Malicious PDF — malware analysis report

Static analysis result for SHA-256 29869e2e31e338ae…

MALICIOUS

PDF

76.3 KB Created: 2021-02-01 12:14:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 2c7014e9862b4d71d6933ce40d65d645 SHA-1: 9b117a3d70d321becaee00a3f49f78d78a40557a SHA-256: 29869e2e31e338ae06269026d47e324d7cd41424b3efd9a98b7e544d4ba37517
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to domains commonly associated with SEO link farms and phishing. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and numerous external URIs suggest an attempt to redirect users to malicious content.

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://bologen.ru/wb?keyword=move%20android%20to%20ios%20after%20setup PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4369487/normal_5fc8325472e13.pdfIn PDF document text
    • https://wenuzivubog.weebly.com/uploads/1/3/5/3/135392435/nilevepu-xebasitujiw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382948/normal_5fcddf09b2cf7.pdfIn PDF document text
    • https://dosoxeluniwipeg.weebly.com/uploads/1/3/3/9/133997743/65bb5b.pdfIn PDF document text
    • https://cdn.sqhk.co/sururezog/jbjiKMo/20052076610.pdfIn PDF document text
    • https://cdn.sqhk.co/vopunokapire/jbGghia/sawupuluzugatozovo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484618/normal_5fcc0dac21b02.pdfIn PDF document text
    • https://vefoxetewezelir.weebly.com/uploads/1/3/1/4/131483279/1437653.pdfIn PDF document text
    • https://gidafefutor.weebly.com/uploads/1/3/4/0/134040883/komidis.pdfIn PDF document text
    • https://cdn.sqhk.co/xiroxozalal/6j5ytPb/zurubogufamore.pdfIn PDF document text
    • https://dutudofedibajun.weebly.com/uploads/1/3/2/8/132815365/jawisunajakujokarima.pdfIn PDF document text
    • https://nibiromevisike.weebly.com/uploads/1/3/5/2/135299411/fatetiguro.pdfIn PDF document text
    • https://rejileju.weebly.com/uploads/1/3/4/3/134335231/dusus_vipujizaxalewe_lituzadon_tutuvujuwo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471230/normal_601133dc31204.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/zaxefemebidaz/earthworm_anatomy_worksheet_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/divelatoxa/10469681960.pdfIn PDF document text
    • https://s3.amazonaws.com/vibasujefir/auto_background_blur_camera_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/nisiwanolom/18137215966.pdfIn PDF document text
    • https://s3.amazonaws.com/tifuwuw/rogers_london_tv_guide.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_off0000ef91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF91 5068 bytes
SHA-256: 2e24547e3db89387b462e5b1e67a08fb3b7c87353d052941c8df348d2b67cdd9
font_01_sfnt_off000100f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100F3 10400 bytes
SHA-256: 5a4e642c7885c16c836aee2c62b9494ff8baa2b8be66f1930bffacb6cd904e0a

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