Malicious PDF — malware analysis report

Static analysis result for SHA-256 3baf3efc6e1f3497…

MALICIOUS

PDF

124.7 KB Created: 2021-05-31 13:44:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 0c470e716d11d13a3ab85c07ec4040fb SHA-1: 250275bbf40fce9242002b19c2a7ab169ffa4da4 SHA-256: 3baf3efc6e1f34972230a2f1f6c1ea9a246f75ebb6fcb5d0334e82fe9b90faeb
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a common tactic for SEO spam or phishing campaigns. The heuristic PDF_SEO_LINK_FARM indicates a large number of outbound links, and one specific URL, 'https://lozipotod.ru/strik?utm_term=how+to+download+geometry+dash+free+ios+2020', suggests a lure related to game downloads. ClamAV detection and ML classification further support its malicious nature, likely as a phishing or trojan distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9665

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://lozipotod.ru/strik?utm_term=how+to+download+geometry+dash+free+ios+2020 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4376357/normal_5fcefaddaf84a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469863/normal_6036a51cf423c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417656/normal_601ddb6cddde1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500446/normal_6056ec3c55b16.pdfIn PDF document text
    • https://jakemujilofadam.weebly.com/uploads/1/3/1/3/131380171/zudujem.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476946/normal_5ff2a07e6947c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481841/normal_6004fba75aacf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393346/normal_5ff485d2c51ab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406789/normal_602669e8bee74.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366033/normal_5fd6d3910c4a3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370077/normal_6006e03f4826c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410020/normal_6013cbe3c913a.pdfIn PDF document text
    • https://gogesatita.weebly.com/uploads/1/3/4/3/134321397/5040726.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444884/normal_6031163e61695.pdfIn PDF document text
    • https://wapaberupuz.weebly.com/uploads/1/3/5/3/135397773/4846945.pdfIn PDF document text
    • https://zijovegumasapal.weebly.com/uploads/1/3/4/3/134307166/mitojavuriwema.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408174/normal_602a7c5119509.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479214/normal_604952b63a2d1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404529/normal_5fe83f019e43d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4497093/normal_6003586e61f84.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409628/normal_60011e0697605.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493550/normal_606aef8d1dc9f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491934/normal_5feb2bedd7cfc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://scripts.sil.orgThisIn PDF document text
    • https://uploads.strikinglycdn.com/files/270707a9-8e33-43d1-8922-f595843314fc/ranixakidulolurevok.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/595b06a0-569e-4786-8045-651e0ae97be2/how_to_activate_a_new_xfinity_cable_box.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4403c5cc-1cae-442f-b16c-71b724a45fa8/17358279331.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://scripts.sil.org/In PDF document text
    • http://scripts.sil.org/OFLAbyssinicaIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 7

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001311b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1311B 6796 bytes
SHA-256: c3c5a800f93ab88c866ce25aab85ca89f1cf4c197319f1b1588a3607d9104955
font_01_sfnt_off000141ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x141FF 5444 bytes
SHA-256: 7f753dad238b5bdecd3ed3d12ff5292703b8c1305b6aa1e43f55e0f6b1ca2fd6
font_02_sfnt_off000154ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x154AE 5748 bytes
SHA-256: 9d99770f07f27ad69ba7eda229e85431e0ced3ae8a87c147579bca120e86983d
font_03_sfnt_off0001682c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1682C 20952 bytes
SHA-256: 31c9189b02643b1f86ee8b2c8996e4152ed68ef9d17a74cae5a23ab93c0df31b
font_04_sfnt_off0001884f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1884F 16408 bytes
SHA-256: 9ba2849952d70e7cdeaff856952f512f1636be1bc47431add042e01bd014477f
font_05_sfnt_off0001bbf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BBF3 16788 bytes
SHA-256: a55e027b13f0f3b4cf7af809caf0a50b94f144016fc3bf89bc923e9c716fc752
font_06_sfnt_off0001d3c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D3C9 6108 bytes
SHA-256: 31cb5846bafd0ba01ee536c1fbbda6556ecf6149762088ada0284b513d19daf6

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