Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d9b732a0df52a56…

MALICIOUS

PDF

90.7 KB Created: 2021-03-14 11:59:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: fbe38f96b40caa99be20139a52e9f9c7 SHA-1: 9cbdc65762f83919abd5a1d75b2c226407fb91f2 SHA-256: 5d9b732a0df52a56032bb1941720dfef75d320ce8834cd09aa915e72409b81d7
156 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9997

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://ponafet.ru/award?keyword=1949+armistice+agreement+pdf PDF link annotation
    • https://vekadewozume.weebly.com/uploads/1/3/0/9/130969331/3041513.pdfIn PDF document text
    • http://grampus-shop.com/how_to_clean_kenmore_elite_he3t_washer19847.pdfIn PDF document text
    • https://witiderinusoj.weebly.com/uploads/1/3/1/4/131483097/6e08c78429ee.pdfIn PDF document text
    • http://lumacy.site/what_is_an_example_of_nonverbal_communication0go33.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468823/normal_5fd0e3828dcaf.pdfIn PDF document text
    • http://dkblogin-de.com/99005685126gc1ty.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365653/normal_601250c95032e.pdfIn PDF document text
    • http://pixunune.sportsontheweb.net/xebigajisari.pdfIn PDF document text
    • http://dasezin.getenjoyment.net/continuous_casting_process.pdfIn PDF document text
    • http://idealslimitalia-ufficiale.site/mini_14_vs_ar_15_reliabilityp4oq4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/satudifin/95520576851.pdfIn PDF document text
    • https://s3.amazonaws.com/tixedujegibex/medical_treatment_authorization_form.pdfIn PDF document text
    • https://s3.amazonaws.com/vosimalume/madurowekunemogizoworu.pdfIn PDF document text
    • https://8767aa75-4bd5-48c0-94ca-24e983238001.filesusr.com/ugd/debdc1_4e40724807ee4265aabd4d3001fbc379.pdf?index=trueIn PDF document text
    • https://2d841ef3-a248-4e6a-996b-2d54d6713fdd.filesusr.com/ugd/1decf9_f0c04ffa06714104a5a1d762931932d5.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mefonevimimix/mejigefowe.pdfIn PDF document text
    • https://s3.amazonaws.com/nilafafakem/xesibasudupim.pdfIn PDF document text
    • https://d12e84a0-9808-45da-82c6-613dfe540d1b.filesusr.com/ugd/dc8a8e_0efc6a88f59e46228087b87262e20d55.pdf?index=trueIn PDF document text
    • https://80172413-d145-4b71-b7cf-4a007d76ad29.filesusr.com/ugd/cacfd7_5c8dbaa8481143e3861fb00a606e1084.pdf?index=trueIn PDF document text
    • https://4779f2f8-a33e-4327-9c78-21ee0bcf4620.filesusr.com/ugd/31bf02_07a6d6d9fa3e447b9db448f37835fe08.pdf?index=trueIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001191f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1191F 5324 bytes
SHA-256: 93cb500c3b14cedc90feaeadbb65a0a28a8f4c70c43a9d7128a2e7ed9ad97ad5
font_01_sfnt_off00012b20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B20 10700 bytes
SHA-256: e756af5527c42b7c011fcfa7b8e6dae083a3004c59ce6776f5629f384d3267e3
font_02_sfnt_off00014f9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14F9E 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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