Malicious PDF — malware analysis report

Static analysis result for SHA-256 23656ed1da7da062…

MALICIOUS

PDF

67.3 KB Created: 2020-12-16 01:16:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: ad3aeec33f3676c580763485d603affb SHA-1: 975d4d00a15fba555206828100450e2525d780c6 SHA-256: 23656ed1da7da062d7142fb6716910ee01b3820820e8d3a6e0647aad8ab44608
164 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 and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://trafffe.ru/strik?utm_term=dell+latitude+d830+drivers PDF link annotation
    • https://dagigofeno.weebly.com/uploads/1/3/4/8/134887245/jatujaz.pdfIn PDF document text
    • https://kibutabez.weebly.com/uploads/1/3/4/4/134438896/bomelijefofufamojun.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/c944d58e-9270-41c7-af65-ff7eb7775e61/south_mecklenburg_high_school_yearbook.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef4b3527-7e47-46d9-a6f2-a9687b5de686/davinukitunevotuwewan.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc55cc72e34347c7062119a/t/5fc6e2e91d106d256bb2e959/1606869737864/zombie_chase_5k.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0270cd2-ee1a-4046-b332-44cc202e1cf9/baixar_bloqueado_scribd.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/967b6f2d-57a0-423f-b1de-a6cc91d7acbe/44855859043.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d742e163-3db2-422e-a77f-d5aa56966989/synonym_for_teamwork.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/667b09a2-b485-4179-a9ec-c3baab471397/xitejorek.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/113899af-e21b-4275-a72c-591b2c0dc930/shingeki_no_kyojin_saison_3_vostfr_14.pdfIn PDF document text
    • https://s3.amazonaws.com/juvosi/vopolakogiraduwo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7882f14a-6fdb-4040-8327-27bc3280c7e5/eyeclops_night_vision_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/89846f13-d48c-4dd0-a70b-5016da2842a5/27590604225.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc587e192c50b1a1e96d7b5/t/5fce05f9c00f007cea0e11ef/1607337466776/sales_pulse_primary_school_login.pdfIn PDF document text
    • https://s3.amazonaws.com/tozaduliwubega/gepofusomepegi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83a2c29d-9ab8-4e26-ae76-c1515a205917/91712253912.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/baab7660-d249-430a-80c9-9474f8738612/7690166845.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c8a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8A6 5376 bytes
SHA-256: 49150e0a8a806ca5feb5cd465b84ab9699b9c957ac7d639cd23c7141a15a9375
font_01_sfnt_off0000db0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB0C 10904 bytes
SHA-256: d822d45c5215dba796c244627aac59ac2d08669cb8b19a66cadd8e6fe39114ca

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