Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb477490ead0ff07…

MALICIOUS

PDF

106.7 KB Created: 2021-01-04 21:35:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: fcd210944cac1dac0f9de7c5340c3ae8 SHA-1: 80d563f2720000a709e20a9b56e4a810d7fda127 SHA-256: fb477490ead0ff0774919060f1765442a08f8477ca81cc93239ae2135ea66902
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It contains a mass of external links, with the primary suspicious URL being traffickset.ru, suggesting a link farm or redirection to a malicious site. The document body, though heavily corrupted, contains text related to 'Odia sambalpuri song site', which is likely a lure to attract users to the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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 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.
  • 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://traffset.ru/aws?utm_term=odia+sambalpuri+song++site PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4383450/normal_5fbb7a419f8e5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419640/normal_5f9bae66cc509.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367656/normal_5f8fc5bac0020.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388173/normal_5f9cd3d6d8f07.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377933/normal_5f9a64d6ec3e4.pdfIn PDF document text
    • https://gopufijubasid.weebly.com/uploads/1/3/1/8/131856987/50697990e327.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408598/normal_5f9d1c6789329.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489734/normal_5fccef3a6c932.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475992/normal_5fb8edb28bc43.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a7d9472-bbc1-4c33-a0d9-1077ce126bc0/20711610037.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f112c1d5-92dd-4be4-b260-61d9b24dd52c/heroic_tomb_of_sargeras_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e66601a1-7f97-4da5-a399-934144add1a9/graph_square_root_of_x-5.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013b56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B56 5444 bytes
SHA-256: a43490eff039be52e320094bc008242f1898f47666ebf4a23bc33658e0938ace
font_01_sfnt_off00014db0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14DB0 3720 bytes
SHA-256: 40ef96da86b6123d577d475be460de15c41b9ca7393a8e650be4e9942aa3c64b
font_02_sfnt_off00015912.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15912 10568 bytes
SHA-256: 2e1c98fb7e88745a9b1209c235eb30306ff1bba89533dfffc83d5b86e0a1e186
font_03_sfnt_off00017d47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17D47 10104 bytes
SHA-256: 9ffebb619bad5506426ddf2e0a1c55cdb94d94935a846ddcdbf7f01cfcf76294

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