Malicious PDF — malware analysis report

Static analysis result for SHA-256 fec7678a939e4f98…

MALICIOUS

PDF

72.4 KB Created: 2020-12-22 07:00:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: d4d2c3479ad15ee1ab621d85b1bd676e SHA-1: e9eb491065f37dd2ed1aedb93a345aa6e0d9e09a SHA-256: fec7678a939e4f982a51f43437e59e0747a38d1e51c046152eacb647d7bb0fa4
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, specifically as a phishing or trojan delivery mechanism. It contains numerous external links, suggesting a link farm or redirection strategy to obscure the ultimate destination. The primary URL, 'https://traffking.ru/strik?utm_term=best+video+editor+clip+editing+app+with+music', is likely used to lure victims by impersonating a video editing app, a common social engineering tactic.

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://traffking.ru/strik?utm_term=best+video+editor+clip+editing+app+with+music PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4403543/normal_5f9f5bdccbc8c.pdfIn PDF document text
    • https://wimugedi.weebly.com/uploads/1/3/4/7/134725841/fcc869.pdfIn PDF document text
    • https://dapijapivabug.weebly.com/uploads/1/3/4/3/134338952/kexabititat.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416806/normal_5fd1a7ac0b10c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369777/normal_5fa42e3518e4c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467576/normal_5fe15808456c2.pdfIn PDF document text
    • https://tonurokekar.weebly.com/uploads/1/3/4/4/134456200/mivim_zapod_wafigexov.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500440/normal_5fd2020e856d2.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/jotizifime/debawuxedezowipivota.pdfIn PDF document text
    • https://s3.amazonaws.com/wupixufekijax/newetaruk.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc29c38ff13940aa24a8d75/t/5fc4e4113c6ccf69f3f84287/1606738961336/frs_for_sale.pdfIn PDF document text
    • https://s3.amazonaws.com/juvetaso/periodic_table_chemistry_puns_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/vavale/29696042443.pdfIn PDF document text
    • https://s3.amazonaws.com/falevi/appvn_download_apk_latest_version.pdfIn PDF document text
    • https://s3.amazonaws.com/wemazun/tibewupidesivafotavar.pdfIn PDF document text
    • https://s3.amazonaws.com/divelatoxa/semantic_feature_analysis_aphasia_template.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_off0000ddc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDC7 5688 bytes
SHA-256: 239b283512c5cf3ff9c80fbf05be2dbb525517e1b1806742b02694b5f8558504
font_01_sfnt_off0000f10f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF10F 10336 bytes
SHA-256: 21554b63f228de7583161027f8bad0dc5498821a33cdf62c7fa837e579d2ff37

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