Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8ec6c6e56289409…

MALICIOUS

PDF

77.0 KB Created: 2021-04-03 05:04:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 282a7f57d3ecd36b8498eaa15e67cfb3 SHA-1: bc26a4b967a11a246ca8d0cc32cea36e4e05c162 SHA-256: e8ec6c6e562894095da8f5c97b22ae4afc3d48527f753a6f2b02253e740f968d
156 Risk Score

Malware Insights

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

The PDF document contains numerous external links, with one prominent URL pointing to a suspicious domain, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, appears to be a lure related to movie discussion questions, designed to trick users into visiting the linked malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • 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
  • 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://ponafet.ru/123?utm_term=fed+up+movie+discussion+questions+answer+key
    • https://gojanaribebiw.weebly.com/uploads/1/3/1/4/131437307/fodoboxirok_laradedit_pufamu.pdf
    • https://bijoxopibomer.weebly.com/uploads/1/3/4/3/134325560/wazakug.pdf
    • http://idealslimitaly-ufficiale.site/73467258117jafj3.pdf
    • https://static.s123-cdn-static.com/uploads/4365570/normal_5ffbc1f728c03.pdf
    • https://nalelijuw.weebly.com/uploads/1/3/4/5/134512153/gebesawuranefup.pdf
    • https://cdn-cms.f-static.net/uploads/4366665/normal_6016b34d64403.pdf
    • https://cdn-cms.f-static.net/uploads/4401555/normal_6020fd67d3e64.pdf
    • https://lubigovoxudi.weebly.com/uploads/1/3/4/1/134109264/58bb741.pdf
    • https://cdn-cms.f-static.net/uploads/4379731/normal_605930edba953.pdf
    • https://cdn-cms.f-static.net/uploads/4417653/normal_5fd3c9a7da626.pdf
    • http://nonly.xyz/gewonorovofegabuwekaxovpw7oi.pdf
    • http://barashik.space/cat_cj3000_jump_starter_reviewsbdswx.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/5af62458-0342-4a02-84bd-8c5820b8a072/plotting_data_on_log-log_graph_paper.pdf
    • https://f38be386-5799-403b-9303-fb121113655a.filesusr.com/ugd/6f1aa7_a164507cc76b4b54b5938f3fe53916cf.pdf?index=true
    • https://77ac2d45-d533-4b4b-a85c-01e81860bff9.filesusr.com/ugd/7f1ad7_ad527b742ef64473ba3427dce11680dd.pdf?index=true
    • https://uploads.strikinglycdn.com/files/4906e2c6-9c25-4bb8-bf74-26250da90c8d/how_does_osmosis_jones_behave_that_is_uncharacteristic_for_a_white_blood_cell.pdf
    • https://uploads.strikinglycdn.com/files/139e9f58-5f06-43ea-bcf1-9dcf1607ed4f/biochemistry_textbook_online.pdf
    • https://uploads.strikinglycdn.com/files/4d2b4067-0fd7-4ece-bc78-02bde618a801/mufupasuzusipamib.pdf
    • https://4f0f5a39-0a2f-4cdf-b4e4-40a644fad8b9.filesusr.com/ugd/2024fe_2b77fe66b785466eaee58570e2bcc64c.pdf?index=true
    • https://1bf92926-22d0-44a1-94fb-b51843c41cd5.filesusr.com/ugd/762c1a_8955af6fa82348b7a7cdc58bbec0f943.pdf?index=true
    • https://uploads.strikinglycdn.com/files/68113e71-9e58-4e70-8825-38d20da3572e/2528295826.pdf
    • https://238a82c5-85a8-4641-a991-2f0f5270ddc4.filesusr.com/ugd/63f22d_785f613571ed436799baf37fc8bb1cf4.pdf?index=true
    • https://d62ff7d9-aefc-4ab8-8cdf-af38868aea16.filesusr.com/ugd/54b9a1_4d1238b4a5e248f59cb5069b848aa192.pdf?index=true
    • https://d6504552-49b0-4b7d-b1ff-94f9e1082b83.filesusr.com/ugd/1f0558_18129a86fe93499fa259993d08b482af.pdf?index=true
    • https://ad16408e-fbd2-4c0d-b170-1fa3f72263cb.filesusr.com/ugd/bcd086_e7f9becf224c435bbf5807d2c82aa233.pdf?index=true
    • 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000edcb.bin
9edcbee96597c5da41cc6d884dfb36d6d040c246d80d84f6546bf02d091721ca		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEDCB 5588 bytes
font_01_sfnt_off000100d3.bin
a9409f4c7444db158ab113722385c5a80a9bb2e7c5fcbce23aaf9e740d26082f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x100D3 10980 bytes

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