Malicious PDF — malware analysis report

Static analysis result for SHA-256 1175edf8e17dec2a…

MALICIOUS

PDF

83.9 KB Created: 2021-06-13 00:18:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: a00582acf0dd4e1737ba03a74b90227c SHA-1: 3df0accdaadb91365c4759b84885bdecc129b839 SHA-256: 1175edf8e17dec2a9dc3a93829a2f778bf8b53ab6dff6088ec0c95252d6fbd68
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The file contains a large number of external links pointing to disposable domains, a common tactic for SEO manipulation or distributing further malicious content. The presence of numerous external links suggests the document's primary purpose is to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://mezovuduw.ru/123?utm_term=homogeneous+transition+metal+catalysis+pdf PDF link annotation
    • https://sosojisizavawov.weebly.com/uploads/1/3/1/4/131454692/4666291.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489716/normal_60349ce687545.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380083/normal_6052ffdbafc15.pdfIn PDF document text
    • https://silorofolukut.weebly.com/uploads/1/3/4/2/134265947/kufepu-luvegifejal-xigir.pdfIn PDF document text
    • https://toruruxixe.weebly.com/uploads/1/3/4/6/134698343/7072009.pdfIn PDF document text
    • https://waluxine.weebly.com/uploads/1/3/4/7/134759732/c0390.pdfIn PDF document text
    • https://balijijileg.weebly.com/uploads/1/3/4/5/134505585/belifalibir.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474759/normal_5fd6d060159d6.pdfIn PDF document text
    • https://wufikasokuwomoz.weebly.com/uploads/1/3/4/3/134359410/29f46.pdfIn PDF document text
    • https://josozigigararu.weebly.com/uploads/1/3/2/6/132681886/tudolom.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449605/normal_5feb3629d5076.pdfIn PDF document text
    • https://jumugegapu.weebly.com/uploads/1/3/0/8/130814907/vazopusegajofo-nezafaku-vivelodejodug.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382976/normal_60be963407a2c.pdfIn PDF document text
    • https://xipadumomide.weebly.com/uploads/1/3/7/5/137500857/0d8bf44f0f2ee9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378157/normal_5fc57dc9c531e.pdfIn PDF document text
    • https://pelifofenap.weebly.com/uploads/1/3/3/9/133997555/kubowegowag.pdfIn PDF document text
    • https://fanivimijebi.weebly.com/uploads/1/3/4/5/134594820/7946848.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/e49ae89b-1432-4909-957b-bc1f79df284d/how_to_reset_q-see_dvr_password.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7bd14aab-6056-47b3-8945-7542f6388f8d/nuwupeluzerid.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
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e59e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE59E 5420 bytes
SHA-256: 9bea645590b684464edea325c120b27901cfce18e771b4df4a6ea4c5a033741e
font_01_sfnt_off0000f7fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7FB 10860 bytes
SHA-256: 436bb9192ecaaa85201ecae840425155f23bcce96a407a91190b59eb8cdbd42a
font_02_sfnt_off00011ce5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CE5 16204 bytes
SHA-256: 541fa2b6826b0add99b7d5a173ef1e6a5567607b5192f75b810eb17d6a563501
font_03_sfnt_off00013213.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13213 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361