Malicious PDF — malware analysis report

Static analysis result for SHA-256 a22e7ac4a616eb0e…

MALICIOUS

PDF

96.1 KB Created: 2021-03-17 14:55:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b40abb6449596a17f705ed14c03e326f SHA-1: d8e32bfd35c97b1f7d15d0fae255d4786a8b80f0 SHA-256: a22e7ac4a616eb0e849276675342934b9494eb6276e4dba142bdd5c5b0db7ffd
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to potentially malicious domains, as indicated by the 'PDF_SEO_LINK_FARM' and 'PDF_URI' heuristics. The ML classifier and ClamAV also flagged this PDF as malicious, specifically as a phishing trojan. The embedded URLs suggest an attempt to redirect users to malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://resalured.ru/wix?keyword=dofus+sacrier+leveling+guide
    • https://patewolenapew.weebly.com/uploads/1/3/4/5/134525441/mubeleluget.pdf
    • https://static.s123-cdn-static.com/uploads/4409114/normal_5fcbbcb67844b.pdf
    • https://cdn-cms.f-static.net/uploads/4451220/normal_5fd750ab4e920.pdf
    • https://static.s123-cdn-static.com/uploads/4414486/normal_5ff47a9bd3565.pdf
    • https://zutiwijutorezaz.weebly.com/uploads/1/3/4/3/134354078/86174e9.pdf
    • https://static.s123-cdn-static.com/uploads/4500893/normal_5fc6b09ef34fd.pdf
    • https://renezotutumiw.weebly.com/uploads/1/3/5/3/135343322/2f0c1c66ff.pdf
    • https://cdn-cms.f-static.net/uploads/4405197/normal_6045f38399c4c.pdf
    • https://cdn-cms.f-static.net/uploads/4407303/normal_603ea7084a809.pdf
    • https://static.s123-cdn-static.com/uploads/4386079/normal_5fc8741eb8af0.pdf
    • https://static.s123-cdn-static.com/uploads/4393893/normal_5fca6ad984e4d.pdf
    • https://cdn-cms.f-static.net/uploads/4413011/normal_601f158cb96f9.pdf
    • http://podifodosej.scienceontheweb.net/12347310671.pdf
    • https://static.s123-cdn-static.com/uploads/4421209/normal_5ffe6056e3470.pdf
    • http://sizegoduxuxa.mygamesonline.org/marketing_research_ebook.pdf
    • https://cdn-cms.f-static.net/uploads/4372378/normal_603aa10131d21.pdf
    • https://cdn-cms.f-static.net/uploads/4494877/normal_6019698ba56b0.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://54957a25-093b-4cbd-a4f0-8eb5fea931f0.filesusr.com/ugd/8ba634_04e290e83d044e6ba5c3aba7949c23d3.pdf?index=true
    • https://711a90e7-97f2-4eab-8690-3003ec1e9b64.filesusr.com/ugd/a0905b_dfc2881878ff4e20a8c140cae8b929e9.pdf?index=true
    • http://guwaxilajoxeza.onlinewebshop.net/43091367667.pdf
    • https://77bac38d-831a-46d6-8f22-d7743fcadc58.filesusr.com/ugd/5b9a87_297560d9aa3649e988d27b1af3a54cf2.pdf?index=true
    • https://937a8a2d-b41a-4163-aff8-eda6db263557.filesusr.com/ugd/21e6f2_f6d175a67dc343ab80d8e12665082222.pdf?index=true
    • http://gajamozaxekega.atwebpages.com/93111131163.pdf
    • https://28932ed2-21d9-4123-99cb-fcff0aac4472.filesusr.com/ugd/cc089a_33ce29fb19ba43c0827fbdec1dc56feb.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_off000138c9.bin
c735581c1c76ef3da6cc685d18f83c5d2b48df3a241428c148a61aa174da9fb0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x138C9 5248 bytes
font_01_sfnt_off00014ac4.bin
01a3b78fdcaa6744b1d297063ebf70d5f04c3a19de6234417571f3e9f5f4dff9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14AC4 12028 bytes

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