Malicious PDF — malware analysis report

Static analysis result for SHA-256 09bb9ffe75a341a4…

MALICIOUS

PDF

69.0 KB Created: 2020-12-18 00:14:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 39c79447c41f2a164c981ba18d9b5fbc SHA-1: 9655474de0c5922d06acc9f3d786ed80954adebf SHA-256: 09bb9ffe75a341a40869a5c5e9ae4cf5e84fb49435b03901c80390def0f7b08e
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains a large number of external links, flagged as a 'PDF_SEO_LINK_FARM'. One of these links, 'https://traffking.ru/123?utm_term=sanlucar+de+barrameda+restaurants', is identified as an external URI. ClamAV detected the file as 'Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0', and an ML classifier also flagged it as malicious. The presence of numerous external links suggests a phishing or malicious redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffking.ru/123?utm_term=sanlucar+de+barrameda+restaurants PDF link annotation
    • https://sosegesidor.weebly.com/uploads/1/3/4/4/134465043/duvitodumabop_tosev_vobulewajejeg.pdfIn PDF document text
    • https://sexegunu.weebly.com/uploads/1/3/3/9/133997610/zumog-zetegabo.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/bc636127-bdc9-46e7-995b-8e5a3872be84/moxomik.pdfIn PDF document text
    • https://s3.amazonaws.com/vibasujefir/aptitudes_de_un_lider.pdfIn PDF document text
    • https://s3.amazonaws.com/solonebosop/marma_points_of_the_head.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/15b5ae5c-119b-4adf-a0b3-10a24c3784b8/22175335531.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/60f813fa-ed85-4118-aed7-7c2d25fa0e71/solar_storm_survival_guide.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc509327848ba205d335311/t/5fd6eb9ed654060362dc8197/1607920545471/3695720512.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8cff93d3-a0c9-4bbb-979e-5d2bec1a1ebb/tuvexetiwabipapal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/82eaead8-435e-4038-afad-111d82634ed9/your_name_here_and_the_argonauts.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcf0f58cb11b25c09ac94b/1606217973852/77657587160.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ddcce8a-b301-43d0-a77e-d7b06bad15ce/metimetor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d45890b4-ebea-4534-af80-ffff639bf67e/sizajupijuvuju.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_off0000cdd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDD4 5328 bytes
SHA-256: e2cedf628f15d000f7d7aed163b4743541acf7fb5c12bfba3c79f09c16e36601
font_01_sfnt_off0000dfd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFD7 11536 bytes
SHA-256: ece8d2266be5cbe9d8d35a6792fac8b734149a80310f5b62c2baaa281b14df5b

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