Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb232be5140dcbd8…

MALICIOUS

PDF

75.2 KB Created: 2020-12-31 07:55:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 60fca8460f4bd2a4a386a2a0f904e232 SHA-1: 16edd872b250ebc3195bb6f750adb1880f3ad847 SHA-256: fb232be5140dcbd83ddcd981e7020b27c0b0d8bf5d0b3a118ce575dd3acc2a84
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://cctraff.ru/123?utm_term=the+liaison+officer+fema'. This indicates the document's primary purpose is to redirect the user to a potentially harmful site. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the nature of the redirector suggests a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://cctraff.ru/123?utm_term=the+liaison+officer+fema In PDF document text
    • https://cdn.sqhk.co/zezoxomop/dhhhjgh/ant_farm_kit_reviews.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412387/normal_5fdc25d677c61.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465556/normal_5fb84af591808.pdfIn PDF document text
    • https://cdn.sqhk.co/naxopesareg/SH1ukVH/37389065192.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/2df1266f-8cae-4745-b087-418bfa036627/the_empty_space_peter_brook.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18287088-c284-4ee1-a7bf-46300321e108/xuwovofinizutolateputa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/53d57d13-44be-4a87-954b-28acb09b9587/savings_tracker_excel_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad314ac9-3b41-41fc-8a6a-62f9d9dff662/six_thermodynamic_states_of_the_same_monatomic_ideal_gas_sample_are_represented_in_the_figure.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a05ec0e9-6f01-46b3-9178-3c92b9f4c67b/zedge_free_ringtones_app_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/434cd028-38c4-47eb-9bac-4bb869ae6f8a/jediwefumogif.pdfIn PDF document text
    • https://s3.amazonaws.com/viromibukoleliw/firefox_for_pc_64_bit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b2f13f4-9498-4905-befc-dcb1a4a46d8a/18476005145.pdfIn PDF document text
    • https://s3.amazonaws.com/pirosisob/daily_puzzle_answers_word_crush.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/79c28cc8-848a-4dba-8e39-c8b7a9f2fbd7/wimovupuruzinaligifu.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_off0000eb3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB3D 5072 bytes
SHA-256: 3cf0e638f6bfa63f1d6c2369cbf155c3d07460a48c650dc5f924b7b463e9f390
font_01_sfnt_off0000fc51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC51 10408 bytes
SHA-256: a415a90520edde74af99422a47cf6560416fd3f9cc7f3f38f2a5c7a2429f6e45

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