Malicious PDF — malware analysis report

Static analysis result for SHA-256 6143d09a57459cd4…

MALICIOUS

PDF

123.9 KB Created: 2021-03-01 00:54:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 573d4a062ff44ac05367dbe91cf7789d SHA-1: 24ca0e1557b9c1f462ed97c7a13f62ac843995e3 SHA-256: 6143d09a57459cd470d606595665017b9bf13b919e44417a72ad43017e3eabc0
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, a common tactic for SEO spam or phishing campaigns. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as a phishing trojan. While no scripts were directly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://lozipotod.ru/123?utm_term=babybjorn+baby+carrier+original+front+facing PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4451970/normal_5fdf3c4e24588.pdfIn PDF document text
    • https://cdn.sqhk.co/fumodolanes/ihcHM4G/photo_edit_video_song_app_download.pdfIn PDF document text
    • https://cdn.sqhk.co/zebimapajod/hf5iasb/xidepunixiwimulatam.pdfIn PDF document text
    • https://jizanisa.weebly.com/uploads/1/3/5/3/135386656/3388b823.pdfIn PDF document text
    • https://cdn.sqhk.co/nonuripot/jieNXif/vogidilufefikafuku.pdfIn PDF document text
    • https://cdn.sqhk.co/poxofufiko/bcJLdhf/what_does_democracy_mean_in_america_today.pdfIn PDF document text
    • https://cdn.sqhk.co/velizovatim/jiifhbX/stickman_backflip_killer_4.pdfIn PDF document text
    • https://cdn.sqhk.co/tinawegu/jgdGVNQ/bafoledajizisavibokavim.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480399/normal_603c09cbd2e2b.pdfIn PDF document text
    • https://cdn.sqhk.co/beratinuga/VjegfGx/momomala.pdfIn PDF document text
    • https://cdn.sqhk.co/fevazufalul/ghhdB3N/grist_house_galactic_ghost.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459479/normal_5fcc9e0f163f1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370088/normal_601d3e9b2a5a5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389823/normal_6018d35662855.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/pirofopafu/kiragesin.pdfIn PDF document text
    • https://s3.amazonaws.com/jimugivos/nuvelo.pdfIn PDF document text
    • https://s3.amazonaws.com/jenagubadopi/galojesuxol.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000167fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x167FA 15512 bytes
SHA-256: 52f435c6d3fbbe917d75241d79c13b2014be31a13a9d2acf5d09c9a4f1a6a3ec
font_01_sfnt_off000198d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x198D3 5024 bytes
SHA-256: 762d1e58721e62e7ad77d3c3177067ee6227fc12b3b9fcdd16a5f75e1d637136
font_02_sfnt_off0001aa03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AA03 11804 bytes
SHA-256: 565073332ecb44118c8f8f79c9423e0966cc8a23608ff6d72d0ef1ad1cccb03b
font_03_sfnt_off0001d1d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D1D7 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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