Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ed078383eb2a42c…

MALICIOUS

PDF

87.3 KB Created: 2021-03-20 11:03:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cf080f43a95c573ad407728abb4bfa8e SHA-1: 29eef8741c677bc080294ec8db48e9c55e2df1f0 SHA-256: 2ed078383eb2a42cca34d8c52577ab62d7d49ca3f736b7da91017f96c959cde5
156 Risk Score

Malware Insights

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

The PDF file contains a significant number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or redirection scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were directly extracted, the presence of numerous external URLs points towards an attempt to redirect the user to potentially malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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://dafemum.ru/123?utm_term=bam+bam+bhole+dj+mix
    • https://vodesaladamaju.weebly.com/uploads/1/3/5/2/135298616/nilep.pdf
    • https://static.s123-cdn-static.com/uploads/4408004/normal_5fc5f5f54ebfe.pdf
    • https://cdn-cms.f-static.net/uploads/4380700/normal_604e4bbee3331.pdf
    • https://cdn-cms.f-static.net/uploads/4404500/normal_6035dd6874cc0.pdf
    • https://cdn-cms.f-static.net/uploads/4378855/normal_603114929eeeb.pdf
    • https://mivatuvogap.weebly.com/uploads/1/3/4/0/134040868/fffb7.pdf
    • https://static.s123-cdn-static.com/uploads/4469834/normal_5ff0a55cabcac.pdf
    • https://cdn-cms.f-static.net/uploads/4453900/normal_602c56864e619.pdf
    • http://worldhold.online/442771002103ltea.pdf
    • https://cdn-cms.f-static.net/uploads/4366331/normal_6050f01f64e70.pdf
    • http://aycotoro6.xyz/black_s_law_dictionary_freef2yp6.pdf
    • https://cdn-cms.f-static.net/uploads/4393026/normal_602703a5201e9.pdf
    • https://static.s123-cdn-static.com/uploads/4402503/normal_5fcf2d871b722.pdf
    • http://kuxogajow.iblogger.org/how_to_deal_with_visual_hallucinations.pdf
    • https://cdn-cms.f-static.net/uploads/4385021/normal_603d618390052.pdf
    • https://ravuripuzi.weebly.com/uploads/1/3/5/9/135958818/getenekov.pdf
    • http://naturaleone.space/270943176098pcdi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://zovebosovu.rf.gd/mukobupebowidezura.pdf
    • http://nukamepewavux.epizy.com/juvedusubutukusemagorubox.pdf
    • https://77da94c0-0f0a-445b-87af-e489a0b5ef66.filesusr.com/ugd/db1da1_07ef6e1964764c93882f918ca61bd34f.pdf?index=true
    • http://zetomuroki.epizy.com/bug_bounty_hunting_methodology_v3.pdf
    • https://203aa715-7352-46b1-b16b-5d0aeeaa27a2.filesusr.com/ugd/0582e0_80e07eb8197f4072b66e1e91b1b25c79.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea8a.bin
d774ea35627c636b60b67efcb19233550797bc3630d6d7476e68a1591658f61e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEA8A 2988 bytes
font_01_sfnt_off0000f53a.bin
8a1a003d0f62b77a7fa789bece35c430753c6a681d6947270e9bcc50ffdff936		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF53A 5124 bytes
font_02_sfnt_off0001067e.bin
02956db23ba67d56ae0058315872b6fa10a9f8383e99ad16077b3e84f7ad197d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1067E 5412 bytes
font_03_sfnt_off00011621.bin
ed406f1dfc46207256fed97fec8381d656faa547abe19e5a9760eaf1b253c046		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11621 10272 bytes
font_04_sfnt_off0001399b.bin
faaff097beca0d83227358cdd68cefd12361f6f663374ff2d07a83a239a7de5d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1399B 16104 bytes

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