PDF malware analysis — malicious · 2dc3f1e14b6eac93

MALICIOUS

PDF

72.1 KB Created: 2021-06-06 14:42:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23

MD5: bf2c7301a6fff7bfd0ad6d69c236f338 SHA-1: 7e6ec03b38b7d60a7c246b52e183808c6045eafb SHA-256: 2dc3f1e14b6eac9312da25f0a6222f74611dd4cd1f7146782e41f29d7088520f

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 0.9907

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://synerhu.ru/pbw?utm_term=non-binding+indication+of+interest+template PDF link annotation
- https://static.s123-cdn-static.com/uploads/4467586/normal_5ffa6e7c086c1.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4496582/normal_603f91a3c7f5f.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4375703/normal_604b1f9c391e9.pdfIn PDF document text
- https://vaxudiku.weebly.com/uploads/1/3/4/7/134709892/407f2f48402b.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4390999/normal_5feb5ed934c9f.pdfIn PDF document text
- https://susawodaf.weebly.com/uploads/1/3/2/8/132814942/vapumuwu-tunemewofev-nuzuki-bomikuxo.pdfIn PDF document text
- https://pusikeruwupij.weebly.com/uploads/1/3/4/5/134518778/rijexuxan.pdfIn PDF document text
- https://japujavawewiri.weebly.com/uploads/1/3/2/6/132696154/4466458.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/2391a535-f321-456f-88d1-5515000e558a/nisixamu.pdfIn PDF document text
- http://junerew.pbworks.com/f/how_to_read_washburn_guitar_serial_numbers.pdfIn PDF document text
- http://wefolevemud.pbworks.com/f/1694146583.pdfIn PDF document text
- http://zowonixepor.pbworks.com/f/how_to_install_patch_pes_2020_mobile.pdfIn PDF document text
- http://nimogomaw.pbworks.com/f/47739845885.pdfIn PDF document text
- http://zezupagijene.pbworks.com/w/file/fetch/144602655/7271302832.pdfIn PDF document text
- http://natutaliva.pbworks.com/f/65911544763.pdfIn PDF document text
- http://bevojoluvu.pbworks.com/w/file/fetch/144464028/how_much_does_it_cost_to_renew_car_registration_in_abu_dhabi.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/a9886f16-2c66-4011-b4c5-dc3819b8d85e/are_the_fantastic_beast_movies_prequels_to_harry_potter.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/751f2a38-f32f-439b-b5bb-9d38d8c90fb4/30068056391.pdfIn PDF document text
- http://jajisaparev.pbworks.com/w/file/fetch/144611763/bukitaxetolororesewe.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_off0000d829.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD829	5404 bytes
SHA-256: `3a3c5aa24998111c5258091b46ca2e05ac87d27ae2481ce6b9ef78c660bacd71`
`font_01_sfnt_off0000ea74.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEA74	10568 bytes
SHA-256: `a83bc87252f15b179283df4290909776904a3ffd243f2776fdcc460992676075`
`font_02_sfnt_off00010eb5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10EB5	4324 bytes
SHA-256: `ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3`

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