PDF malware analysis — malicious · 78caf8def27998f3

MALICIOUS

PDF

81.9 KB Created: 2021-03-06 05:12:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23

MD5: e5d49ef22d4a08023338f9e838cc6a46 SHA-1: 91541ba616e2910f7c678ba77b72407ac41faeeb SHA-256: 78caf8def27998f370327d4cb7a6a5a74e471aac70a74e41376f4271c33e769e

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9992

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
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://nipisod.ru/wix?keyword=cascade+high+school+leavenworth PDF link annotation
- http://maska-respirator.com/sojimixcuftk.pdfIn PDF document text
- http://bathforlegs.xyz/moketodrqwse.pdfIn PDF document text
- https://dukinuvofipul.weebly.com/uploads/1/3/2/7/132711936/2d9ce7.pdfIn PDF document text
- http://poverkavoda.website/negixonnhsof.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4456999/normal_60117fc869313.pdfIn PDF document text
- http://cg-designer.xyz/photo_gallery_and_screensavermnd2p.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4373526/normal_601e06598f23a.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4472766/normal_5fe49fe767495.pdfIn PDF document text
- http://redita.fun/capital_funds_investments5zm0h.pdfIn PDF document text
- https://riwusivi.weebly.com/uploads/1/3/4/9/134900433/5937652.pdfIn PDF document text
- https://vilamewu.weebly.com/uploads/1/3/0/7/130775649/9c4d4139.pdfIn PDF document text
- http://skidki-day.store/kiss_the_rain_sheet_music_freepdcxm.pdfIn PDF document text
- http://hd-cam-mirror-up1.club/71914575164u3760.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4462730/normal_5fe78b683cda9.pdfIn PDF document text
- https://foralesu.weebly.com/uploads/1/3/4/0/134096101/vajexuxepiwozin_fefedaviv.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4445889/normal_60385e5e58aa6.pdfIn 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/82ed1428-5783-4a9c-a64b-17afb556035a/kabofezodisox.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/1f2b4049-ad07-4131-a8cd-4e208762625e/42097597637.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/1f8bfbef-c617-428b-973a-7ec2479951e8/19858426512.pdfIn PDF document text
- https://s3.amazonaws.com/bulozor/77194250418.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/cd63ea15-dca2-40bb-9a57-6becf50b9896/what_does_77777_mean_spiritually.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/f04a312f-e6c2-4811-8bc0-e9cbd8c29a55/13466360262.pdfIn PDF document text
- https://s3.amazonaws.com/gotitibekovi/sajuberuweso.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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000ef26.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEF26	5256 bytes
SHA-256: `802aca03941ff90daa27829f7603eaaa649e0b168efc6fb54f50391c64597f66`
`font_01_sfnt_off0001010f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1010F	10224 bytes
SHA-256: `0cb86e928f69f3541a603b873a1f1d1f05beb27bd765ce2691ae8518616d9ba2`
`font_02_sfnt_off0001242f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1242F	16344 bytes
SHA-256: `7e0863d6dcdfe3ce59f67395a06e5e8634226e44f713773c85e494ff6d119ee1`

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