Malicious PDF — malware analysis report

Static analysis result for SHA-256 1109f4a489094622…

MALICIOUS

PDF

62.1 KB Created: 2020-11-14 06:27:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 07044df76adfd9162cdfafb363cc6a12 SHA-1: 1e6f5dbdf0d69e2278dde528e690e21ee88f954d SHA-256: 1109f4a489094622b31af981857d71a26c79bd8dbdb6f8b87c50f93a14445f95
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 0.9996

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://trafficel.ru/strik?utm_term=ppct+training+manual PDF link annotation
    • https://ligexomapaku.weebly.com/uploads/1/3/4/3/134321337/2d4ae134d.pdfIn PDF document text
    • https://xavujome.weebly.com/uploads/1/3/0/7/130739328/1582212.pdfIn PDF document text
    • https://nowakepofor.weebly.com/uploads/1/3/4/3/134369235/5193854.pdfIn PDF document text
    • https://lapufetugez.weebly.com/uploads/1/3/4/5/134599929/suferujeze.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/gomakobez/fegafemapopokidapigeput.pdfIn PDF document text
    • https://s3.amazonaws.com/kelageketisefuv/macy_s_appliances_stoves.pdfIn PDF document text
    • https://s3.amazonaws.com/zomuzigo/gradeup_static_banking_awareness.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71a4a235-fed8-4c03-a2f6-fd6b21d5b349/school_walkout_meme.pdfIn PDF document text
    • https://s3.amazonaws.com/pisik/bio_medical_waste_management_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/fedure/drive_mp4_spider_man_far_from_home.pdfIn PDF document text
    • https://s3.amazonaws.com/votubukaxogilix/sijodalabutitob.pdfIn PDF document text
    • https://s3.amazonaws.com/sukobogixe/11586648852.pdfIn PDF document text
    • https://s3.amazonaws.com/zumomasugipeno/tv_guide_topeka_ks.pdfIn PDF document text
    • https://s3.amazonaws.com/genedonapubefe/9278862007.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_off0000b36b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB36B 5076 bytes
SHA-256: f5daace3f29cba3a1416436d993aaa96042b6e5cd5a366cc74f46d01ef866246
font_01_sfnt_off0000c49b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC49B 11216 bytes
SHA-256: d0e437be4d1fced0bde8826a83ff52faa30bfcd904750fe859a91c6c7092c6af

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