PDF malware analysis — malicious · 5c1e0635067ea83b

MALICIOUS

PDF

89.3 KB Created: 2021-04-01 20:51:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 71cdf827363ec173bc750995c2bb95a1 SHA-1: 542c7efa34b6c1cd8afd3fb8cecdf41fe014c1e1 SHA-256: 5c1e0635067ea83b4a63aca12d4831c685333116599a56b62e01d95169a377e9

186 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO poisoning tactic. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were extracted, the PDF structure and numerous external links point towards an attempt to redirect users to malicious sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9996

Heuristics 6

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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://gimoguvi.ru/award?keyword=tableau+aliments+riches+en+omega+3+pdf
- http://balewezekowesab.iblogger.org/tefuguvinubogopad.pdf
- http://warajuvevuv.medianewsonline.com/ganoderma_lucidum_articulos_cientificos.pdf
- https://cdn-cms.f-static.net/uploads/4489853/normal_605c3f3f112a6.pdf
- https://cdn-cms.f-static.net/uploads/4406466/normal_6021757609f7a.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- http://www.daltonmaag.com/
- https://c46c713f-5e69-4c64-aad4-d86f29440f76.filesusr.com/ugd/957c7b_56bc1122c0cb484395e2c65d5be158df.pdf?index=true
- https://aefbb2f1-1cfc-4a48-aab2-d72547d84173.filesusr.com/ugd/2f3ac6_037e6147cf324382af9158d833b14895.pdf?index=true
- https://86f5e18a-8766-4ae7-b9bf-31430b627380.filesusr.com/ugd/911c12_a4edc3167ee14a5bb3e38bd11125128e.pdf?index=true
- https://uploads.strikinglycdn.com/files/e2a8e137-221d-4dc0-99da-138870e8e043/5410097505.pdf
- https://6a24fdd2-d4a5-4c4b-882b-0f3115751bcf.filesusr.com/ugd/04e6f9_9e37c453a1c747a8b378becf062a20f2.pdf?index=true
- https://4cd5a77a-be8d-44ba-8952-4177873115c4.filesusr.com/ugd/930050_67d0c6c91e1f46f5826d0bdf626eba0c.pdf?index=true
- https://uploads.strikinglycdn.com/files/20b98c6f-0f0f-4de6-8c86-53f4e6f5da54/35423637047.pdf
- http://xaxeziru.epizy.com/21929085631.pdf
- https://e22e8d81-f41f-4d51-abb1-39b19d2d32bb.filesusr.com/ugd/96bf9d_5beef67429024b62ae5d1e240e8de336.pdf?index=true
- https://1fa67a36-2e8b-44cc-a955-751d80433762.filesusr.com/ugd/d85e51_c351aafe251049c8b70bde97e5b765fb.pdf?index=true
- https://uploads.strikinglycdn.com/files/6054b920-0994-4124-95cf-b461bb683725/how_to_program_liftmaster_security_plus_remote.pdf
- http://gevejonitu.onlinewebshop.net/brushless_dc_motor_fundamentals.pdf
- https://c4e42e93-254c-4ba8-b495-737f84002742.filesusr.com/ugd/ddb60a_ce4436fb7ed64f5da6d7b03b4514acc8.pdf?index=true
- https://4993f9ff-345c-4c03-a8ec-d4f8dac664d6.filesusr.com/ugd/debbe1_5f9de95025be43c191f078202275d702.pdf?index=true
- https://uploads.strikinglycdn.com/files/50edd7cb-020d-42e7-9062-45420eece413/dios_sea_exaltado_letra_y_acorde.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
- http://dejavu.sourceforge.net
- http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000f612.bin` `691f1acd2b8fbc6b9d5f5d4033c474943648ec35fd3bc438e1cacc1959569308`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF612	5704 bytes
`font_01_sfnt_off0001093e.bin` `4f35a653e181925f0abc44c3bec4b568d414b7fe16c752d313b0285a1c514833`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1093E	13152 bytes
`font_02_sfnt_off000132cf.bin` `3bb08857b08983a257d5a2052628e18542fd51c8d29f5bbef87ea8b8ace00841`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x132CF	16096 bytes
`font_03_sfnt_off00014798.bin` `4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x14798	4324 bytes

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