PDF malware analysis — malicious · ed18ffa5ddab761f

MALICIOUS

PDF

72.8 KB Created: 2021-03-21 20:51:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25

MD5: 3024eb05d2c4516c1bcec56878ebea3a SHA-1: 285ec6f41b23986f9a2c316fb0c2634cd22ac829 SHA-256: ed18ffa5ddab761f7375b03d523f7112060046abc0c3df4701327088baa52f26

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains an embedded URI pointing to a suspicious domain, identified by heuristics as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious site.

Machine Learning

Nyx PDF Classifier malicious score 0.9997

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://maypoin.ru/wix?keyword=diagrama+hombre+maquina+ejercicios+resueltos PDF link annotation
- https://cdn.sqhk.co/vajegipofuz/fBhchaC/89540397912.pdfIn PDF document text
- https://cdn.sqhk.co/derebeduno/ibZgihi/truck_wallpaper_hd_1920x1080_4k_pc.pdfIn PDF document text
- https://cdn.sqhk.co/xakelafu/IgitQuC/pokemon_dark_rising_tm_cheats_codes.pdfIn PDF document text
- https://cdn.sqhk.co/tisewesir/zXpigia/there_you_go_johnny_gill.pdfIn PDF document text
- http://goterebilife.22web.org/futebimepekidapu.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://www.daltonmaag.com/In PDF document text
- https://s3.amazonaws.com/lupebesu/jokukasupatobefuxokefosuz.pdfIn PDF document text
- https://47e244ab-6b1f-4ae7-97e8-86de5b619f9f.filesusr.com/ugd/e1d12c_068b669dc8864ef6b90ec2885949faee.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/miledu/cherry_ripe_nutritional_information.pdfIn PDF document text
- https://6bda1257-ae7a-4fac-840f-d5dfc178f195.filesusr.com/ugd/f4de5e_cc1858789eaf4fd5959b7cc67e3bfa9f.pdf?index=trueIn PDF document text
- http://kewuzelaxapog.rf.gd/16163614066.pdfIn PDF document text
- https://s3.amazonaws.com/wutogugej/wozaxigevu.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/3d7368ba-3782-4d96-8fc9-ca71a1bec005/komagakitetuzobilido.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/30ff13e3-893f-4133-862c-1260dcbd3659/siwepazoxafenarinupujifor.pdfIn PDF document text
- https://8c17aa34-c454-4d6c-a218-8929c845e329.filesusr.com/ugd/808cd0_3e152d77f0514be5872c78f6dc99f8ac.pdf?index=trueIn PDF document text
- http://relizaki.epizy.com/edelweiss_general_insurance_company_limited_annual_report.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/c128fdff-c6fd-446e-944e-cd5053e55889/dibitoruzajaper.pdfIn PDF document text
- https://790985df-dfec-4a08-b509-00f37668cf87.filesusr.com/ugd/a421e3_a789c7a31a0b46ccaded7a690e782dd9.pdf?index=trueIn PDF document text
- https://uploads.strikinglycdn.com/files/5156f65b-f16a-45ed-b634-4a14b7d088eb/15616559287.pdfIn PDF document text
- https://49550882-97ce-44db-a38b-6e383bb81149.filesusr.com/ugd/062c90_82e65d7c821d413aa3d957eeb01d1a6e.pdf?index=trueIn PDF document text
- https://9005a25f-7293-4a73-bb0f-bc58e8c16807.filesusr.com/ugd/e3834b_11deee736a4c48dfbbfce9e029dae37c.pdf?index=trueIn 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000d1b5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD1B5	5436 bytes
SHA-256: `47504f78231f50a619da5294e2c17c6ea4520ff80956ec894febce20f78c4d76`
`font_01_sfnt_off0000e40d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE40D	10536 bytes
SHA-256: `ac2826bd31dbbd7a576486464c07cfdd59c02fe2a5e0a4011130db7f650c9144`
`font_02_sfnt_off00010721.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10721	4324 bytes
SHA-256: `cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34`

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