Malicious PDF — malware analysis report

Static analysis result for SHA-256 70e30d6c3915330d…

MALICIOUS

PDF

78.1 KB Created: 2021-03-12 11:26:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 70ebc39901718b0a37a4e58020c26864 SHA-1: b358b460f8b5fbfd940e40ecc90c65f1fde2cbc0 SHA-256: 70e30d6c3915330de0fc5b11782f13af32e5ab2de2da2e5af43e434da411ea15
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to link farms, suggesting a phishing or SEO spam campaign. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and extensive external linking are indicative of malicious activity, potentially leveraging embedded JavaScript for redirection or further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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/award?keyword=dependent+and+independent+voltage+and+current+sources+pdf
    • https://zotagozugub.weebly.com/uploads/1/3/0/7/130739891/vofosiwetetu.pdf
    • https://cdn-cms.f-static.net/uploads/4462056/normal_5fd115f8afc7a.pdf
    • https://cdn-cms.f-static.net/uploads/4388063/normal_5fdc442977e59.pdf
    • http://betijeduw.getenjoyment.net/python_projects_for_practice_github.pdf
    • https://radigaligoled.weebly.com/uploads/1/3/4/3/134333621/rarepepatumoluvi.pdf
    • https://nobiramiw.weebly.com/uploads/1/3/4/4/134403563/jazoxeniraziri_tujopumivux_jesipogap_jitidusut.pdf
    • https://cdn-cms.f-static.net/uploads/4378425/normal_60109317bda88.pdf
    • http://winoxolupuvil.getenjoyment.net/zoom_5350_firmware_update.pdf
    • https://cdn-cms.f-static.net/uploads/4477913/normal_5fd2467037e5c.pdf
    • https://static.s123-cdn-static.com/uploads/4465705/normal_5fce017d65b5a.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://7fc1e5b2-1dd8-4457-9de2-3dea1ab9f589.filesusr.com/ugd/fedd61_984b86a7e11c40769f3193493dc98a51.pdf?index=true
    • https://8d5bcf17-53f2-4f21-b585-7a27aef14131.filesusr.com/ugd/7baf93_754b3f5e879b4232989aa70f5aa8a416.pdf?index=true
    • http://jizuwugi.rf.gd/fipemawi.pdf
    • https://460eb545-5389-4aa9-9e78-d1074a8bca0c.filesusr.com/ugd/21a131_1162cc9b2796479788526ac700090b37.pdf?index=true
    • http://wobemiko.epizy.com/87525766929.pdf
    • https://b01ec662-dec5-4f54-b977-8708717d6054.filesusr.com/ugd/07e02c_d705fcfa32bd41749fd931be2d621766.pdf?index=true
    • https://e5baaea7-7007-41de-9367-4ebf3ed55875.filesusr.com/ugd/8e1900_9c9a47cda31a436fbf10aabf00962909.pdf?index=true
    • https://b3a1a1c9-4f8f-4fb8-b7cc-7339030cc889.filesusr.com/ugd/162fe6_47a16c5a369d46a6bb728b118ec59865.pdf?index=true
    • http://jasosuwer.epizy.com/kavavunerev.pdf
    • https://233b4d2f-9c44-4004-b776-098ebc281e6f.filesusr.com/ugd/7f980c_e1566a2b851f400395a40fe728f59011.pdf?index=true
    • https://ffb80149-315c-4936-8637-e87477b606fc.filesusr.com/ugd/e7410d_04c596f2c2bb45ad94dc5b69d3ed9b1a.pdf?index=true
    • https://c96d0889-97fb-4213-90a4-a08ae01970e6.filesusr.com/ugd/ed32f2_969338a6ccc94dc1a1091dea860abb8a.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_off0000f235.bin
c7f0d383fd55caf2cd8d3dd8126d6f2f7611d32bd9ccd7cb5fdd513ad7a99483		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF235 5384 bytes
font_01_sfnt_off000104a5.bin
203e32c9a1fe993645bf8ab34ade4920cf9db1fb761e76fbd824885fd814af28		 pdf-font-stream PDF embedded font (sfnt) at offset 0x104A5 11080 bytes

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