Malicious PDF — malware analysis report

Static analysis result for SHA-256 c03bbc6ba3f8e6f0…

MALICIOUS

PDF

69.3 KB Created: 2020-11-26 03:41:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: e79c3dec853c11e0e1b920cc24a21e08 SHA-1: 91ee04473c0eaf68a2384c0a7297e9d7c2ed34f8 SHA-256: c03bbc6ba3f8e6f09339ca6cd2bd01a0cdbd4784aa8cb26815e3def9da031ea2
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://traffine.ru/strik?utm_term=we%2527re+off+to+see+the+wizard+charmed PDF link annotation
    • https://wulonuvesiga.weebly.com/uploads/1/3/4/3/134362584/buzexivutot_pafesogo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369773/normal_5faa060db7dfc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370543/normal_5f932b43d62de.pdfIn PDF document text
    • https://zokunokakepano.weebly.com/uploads/1/3/4/3/134353677/6933c766.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/pazovugal/wow_classic_best_priest_dps_talents.pdfIn PDF document text
    • https://s3.amazonaws.com/kovezodepugov/autocad_2015_crack_version.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/11909eed-cd28-4712-8bb2-50317b9750fa/project_management_the_managerial_process_7th_edition_download.pdfIn PDF document text
    • https://s3.amazonaws.com/wukevirenesu/nipodarafamativawutadagi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/534b5765-82aa-4a07-aece-0bc22462e7e9/1817211244.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a881c04c-211c-4491-b194-58fc496c8033/jijosigozadilenikadiz.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/list_of_jumbled_words_with_answers.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_off0000d05e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD05E 5416 bytes
SHA-256: 131c50db21dbe5064cfe9864dc22881a62f2882fa116816e9f0e03ba0674063b
font_01_sfnt_off0000e2cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2CD 11908 bytes
SHA-256: 870ed7a0ac9ef87d11f169641990db8608e8b0c3da2c876adcb77d4af737f2a4

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