Malicious PDF — malware analysis report

Static analysis result for SHA-256 66eb2a1c1678c62e…

MALICIOUS

PDF

71.4 KB Created: 2020-12-23 09:49:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d676d2d959989ee3668e3fc342a3dd7c SHA-1: 6948529bec26e6ecb3eb9e6992501f25ee223a0a SHA-256: 66eb2a1c1678c62e78924b9566fcbed57f2ae157116aa7a9a7d443ba579aa09b
154 Risk Score

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://traffmen.ru/123?utm_term=airline+high+school+logo'. This indicates the document's primary purpose is to redirect users to malicious infrastructure. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the embedded URL is sufficient evidence of a phishing or redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://traffmen.ru/123?utm_term=airline+high+school+logo
    • https://cdn-cms.f-static.net/uploads/4474980/normal_5fac480672258.pdf
    • https://cdn-cms.f-static.net/uploads/4366984/normal_5f889770d28d4.pdf
    • https://cdn-cms.f-static.net/uploads/4450424/normal_5fb401dcdd48f.pdf
    • https://cdn-cms.f-static.net/uploads/4426547/normal_5f99e54388f36.pdf
    • https://static.s123-cdn-static.com/uploads/4366309/normal_5fe18fdf1b53f.pdf
    • https://cdn-cms.f-static.net/uploads/4368735/normal_5fbe3b7e73090.pdf
    • https://cdn-cms.f-static.net/uploads/4387718/normal_5fb8815695438.pdf
    • https://cdn-cms.f-static.net/uploads/4472484/normal_5fb2b819a0b18.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/03c427db-ef38-4bc1-a234-8009f060b4bd/natidelaranidagidarozizo.pdf
    • https://s3.amazonaws.com/fulosobezur/ifrs_2_pwc_guide.pdf
    • https://s3.amazonaws.com/nijosinizo/79377309575.pdf
    • https://s3.amazonaws.com/winumigutam/determining_net_income_from_balance_sheet.pdf
    • https://s3.amazonaws.com/donarepemi/descriptive_research_methods_psychology.pdf
    • https://s3.amazonaws.com/subud/zizixid.pdf
    • https://s3.amazonaws.com/jakujakula/blood_gang_signs_easy.pdf
    • https://uploads.strikinglycdn.com/files/22ebc876-27ba-4e41-85f8-d54f657879cf/san_antonio_tx_weather_in_march.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • https://savannah.gnu.org/projects/freefont/
    • http://www.gnu.org/licenses/
    • http://www.gnu.org/copyleft/gpl.html
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ca94.bin
a606a6dede3b99472d2ac97761204782646b5f75106b48d1abccbe9a99ca9a4c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCA94 6440 bytes
font_01_sfnt_off0000da88.bin
11243041d3a1b3eb65789a75d47cc5ec1a6c77581b11f970014dbd0d71a8edef		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDA88 4840 bytes
font_02_sfnt_off0000eb03.bin
1ab40c7b7aff5499adc39a50e8ea8cf042f38329453ebf20e4d82da68e6ed235		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEB03 11324 bytes

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