PDF malware analysis — malicious · c68ff82428b76b90

MALICIOUS

PDF

78.4 KB Created: 2021-01-20 10:40:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: ad7671da34fa40a467f2a4682b14e7de SHA-1: 0bf38d7194b9d416bfe113b70253d8c53f379c67 SHA-256: c68ff82428b76b903d9ce98af1d9d550b267c3a695ce5c69336119d9410b0909

214 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector URL. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of embedded links suggests an attempt to redirect the user to malicious infrastructure, likely for phishing or malware distribution.

Machine Learning

Nyx PDF Classifier malicious score 0.9998

Heuristics 5

PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK

PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
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.
ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
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://yafferge.ru/123?utm_term=final+fantasy+xiv+limsa+lominsa+inn
- https://sudiduku.weebly.com/uploads/1/3/1/4/131452825/wudekokama-vusaxelapubugap-rameb-ninipuwo.pdf
- https://static.s123-cdn-static.com/uploads/4451945/normal_5fff46a329e12.pdf
- https://fosogizubosa.weebly.com/uploads/1/3/1/6/131637108/b6dfea06c9e4.pdf
- https://cdn-cms.f-static.net/uploads/4450251/normal_5fdb6f39b7e1c.pdf
- https://site-1176575.mozfiles.com/files/1176575/uniform_accelerated_motion_worksheet_2__7.pdf
- https://site-1166732.mozfiles.com/files/1166732/sonakuwufovasomobori.pdf
- https://site-1178773.mozfiles.com/files/1178773/bakedu.pdf
- https://cdn-cms.f-static.net/uploads/4367951/normal_5f8d515d06c32.pdf
- https://mosejibufo.weebly.com/uploads/1/3/4/4/134437632/e51b2c0.pdf
- https://static.s123-cdn-static.com/uploads/4413866/normal_6002dd82d8e53.pdf
- https://cdn-cms.f-static.net/uploads/4465007/normal_5fb4de09e6e6b.pdf
- https://fuwewarudizikip.weebly.com/uploads/1/3/4/6/134644733/1f2e980f.pdf
- https://cdn-cms.f-static.net/uploads/4366324/normal_5f8748d06fa63.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://s3.amazonaws.com/gavexilatuvitaz/chemie_formel_word_schreiben.pdf
- https://s3.amazonaws.com/zijivevip/filled_performance_appraisal_form.pdf
- https://s3.amazonaws.com/sejakopa/60784954562.pdf
- https://s3.amazonaws.com/tabobujimo/import_data_from_excel_sheet_to_matlab.pdf
- https://s3.amazonaws.com/fofeguj/kidunaziju.pdf
- https://s3.amazonaws.com/fuwawibu/barbara_cartland_gratuit.pdf
- https://s3.amazonaws.com/wujodibu/c_template_function_specialization_multiple_types.pdf
- http://www.w3.org/1999/02/22-rdf-syntax-ns#
- http://purl.org/dc/elements/1.1/
- http://ns.adobe.com/pdf/1.3/
- http://ns.adobe.com/xap/1.0/
- http://ns.adobe.com/xap/1.0/mm/
- http://ns.adobe.com/xap/1.0/rights/
- http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000ec87.bin` `d039f44686e69c00fe0b16e3c7257c0b7b237b9049dafdb06921357cfddfa82a`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEC87	3032 bytes
`font_01_sfnt_off0000f757.bin` `f37a1fcd61d7070d0b53c87b177be5a7cb03ebd281cba23dda9664d38906d6e7`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF757	5004 bytes
`font_02_sfnt_off00010863.bin` `a4e0b0817b5b8ce51e7bb158bfaaec589e4eebdd5c78216793190513cffc115b`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10863	10424 bytes

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