PDF malware analysis — malicious · 2d158bd70b20d385

MALICIOUS

PDF

81.8 KB Created: 2021-03-26 14:45:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25

MD5: cf5e0b52b5ae21fd0ea935cfbd416fd4 SHA-1: deae8b4b963e72fe49b2918e681a18ac745cfc5e SHA-256: 2d158bd70b20d385fbc4a9ef53ba9e2f649d44eaefa63a14de3bd19135db976f

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous embedded URLs, many of which point to disposable hosting or suspicious domains, suggesting a phishing or malware distribution attempt. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a deliberate attempt to create a network of links on low-reputation sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or trojan delivery.

Machine Learning

Nyx PDF Classifier malicious score 0.9990

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://xajibur.ru/wix?keyword=tire+hammer+for+sale PDF link annotation
- https://julavatevimire.weebly.com/uploads/1/3/4/6/134669339/3678504.pdfIn PDF document text
- http://ladyso.ru/784177539698yu4u.pdfIn PDF document text
- http://pugisapi.mypressonline.com/49350404359.pdfIn PDF document text
- http://swiss-gear-top.xyz/skmei_watch_sr626sw_priceeplhd.pdfIn PDF document text
- https://cdn.sqhk.co/repipedifavi/MhgeDH5/wujadotix.pdfIn PDF document text
- https://cdn.sqhk.co/lanuniwa/gRiiiaQ/35435844639.pdfIn PDF document text
- http://fapseo.ru/puguvojiwufagia3j5f.pdfIn PDF document text
- http://sakhavto.ru/divuxijo1x4k1.pdfIn PDF document text
- http://cetop.xyz/bergeys_manual_of_determinative_bacteriology_9th_edition_freerrp5s.pdfIn PDF document text
- https://cdn.sqhk.co/rafumufo/iiqgcgj/xodikasakis.pdfIn PDF document text
- https://cdn.sqhk.co/lekusovu/icOFjBv/panuzewop.pdfIn PDF document text
- https://wodirukuz.weebly.com/uploads/1/3/5/3/135398055/f239ca22.pdfIn PDF document text
- http://lemakomude.sportsontheweb.net/siledonomonanudajixebum.pdfIn PDF document text
- https://cdn.sqhk.co/wodaximewule/fMJzjh8/sojowulefidapadokiluxud.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://uploads.strikinglycdn.com/files/43a3512c-5f2b-446e-943a-161ecf747e0e/vox_ac15_cx1.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/3f45e2c7-ecee-47c3-aa50-550122988751/2998157505.pdfIn PDF document text
- https://s3.amazonaws.com/lukepepe/tedonimewakuz.pdfIn PDF document text
- https://s3.amazonaws.com/sivanira/volleyball_rotation_tracking_sheet.pdfIn PDF document text
- https://s3.amazonaws.com/xoferuzu/lexevujibasagez.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/1719ba30-c513-48cb-a255-cf4cbe0ff026/honeywell_visionpro_4000_programmable_thermostat_1h_1c_th4110d1007.pdfIn PDF document text
- https://s3.amazonaws.com/sukobogixe/zonidikaromubasevi.pdfIn PDF document text
- http://nafaradevofipaf.myartsonline.com/gaxunogidize.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/8860cb1b-8cd5-46e3-8309-e5b9c7598b63/el_arte_de_la_guerra_de_sun_tzu.pdfIn PDF document text
- http://lojibovel.myartsonline.com/dizefidetuguxed.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/8cde4f0c-9c51-4296-b10e-01f9d55f59fe/what_percentile_is_good_on_the_gre.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000f70b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF70B	4556 bytes
SHA-256: `28da13e2595b4c299e1f2a9863e57cf14d29690af57c897534a5e1815a7acd68`
`font_01_sfnt_off00010672.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10672	11032 bytes
SHA-256: `3f604cc539dad9c20f559d8c9b6f6eee63423bd34f6950b5f8fa3f4ed60fbb08`
`font_02_sfnt_off00012c02.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12C02	4324 bytes
SHA-256: `4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3`

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