503584/normal_60084666783df.pdfIn PDF document text
    • https://tadiselugel.weebly.com/uploads/1/3/4/5/134589133/tabezaligi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403680/normal_60584d95f1faf.pdfIn PDF document text
    • https://visofebofoxofub.weebly.com/uploads/1/3/0/8/130814652/virikawarigujob.pdfIn PDF document text
    • http://rolapisi.scienceontheweb.net/antihypertensive_drugs_file.pdfIn PDF document text
    • https://fatitabo.weebly.com/uploads/1/3/4/7/134757356/senixukelerazosuwimu.pdfIn PDF document text
    • https://kezaguwubov.weebly.com/uploads/1/3/4/6/134632481/zapije_sabevezafajed.pdfIn PDF document text
    • https://nopolojeg.weebly.com/uploads/1/3/5/3/135349815/3450269.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494429/normal_6017b701beb5e.pdfIn PDF document text
    • https://likosevatifipol.weebly.com/uploads/1/3/4/5/134584064/foziranabojupin.pdfIn PDF document text
    • https://lasebotoxuxuxir.weebly.com/uploads/1/3/4/7/134729765/b474789f8403.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423189/normal_601a08c930580.pdfIn PDF document text
    • https://xefigokilevugez.weebly.com/uploads/1/3/5/2/135299251/fc8da278b09e3f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://3fb740b9-71d8-4183-8edb-de11b68c0a29.filesusr.com/ugd/1fbf8b_c23831029e8649c19756cd50edd66fea.pdf?index=trueIn PDF document text
    • https://a146b927-ed54-472d-b3a8-6b137e313b92.filesusr.com/ugd/4d400c_9d8b7294ac594a339bff9785a079bf6a.pdf?index=trueIn PDF document text
    • https://e05653fc-386e-4c8b-889d-738aee72c63e.filesusr.com/ugd/62421a_2814a9eae49c42a3b6114ef9e9013f62.pdf?index=trueIn PDF document text
    • https://aa4de0c4-a7fb-47f6-97fe-5721705e71c1.filesusr.com/ugd/824332_7b390a3c4b64470ba013d90310651276.pdf?index=trueIn PDF document text
    • http://nisetekotixob.myartsonline.com/list_of_words_used_in_adverbs.pdfIn PDF document text
    • https://f803bf1b-e1c2-47f6-a41f-c9785c88fbd4.filesusr.com/ugd/bf07b1_33bb83493339450393b237cdcfa5b77c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/32827195-5241-4305-bbfb-d427c1c7bd13/55005370797.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee2aa51f-0dcc-4572-aa56-2e747471448d/how_to_use_moist_heat_with_heating_pad.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_off0000d2f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2F3 5452 bytes
SHA-256: 78de9e456e789486e18e5601bf4c1157e009607c0d2bb5c50bd777649f9cc8ac
font_01_sfnt_off0000e579.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE579 11032 bytes
SHA-256: 3ca9f7f8ac096d971d31e729709a8dae9ce8c42c0b025f46ece0521c8076b572