PDF malware analysis — malicious · 9668d40da044caea

MALICIOUS

PDF

83.9 KB Created: 2021-05-27 01:47:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25

MD5: 7d97f59eb378b497f3d5ae3a502b3468 SHA-1: 1769ccb1cc013fcb44a7dc3b0f24c7b68a9cc8d4 SHA-256: 9668d40da044caeafa7eb761c2de8d343e07e1a8dcda350e0251d0c2f0616a7f

164 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 and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

Nyx PDF Classifier malicious score 0.9995

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.
Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON

Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
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://resalured.ru/strik?utm_term=classification+of+matter+worksheet+answers+pogil PDF link annotation
- https://girowefado.weebly.com/uploads/1/3/5/3/135349553/c5fed21c751b4a.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4370284/normal_5fd9b4756310d.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4413456/normal_60152758344be.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4379982/normal_5febe8900303b.pdfIn PDF document text
- https://jitoxazenop.weebly.com/uploads/1/3/4/5/134588357/e91cd4d7c2999d.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4454545/normal_600b7c8c1d2fc.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4416787/normal_6035c0a011394.pdfIn PDF document text
- https://lenoloxib.weebly.com/uploads/1/3/4/0/134040664/misibovida-vinuwevaduser.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4445321/normal_6009c28f6aeef.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4485012/normal_6012519328d52.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4487194/normal_6034d7d1c6d55.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4447265/normal_602162dce4ec5.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4383795/normal_60442fb04b784.pdfIn PDF document text
- https://tonuvufew.weebly.com/uploads/1/3/1/4/131438708/zunulad.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4388827/normal_605f394ec18be.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/4546e058-fe3d-43ac-b88c-05826c6822bf/hp_designjet_500_24-inch_wide_format_printer_plotter.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/471c5ee2-4e97-44e1-acfc-b29724962eed/wufaxolomop.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/0895dbea-2c4f-4367-b83a-59f8419629c6/fundamentals_of_communication_systems.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/a7f956dd-8870-42bf-b5de-df8860d6e0b3/college_algebra_julie_miller_2nd_edition_free.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/2d900019-5934-4798-ba1a-bcffa9392b8e/football_newspaper_report_ks2.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/4aef3bd4-1b0f-452f-88ff-076898b90375/kagarafufowegesuwajip.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/feb8d1be-03d7-4ee1-bb8b-a40dc1d5437c/dizaxafededuvukid.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_off0000f0ab.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF0AB	5488 bytes
SHA-256: `c53a8ed70c95c265819eacabaaf65dabab5e052b77ed582dc55c11fadd3c0e85`
`font_01_sfnt_off00010341.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10341	11252 bytes
SHA-256: `8f11f94273f6d95cbb338e74f17f52308ff4119d1a96b161f5a60fbc3e7b88dd`
`font_02_sfnt_off000129f9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x129F9	16312 bytes
SHA-256: `028dbaa76d48ae99b02248bacea50134e27ed131f5dd39e25ac401de8961e19b`

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