Malicious PDF — malware analysis report

Static analysis result for SHA-256 198ee1235ce5d978…

MALICIOUS

PDF

74.8 KB Created: 2021-03-02 11:51:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 745ddbd21ce1ddeb06046dedae31d335 SHA-1: 433bc9059d151c0769a7dd3f2c25dfccf259f62d SHA-256: 198ee1235ce5d978abcafb057e5fc7d2d6c67ead08b4f524f49b1f69d4e7324e
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable hosting, and a high ML classifier score indicating malicious intent. The document body, though heavily obfuscated, suggests a lure related to printer types, directing users to a suspicious domain. This pattern is consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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://mezovuduw.ru/123?utm_term=what+are+the+two+types+of+printers PDF link annotation
    • https://cdn.sqhk.co/tajudozizif/hrWxha0/zumikelokijeg.pdfIn PDF document text
    • https://cdn.sqhk.co/jeforije/jibtJge/pakojofejofovesud.pdfIn PDF document text
    • http://rigoditibalun.mywebcommunity.org/land_of_stories_movie_release_date_2019.pdfIn PDF document text
    • http://gekodejevotug.medianewsonline.com/38721850861.pdfIn PDF document text
    • http://kanaxade.mygamesonline.org/wosikasaku.pdfIn PDF document text
    • http://fofiwafajelerax.sportsontheweb.net/kenmore_elite_microwave_manual.pdfIn PDF document text
    • https://cdn.sqhk.co/kugefiruxat/ychcLic/wigifekoseru.pdfIn PDF document text
    • https://cdn.sqhk.co/bafesugoguwi/5Zhgk8v/99565900055.pdfIn PDF document text
    • https://cdn.sqhk.co/lizubenesowi/ifMhfwt/time_flower_pokemon.pdfIn PDF document text
    • https://cdn.sqhk.co/zewesifadeka/ehfjcwm/papoxo.pdfIn PDF document text
    • http://kamikofonem.mygamesonline.org/adobe_acrobat_create_toolbar_acroiefavclient.dll.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jokosen.atwebpages.com/is_the_spy_museum_in_dc_worth_it.pdfIn PDF document text
    • http://bifovigavij.myartsonline.com/tissot_t_touch_expert_manual_download.pdfIn PDF document text
    • https://s3.amazonaws.com/godoremitiwuja/schengen_visa_application_form_germany_in_english.pdfIn PDF document text
    • https://s3.amazonaws.com/pubopelej/78413194224.pdfIn PDF document text
    • http://lumosaneja.onlinewebshop.net/soxokikidovuvovaropomu.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_off0000e9d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9D8 5164 bytes
SHA-256: d71e1a1c7218c51e1e4fa22b19ebf7627cd435b602a600419f0eb3c79b5000cb
font_01_sfnt_off0000fb84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB84 10284 bytes
SHA-256: ac020beee740f46f97e447b242fc6293077d3d1a90a277108037787e0be93185

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