Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2d8b74bba94154e…

MALICIOUS

PDF

59.9 KB Created: 2020-11-12 20:39:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 5b290653e6adf328d00c1093251b51e5 SHA-1: 22845eb26b45213c5fe47ea5371b5ffc1096c710 SHA-256: e2d8b74bba94154eed76a2ef3a309f9185a91162a0653bd0d634d90541bc4ce0
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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/123?utm_term=myrtle+beach+jail+lookup PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369908/normal_5f880fe82b9ac.pdfIn PDF document text
    • https://sonujesenusa.weebly.com/uploads/1/3/4/3/134344018/bavupefoxofatari.pdfIn PDF document text
    • https://bozaxadoduzake.weebly.com/uploads/1/3/4/3/134306622/fe906d5e9ad.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/zedilegol/ring_of_jumping_pathfinder.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7159dc4f-7e7e-4b2d-87b8-a87a8b74b3ea/54945170160.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6284874e-69df-46e2-87e6-a98183f77a83/priyanka_chopra_net_worth_2016.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/634b553c-49ea-4834-9a54-dd8db205fae0/fiwax.pdfIn PDF document text
    • https://s3.amazonaws.com/baritexovopa/nespresso_inissia_user_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18d3876a-d33f-4bec-97af-be38cb7991b8/46824800464.pdfIn PDF document text
    • https://s3.amazonaws.com/mokixetat/metformin_davis_drug_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/metubevozisul/47988601296.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e24a9af5-d156-4098-b3a3-f137a2496180/xukoni.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/89ceb499-c50e-4124-81f6-9dc1c2d25a0a/kindle_fire_user_manual_instructions.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_off0000af28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF28 5232 bytes
SHA-256: f17b951c8198eff3fb4460bb7286989367462ff53eaef1ba7e8d4fb41c296ad8
font_01_sfnt_off0000c104.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC104 10004 bytes
SHA-256: 4ddab489789932675c7413d38b213476a96566e508319f61ca838a64b1407716

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