PDF malware analysis — malicious · bf2bcbc95ff70f27

MALICIOUS

PDF

82.2 KB Created: 2021-06-09 11:42:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25

MD5: a8092f6115f6baadf13d2042e85ed6cf SHA-1: e8eba1bcb0733f6f5dc2eaeb5867febf7ae99956 SHA-256: bf2bcbc95ff70f278cfc49469e6fbdd31a053527a73dc6520adac4aefa278f08

146 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. It uses a QR-code lure. 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 0.9996

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 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.
QR-code redirect lure medium SE_QR_LURE

Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
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://crysiq.ru/pbw?utm_term=pokemon+ultra+moon+codes PDF link annotation
- https://static.s123-cdn-static-d.com/uploads/4460045/normal_60b10f98cbb35.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4409619/normal_604d8f78765e9.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4413838/normal_6047fd1ec3d7d.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4374178/normal_5ffc14612454c.pdfIn PDF document text
- https://riwaduzubef.weebly.com/uploads/1/3/4/3/134319835/2883484.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4459777/normal_60313b579ea53.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4463010/normal_5ff4af046ae63.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4383915/normal_600b3970c10af.pdfIn PDF document text
- https://lulitetuxopibol.weebly.com/uploads/1/3/1/1/131164377/02619c2e9a321.pdfIn PDF document text
- https://panulozeti.weebly.com/uploads/1/3/5/3/135351273/8d4494.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://lijegazoz.pbworks.com/f/kigudapobaluzijojisep.pdfIn PDF document text
- http://numefen.pbworks.com/f/rapoperabimugi.pdfIn PDF document text
- http://rorazokazog.pbworks.com/f/xoledifuvuvefanelebu.pdfIn PDF document text
- http://nefusim.pbworks.com/w/file/fetch/144465189/simplifying_polynomial_expressions_worksheet.pdfIn PDF document text
- http://ditawulajobu.pbworks.com/f/how_to_use_john_the_ripper_to_crack_password_hashes.pdfIn PDF document text
- http://nafakogoxu.pbworks.com/f/2584990061.pdfIn PDF document text
- http://mefijunov.pbworks.com/f/beethoven_spring_sonata_violin_sheet_music.pdfIn PDF document text
- http://zexowisam.pbworks.com/w/file/fetch/144755922/titesakobetuvesuzebawo.pdfIn PDF document text
- http://gitefov.pbworks.com/f/is_samurai_champloo_complete.pdfIn PDF document text
- http://fomefegaf.pbworks.com/w/file/fetch/144930933/spring_boot_hello_world_application.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://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
- http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_006_off00012328.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x12328	16360 bytes
SHA-256: `f5fdc0ebc573e9f7e17842a3f01793efc19b41ba1e04f37ddb341e071193c354`
`font_00_sfnt_off0000dfb8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDFB8	3616 bytes
SHA-256: `9e1081cfaf7362c17ff4ef2483e3056c911bd0620c248790c4178adffc2d6936`
`font_01_sfnt_off0000ec88.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEC88	5152 bytes
SHA-256: `3a4fba7b673aec9cc17a19cfc93c455a889a65aad3a80e1ffd742aa20cf6136c`
`font_02_sfnt_off0000fdf5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFDF5	11000 bytes
SHA-256: `7e752c2c94c555bc9a63069af5400784eebc0cebcf656a81e0692d1dda599e1d`

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