Malicious PDF — malware analysis report

Static analysis result for SHA-256 494d8c7d0db9ec28…

MALICIOUS

PDF

76.9 KB Created: 2021-03-04 15:15:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: ed7d61eb854c3545ae6bdcc1123de729 SHA-1: 2df40b8d4c22d4600f4a737bf2c75fe94c0df0bc SHA-256: 494d8c7d0db9ec288f5d5e29eb1f462d9f6148e43d5bba9e292fa58b4e4bacd6
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm or phishing operation. The document body, though partially corrupted, includes a search query related to a common health concern, likely intended to deceive users into clicking malicious links.

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 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://nipisod.ru/wb?keyword=why%20are%20my%20legs%20red%20and%20bumps%20after%20shaving PDF link annotation
    • http://sukutoxuwurif.mywebcommunity.org/aw_tozer_devotional_app.pdfIn PDF document text
    • http://mebovedu.getenjoyment.net/time_warner_remote_volume_not_working.pdfIn PDF document text
    • http://zememor.sportsontheweb.net/40622854556.pdfIn PDF document text
    • http://mubufuzit.22web.org/poulan_pro_pp4218avx_manual.pdfIn PDF document text
    • http://lezigovedavide.getenjoyment.net/3324699457.pdfIn PDF document text
    • http://belplitka.ru/66109262252aug3j.pdfIn PDF document text
    • http://hookup671.site/55858687213r6ayo.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/waduzirader/81290195427.pdfIn PDF document text
    • https://s3.amazonaws.com/tevomenil/5249984764.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a964d131-4773-4b08-b225-80de557e544f/1412020697.pdfIn PDF document text
    • http://xaduneraxoden.rf.gd/luxuredejawiwopowu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb46912b-83ad-4da8-95bc-f0f9c2936b09/what_impact_did_the_development_of_railroads_have_on_georgias_growth.pdfIn PDF document text
    • https://s3.amazonaws.com/wewuxuviwar/algebra_worksheets_maths_aids.pdfIn PDF document text
    • http://tososite.onlinewebshop.net/zejulebuzajul.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a4abc69-e44a-4117-8a04-b4097664e64b/fakigofub.pdfIn PDF document text
    • http://merojupamen.epizy.com/uh_art_history_degree_plan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44ce6b8e-8c54-4660-8566-5102867d9766/44001297300.pdfIn PDF document text
    • http://jejafajiw.rf.gd/air_america_tv_series_episode_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/42ae1832-ca52-4bb1-8ef0-093c4ce90b67/govixewuf.pdfIn PDF document text
    • https://s3.amazonaws.com/libowebujakux/animation_movies_2017.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/491d28c2-24fb-46eb-920c-2c2091c13a14/xumifijuv.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_off0000ef6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF6C 5768 bytes
SHA-256: f639bdc4fddfc7c5e1ef049a88fe2ec403231e9763b7081d67f3027b75e801af
font_01_sfnt_off00010300.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10300 10400 bytes
SHA-256: a96b6a84d7baa9532cfdd116a32a7c5aaf41d6b3c034b81b0775e063f38873d6

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