Malicious PDF — malware analysis report

Static analysis result for SHA-256 9bffde3690294aaf…

MALICIOUS

PDF

64.0 KB Created: 2021-04-20 18:40:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: e45ae70126dd700432e179c5ee4acefc SHA-1: 0488914d2f8605537268be1adab2567c8b3ab42a SHA-256: 9bffde3690294aafd428a78e1c953f2223a4c4ad771e55d81fe87253df98e6c0
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9565

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.
  • 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
  • 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://kuzutuzo.ru/strik?utm_term=online+jpg+to+text+converter PDF link annotation
    • https://cdn.sqhk.co/gubujurit/igihhg0/ncert_solutions_class_7th_science_chapter_17.pdfIn PDF document text
    • https://musisemikalig.weebly.com/uploads/1/3/4/6/134694348/790bc4603d.pdfIn PDF document text
    • https://cdn.sqhk.co/bitizulokiva/EjaIIor/vadiwusizoxubimuja.pdfIn PDF document text
    • https://cdn.sqhk.co/gegefemorosu/flLEjbm/xekukakaluranigorutitoz.pdfIn PDF document text
    • https://zuwojutiraz.weebly.com/uploads/1/3/4/7/134729165/1285205.pdfIn PDF document text
    • https://joziwofu.weebly.com/uploads/1/3/4/0/134012586/9603823.pdfIn PDF document text
    • http://wojesukuzak.mygamesonline.org/27762018643.pdfIn PDF document text
    • http://peromopativej.mypressonline.com/salvation_army_christmas_assistance_frederick_md.pdfIn PDF document text
    • https://lubozukutiximik.weebly.com/uploads/1/3/4/4/134472848/pamenuro-wedikoresevore-sagizatof.pdfIn PDF document text
    • http://lenulari.mypressonline.com/jezuwuburagejenusutas.pdfIn PDF document text
    • https://taxajoberaruvu.weebly.com/uploads/1/3/4/3/134320235/e322aa.pdfIn PDF document text
    • https://cdn.sqhk.co/lonuxonemor/bIFsqja/gutifokamije.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://c4647614-9ff8-4b00-b819-08dc938bd166.filesusr.com/ugd/5d3f24_578cd98167214a01a2fcd34033a3f9d5.pdf?index=trueIn PDF document text
    • https://cd489911-dc6d-4439-b408-84622343fb93.filesusr.com/ugd/d8e941_44f22f95d6ec42eea9d94607f05def23.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/banula/34448927876.pdfIn PDF document text
    • https://s3.amazonaws.com/vefagotoje/fallout_4_goty_dlc_not_installed_ps4.pdfIn PDF document text
    • https://cf336f9a-6a79-4542-9269-5b62d6eb69dd.filesusr.com/ugd/1daf83_8638b73d4eb941e089a8955c48dd4b0d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/devuxuzejozam/remdio_caseiro_para_cseos_amigdalianos_gratis.pdfIn PDF document text
    • https://s3.amazonaws.com/lakadutof/how_much_does_verizon_jetpack_cost_a_month.pdfIn PDF document text
    • https://a49ec80b-b4e3-4dac-84ed-d687b6aff6a5.filesusr.com/ugd/46d696_ded652abd63f4b67b5b72d456ed1a11e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rutufokedizon/95969114660.pdfIn PDF document text
    • https://926da24b-d3df-4aea-ac1b-ebdf7359a9e7.filesusr.com/ugd/fef925_2dea0f39cd654e04a33462d4d1a65fc6.pdf?index=trueIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED91 4944 bytes
SHA-256: 46b42a21a52ff0889bca2045e10d53f2567eca07392586c0b27bfd8615df6ba4

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