Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3c6aa75f4ceaf5e…

MALICIOUS

PDF

74.1 KB Created: 2021-03-18 01:50:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 0d39163f16f41d6064fbdb4514ac6700 SHA-1: 12e49b5f43d8d0d5348cb90732ef7d39636d0295 SHA-256: a3c6aa75f4ceaf5eb0010f8a35145a695a0f4773c0413fa89d29534b4a635e18
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 0.9999

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://lozipotod.ru/strik?utm_term=lord+of+the+flies+1990+film+cast PDF link annotation
    • https://dunudafulu.weebly.com/uploads/1/3/1/0/131071166/lodowuwulez.pdfIn PDF document text
    • http://riwozizedilar.mygamesonline.org/orthographic_projection_notes.pdfIn PDF document text
    • http://siviveko.getenjoyment.net/tropic_of_cancer_in_india_degree.pdfIn PDF document text
    • https://taxikifa.weebly.com/uploads/1/3/4/4/134496463/jezuxil-terivadawidelez-nasemeki-mizabibafed.pdfIn PDF document text
    • http://kitafoged.medianewsonline.com/tobodut.pdfIn PDF document text
    • https://xevefozivoro.weebly.com/uploads/1/3/5/3/135339272/sanupez_muwajib_nirazizesa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444117/normal_6050b89246cb6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387920/normal_600458cc0597e.pdfIn PDF document text
    • https://lumixomenuvaw.weebly.com/uploads/1/3/4/7/134745504/1107348.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/feb91122-1c26-45ae-9133-086fe40a53b2/bilesibuvaxuwoja.pdfIn PDF document text
    • https://s3.amazonaws.com/nonabafat/amagami_ss_op.pdfIn PDF document text
    • http://gozudil.onlinewebshop.net/wodixebiwanesewo.pdfIn PDF document text
    • https://s3.amazonaws.com/gonafoziguwewe/badoo_apk_gratis.pdfIn PDF document text
    • https://s3.amazonaws.com/tozaduliwubega/12578721962.pdfIn PDF document text
    • https://s3.amazonaws.com/xukonakefules/how_to_use_dewalt_dwe7491rs.pdfIn PDF document text
    • http://refusunono.onlinewebshop.net/minetigu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/076a53bd-2e7c-4b10-9d47-ed8fbab86145/which_sentence_is_an_example_of_an_objective_statement_4.3.3.pdfIn PDF document text
    • https://s3.amazonaws.com/setigafat/72149363838.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_off0000e367.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE367 5552 bytes
SHA-256: 1e5210d50d47e7a6e423e97ee0adfe739022b6b280a6247f7d3b6e6491cb0dc1
font_01_sfnt_off0000f623.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF623 11116 bytes
SHA-256: 880d85f013228953d255c229cd57b32fc6e5ad5fbb4f5db2c7fdd45415ab9fe5

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