PDF malware analysis — malicious · 4a2cf45400ab45f1

MALICIOUS

PDF

92.7 KB Created: 2021-03-21 03:34:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18

MD5: 2693c74c4a2e9d41e196bcc4f6b9cd0a SHA-1: 908c805c63604eeeac49265701e2df88ad6d58bf SHA-256: 4a2cf45400ab45f17fdf783dc43708c02ca755874cc03824a30f0554ad4308d8

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment 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 0.8453

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 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
PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED

The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
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://seumenha.ru/award?keyword=system+analysis+and+design+full+notes+pdf PDF link annotation
- https://cdn-cms.f-static.net/uploads/4493579/normal_603b1bd69ac3d.pdfIn PDF document text
- https://femixazate.weebly.com/uploads/1/3/4/3/134363246/90009.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4366398/normal_600f905243536.pdfIn PDF document text
- https://wokopapun.weebly.com/uploads/1/3/5/3/135388848/sixevumatenede.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4427828/normal_603a166855e07.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4484633/normal_600390f7d185e.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4367632/normal_5fc5af2b0d8a5.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4464302/normal_600bf70b62305.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4387412/normal_5fffdc459d3bd.pdfIn PDF document text
- https://xidelesa.weebly.com/uploads/1/3/4/4/134498911/xifamobepuwu-debeneja-letobatoveter-golasalito.pdfIn PDF document text
- https://zabavorurexezab.weebly.com/uploads/1/3/5/3/135314693/132b6068786c0f2.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4485434/normal_5fd8b60d6874c.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4412768/normal_5fcd6fb98bfe6.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4420939/normal_5feaff965ca77.pdfIn PDF document text
- https://tizukusijevawus.weebly.com/uploads/1/3/4/4/134454617/sorifuwiz_mitejuvasi_pojodo_nefevazekanan.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4443598/normal_5fcc963242169.pdfIn PDF document text
- http://fontawesome.iohttp://fontawesome.io/license/In PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://uploads.strikinglycdn.com/files/5c142fb3-0f09-4e40-b9d0-a3d1b812156a/neripebabonajiwodo.pdfIn PDF document text
- https://s3.amazonaws.com/gavapozalilup/notify_all_android.pdfIn PDF document text
- https://s3.amazonaws.com/kakekojezutok/mivaxofifirepoz.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/626d4b90-41f4-4137-8449-3cd9a49557a1/weber_e310_vs_e315.pdfIn PDF document text
- https://s3.amazonaws.com/zepifudoxapo/vebuderezuju.pdfIn PDF document text
- https://s3.amazonaws.com/nuselufuzo/maverick_redi_chek_et-732_replacement_probe.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/a686cf12-8dcd-413a-bd76-31d2284c8298/dunkin_donuts_wake_up_wrap_sausage_calories.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/aab09a33-14b2-4d06-823c-6b6fe0496254/xirobalabutipip.pdfIn PDF document text
- https://s3.amazonaws.com/fodose/60513133250.pdfIn PDF document text
- http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00012eb9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12EB9	1872 bytes
SHA-256: `cf373f8eb364677dc8d29ae0cbe658a1b8665e9067f0cd69b3a2e84d4b370a53`
`font_01_sfnt_off000137ad.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x137AD	5468 bytes
SHA-256: `ae80158177221ee8cfcd5aa82d94e80d5af61702c69f5ac65342c836bb95f2e5`
`font_02_sfnt_off00014a44.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x14A44	11576 bytes
SHA-256: `e355de3ab3887749157a14fb4c539c2fd1d0fa1147e23eafda4a6f0932a0ef86`

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