Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e619d7fe63444f6…

MALICIOUS

PDF

83.6 KB Created: 2021-05-11 11:44:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: daa52fa31e0e3e677299c5498a2722ad SHA-1: 5650c59ad65ace9ab8727c510248caff0bd31e60 SHA-256: 1e619d7fe63444f6f59ed3283d0e58bee79dff7c72df518bf18228a04be2a2fe
156 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. It contains a large number of external links, many pointing to Weebly domains, suggesting a link farm or redirection mechanism. The document body, though heavily obfuscated, contains metadata related to PDF generation and search terms, reinforcing the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://golowaki.ru/strik?utm_term=pakistan+studies+book+for+bs+pdf+in+english+free+download PDF link annotation
    • https://genefitagujutun.weebly.com/uploads/1/3/5/3/135392589/bb40f2e9f.pdfIn PDF document text
    • https://fomoxejuj.weebly.com/uploads/1/3/4/0/134000143/jexunijexelevodij.pdfIn PDF document text
    • https://wimugedi.weebly.com/uploads/1/3/4/7/134725841/09ab59fd6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381751/normal_6003e4954ac91.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485926/normal_605d71fc7167e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406213/normal_6006cf71a5b51.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366339/normal_600e37a778d46.pdfIn PDF document text
    • https://nalovitifa.weebly.com/uploads/1/3/4/6/134600698/7556242.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466666/normal_5fd6dcb5f2c88.pdfIn PDF document text
    • http://tokio-2020.fun/wosomop93f81.pdfIn PDF document text
    • https://nemaxololele.weebly.com/uploads/1/3/5/3/135304154/d58b256704c069.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468838/normal_604cc8d5859a3.pdfIn PDF document text
    • http://best-ital.fun/fibama20zqr.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408599/normal_602d7f4009c0f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://95043331-d9de-4498-ad98-35b8ac3ee23f.filesusr.com/ugd/5740b2_24e158ebde444464995e8475a235c23e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xukanomarexumu/sulaximebinezo.pdfIn PDF document text
    • https://s3.amazonaws.com/debiwelof/harman_xxv_pellet_stove_distribution_blower.pdfIn PDF document text
    • https://62dace35-232c-43a2-b3e8-6cf19ad57148.filesusr.com/ugd/42ae31_fa705371034c4893b72880ebbe7b65a7.pdf?index=trueIn PDF document text
    • https://7b806e58-2e0f-4c22-b5e1-e0f71c4d6e86.filesusr.com/ugd/8da65f_5f76af48c1eb4898a85b979d6aa26a69.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jipowumat/anime_arcana_famiglia_sub_indo_batch.pdfIn PDF document text
    • https://s3.amazonaws.com/lopadivupudexa/cordana_felsong_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/xukirizugukugi/47058833627.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_off0001051b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1051B 5600 bytes
SHA-256: c031ed3c6927a8225b3b7debe8dccf33d4dcd4d11d11ac8d4c6f531e7462a4ca
font_01_sfnt_off0001182e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1182E 11212 bytes
SHA-256: dcd999df16d6811d89b797cf0d5a6b2e26c87f12f9ff51fd99a80cc509b1ad73

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