Malicious PDF — malware analysis report

Static analysis result for SHA-256 6106b0ce54b871da…

MALICIOUS

PDF

98.3 KB Created: 2020-11-18 03:50:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: d5b96ef916c99d44ec7249b5c9e3782f SHA-1: 969faa054e79fa7b83e81a9a2785b79915bea53a SHA-256: 6106b0ce54b871da7d33fc31566ab9764e0c9aba274b153227bd5d55d52ba54e
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 numerous external links, with one heuristic specifically identifying a 'PDF link farm'. The embedded document body, though heavily obfuscated, contains text related to 'Pectus excavatum chest wall deformity', suggesting a lure. The presence of external URIs and the ClamAV detection as 'Pdf.Phishing.Trojan' strongly indicate a malicious intent to redirect users to potentially harmful sites.

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://trafficel.ru/aws?utm_term=pectus+excavatum+chest+wall+deformity PDF link annotation
    • https://dasasaperot.weebly.com/uploads/1/3/4/6/134665710/8938133.pdfIn PDF document text
    • https://pivokobofu.weebly.com/uploads/1/3/4/6/134648089/9772033.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/d5f28db1-0378-4ed0-981e-cca86c98d6b9/petetojuserinotet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/55c5eafe-1232-47e7-ad9c-5c5078c5e6d1/90542886736.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4dff6cf5-9cf5-4f92-bd3a-eaaf36a9b170/8452979412.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/477ad55d-8ae7-4bf7-8345-b5f625501f8f/sexituputubadutame.pdfIn PDF document text
    • https://s3.amazonaws.com/takurugilij/58421323621.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f767d4c-bc84-4370-a626-0a53232d3b71/33953821349.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/41db1e48-7d47-4ec8-8f76-3eb9a6a755f6/jarenozopona.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db5b0b82-67da-4601-a06d-fdbce0c7c610/21183688430.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/57ce324b-75bd-4ccb-85fc-80e77b8522f0/blue_bottle_jellyfish_found.pdfIn PDF document text
    • https://s3.amazonaws.com/julaxel/berserk_volume_3.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/03d73e7d-875b-459d-a230-b6d32f8a3a73/vodumuzugozofepexizer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8f5c81a-1f6a-451a-91a7-16f7ecc1bf08/soundarya_lahari_mp3_free_download.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_off0001409c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1409C 5584 bytes
SHA-256: 2cfdc1508bd4c029ab97b89f95db679ca6152580b30574931cdac0891dcd701c
font_01_sfnt_off0001538d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1538D 13024 bytes
SHA-256: dc9cb8093ae14baa8401f7142fbf3fa048780dcf9c9990158f14167188107b4f

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