Malicious PDF — malware analysis report

Static analysis result for SHA-256 d00379ff53189582…

MALICIOUS

PDF

78.7 KB Created: 2021-01-06 04:20:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9ad36104a3f04dc2807a1a27f846dcde SHA-1: e86c416a1400a7abeac24c509b9a26b49aea565f SHA-256: d00379ff53189582517b06f5b742b94a0568c5934f1b214d26c428ad85610321
214 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, with at least one pointing to known malicious redirector infrastructure. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external PDF links, suggesting an attempt to drive traffic to various sites. While no scripts were explicitly extracted, the presence of embedded URLs and the malicious redirector link strongly suggest a phishing or redirection attack. The ML classifier and ClamAV detection further support the malicious nature of the file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/aws?utm_term=objection+handling+ppt+template
    • https://static.s123-cdn-static.com/uploads/4404296/normal_5feb4e10e15e5.pdf
    • https://cdn.sqhk.co/jabosuve/ii7iShD/forest_hd_live_wallpaper_download.pdf
    • https://cdn-cms.f-static.net/uploads/4467577/normal_5fc1a7e633f47.pdf
    • https://jitolabifu.weebly.com/uploads/1/3/1/6/131607188/c0d46f6c5429d47.pdf
    • https://jesebumu.weebly.com/uploads/1/3/4/6/134617302/kuvipimekezokul_buvemorewu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/beebefc0-0747-49c2-bec2-9afa7fb84768/bitugafafotibemojisubuf.pdf
    • https://uploads.strikinglycdn.com/files/26297b35-158c-4761-a94b-bd4e7b17b094/gomitoginelepipapap.pdf
    • https://uploads.strikinglycdn.com/files/a9ed8fb8-df34-492a-a0e9-7242e359b695/swf_to_mp4_converter_offline.pdf
    • https://uploads.strikinglycdn.com/files/3c557e4d-3e3e-41a1-a0b5-b7d69d7b348a/33170492922.pdf
    • https://uploads.strikinglycdn.com/files/cb017e12-f39f-4e53-88f1-ed3c0e7274fa/ab_rocket_twister_abdominal_trainer.pdf
    • https://uploads.strikinglycdn.com/files/e7da4aa9-59aa-4c4c-917a-24743af0d8f2/zeponazitisaludaxuxuluro.pdf
    • https://uploads.strikinglycdn.com/files/d33676b4-1ceb-4187-8e91-cf600436c02b/51125669980.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e8b3.bin
1071a6fa25dead07e61931a236c5431eb11fe16a1c5c7b0e7d4818a89e9c2f4b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE8B3 5244 bytes
font_01_sfnt_off0000fa54.bin
77607ecaf0d45e4b0152b0a06b11f19519d2b505cb314dc00a04c3c44f4b0b5d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFA54 11372 bytes
font_02_sfnt_off00012026.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12026 4324 bytes

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