Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d69966f3d6e1757…

MALICIOUS

PDF

75.6 KB Created: 2021-02-07 10:51:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 1d69bbf9ed5efcbca770f921b414d19f SHA-1: 0a3ffad66c142c6ff00b12a4f33839d02e5448cc SHA-256: 0d69966f3d6e1757cc3bc02b80fa43bb82bee3b138257901b7cbc31052e391b9
126 Risk Score

Malware Insights

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

The PDF contains multiple external URIs and is flagged as a link farm on disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The document body, though heavily obfuscated, contains text that appears to be a lure related to a product commendation, likely intended to trick the user into clicking the embedded malicious links.

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://maypoin.ru/123?utm_term=2013+fuji+cross+1.1+commendation PDF link annotation
    • http://teagreen.space/puwurikogogojelanesixtf.pdfIn PDF document text
    • https://gabanifuvumot.weebly.com/uploads/1/3/4/5/134588994/nuxuzinerimalotutaze.pdfIn PDF document text
    • https://tabupuja.weebly.com/uploads/1/3/4/6/134647436/nisozavi_ziwonogo_mazojibawapexu_tukepop.pdfIn PDF document text
    • http://normal-id.com/lejixogodijekolemavh3gxk.pdfIn PDF document text
    • http://strita.space/accident_reporting_centre_burlington_ontario5bqwb.pdfIn PDF document text
    • http://itfamily.info/xiaomi_ddpai_mini_one_reviewgleo2.pdfIn PDF document text
    • http://furniture21.online/descargar_corel_draw_x8_gratis_en_esj35pc.pdfIn PDF document text
    • https://vesanawe.weebly.com/uploads/1/3/4/6/134602832/951b663.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fukokikedusej.epizy.com/diwakijato.pdfIn PDF document text
    • http://zavodopivuzaraf.epizy.com/captain_tsubasa_game_ppsspp_android.pdfIn PDF document text
    • https://s3.amazonaws.com/gawabog/glass_guide_car_valuation_book.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_off0000e81f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE81F 5640 bytes
SHA-256: 58343021730abbd62934598b4fc1f390625e0022a4d204c8d5a3fabf71676b09
font_01_sfnt_off0000fb47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB47 11540 bytes
SHA-256: 61f3734255bb457160c964c44f201732de4ae2a9f22fd34c976bb22030c891ae

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