Malicious PDF — malware analysis report

Static analysis result for SHA-256 87c29e4a4ceb9b80…

MALICIOUS

PDF

97.9 KB Created: 2021-03-22 10:19:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 052c1abe82c0458772e05a12c1025c09 SHA-1: 96418735e9537899ab09ee4320e5bf3df200b9d8 SHA-256: 87c29e4a4ceb9b80d302b850ea4e7af530aa1e64d5d43d77f8a05de5834ef57e
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, dafemum.ru, disguised as a dictionary lookup. This strongly suggests a phishing or malware distribution attempt. While no scripts were explicitly extracted, the PDF structure and the malicious URL indicate a high likelihood of malicious intent, potentially involving embedded JavaScript for exploitation or redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://dafemum.ru/award?keyword=merriam+webster+medical+dictionary+pdf In PDF document text
    • http://vatidenow.medianewsonline.com/how_to_clean_melt_burner.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481068/normal_6022c6f1db7cf.pdfIn PDF document text
    • http://komozazene.getenjoyment.net/43564895455.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467561/normal_5fe90b216b23f.pdfIn PDF document text
    • http://tijudiwulewanuw.getenjoyment.net/fender_hot_rod_deluxe_30_watt.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369327/normal_5fe5466477000.pdfIn PDF document text
    • http://kenugizi.getenjoyment.net/12998821494.pdfIn PDF document text
    • http://pojibuvuj.mygamesonline.org/72769342098.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/xupimaral/follow_up_email_templates_for_customers.pdfIn PDF document text
    • https://s3.amazonaws.com/ganubatebedoxez/cooks_essentials_pressure_cooker_recipe_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18a73a96-0624-44a7-9e5b-8da4ea790ab6/xoxeliwamoxebexalumozifuw.pdfIn PDF document text
    • http://bamonoxo.onlinewebshop.net/kixekarimufefig.pdfIn PDF document text
    • https://s3.amazonaws.com/zatasipezeg/vizio_sound_bar_price.pdfIn PDF document text
    • https://s3.amazonaws.com/wovitiku/66860227959.pdfIn PDF document text
    • http://tisavan.onlinewebshop.net/31130465441.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3eec100-862d-4954-8b9c-f47115451836/what_is_another_word_for_works_together.pdfIn PDF document text
    • https://s3.amazonaws.com/peveziwoguxuzam/christian_songs_flute_sheet_music.pdfIn PDF document text
    • http://sebokegekesuded.atwebpages.com/tasodelufug.pdfIn PDF document text
    • http://wugetad.myartsonline.com/59299562497.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fabb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFABB 21492 bytes
SHA-256: 9157fb1ee7d7ad2bb5d158f47007dde237cd677c10064c533366e9818c29a11c
font_01_sfnt_off00013f99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F99 5640 bytes
SHA-256: e75e47937bb8078f34b6448a3c96a364fa8296c1cdb94f8db65164bc6426a90e
font_02_sfnt_off000152cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x152CF 11300 bytes
SHA-256: 96aabbed636a5f2ef2fefca7ddd439c1e63d6fb483afa13688109f9fca6ec252

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