PDF malware analysis — malicious · 858a51003c448d3c

MALICIOUS

PDF

90.1 KB Created: 2021-03-15 02:35:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02

MD5: 2cfb9c37e677bf9541a2babf445a95eb SHA-1: e7d57e90de0f732086e76f8a5e6b81b555b3526f SHA-256: 858a51003c448d3c17cc81d81da2949b141f68853e2cdf20cfbe3129a3996e84

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. It contains an embedded URI pointing to a suspicious domain, 'soxebez.ru', which is likely used to host a phishing page or distribute further malware. The document body is heavily obfuscated, but the presence of external URIs and the overall heuristics suggest a phishing or malware delivery attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9992

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://soxebez.ru/strik?utm_term=a+lens+produces+a+real+image+of+a+real+object PDF link annotation
- https://cdn-cms.f-static.net/uploads/4465919/normal_602a9af241ca7.pdfIn PDF document text
- https://cdn.sqhk.co/kotolodegag/IBifjdP/60628453151.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4485301/normal_603b260828edb.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4480389/normal_5fdf07957b093.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4403688/normal_602e23f6265ab.pdfIn PDF document text
- https://cdn.sqhk.co/soziwariru/jaJgiie/awesome_voice_recorder_x.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4470524/normal_60268524afdfa.pdfIn PDF document text
- https://cdn.sqhk.co/towevefizub/Agg8gcy/topeduxule.pdfIn PDF document text
- https://cdn.sqhk.co/sunidoxil/dbji7ig/zombie_gunship_free_mod_apk_android-_1.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://uploads.strikinglycdn.com/files/9c046c9b-9421-427b-b8d1-32b1a67d2906/what_are_the_four_elements_of_critical_thinking.pdfIn PDF document text
- https://s3.amazonaws.com/jawusawar/roxanedarete.pdfIn PDF document text
- https://74269c25-1731-4359-90d4-804f54ef9c1c.filesusr.com/ugd/b5973a_35e222c2669f49888e21191f48b1863e.pdf?index=trueIn PDF document text
- https://03a45e23-20c9-4b13-8d21-50c2609e56df.filesusr.com/ugd/502f3d_2bcee2170aaf4f07b1c0a21e63bb7813.pdf?index=trueIn PDF document text
- https://d4508431-0eee-4913-ac2a-2ec907ed9b18.filesusr.com/ugd/12daa7_7a843e4560304f2eacbac1ee2bfe19b5.pdf?index=trueIn PDF document text
- https://uploads.strikinglycdn.com/files/c835c6d1-015e-48ae-92cd-10e05ce7f7fa/xidosuwore.pdfIn PDF document text
- https://s3.amazonaws.com/gotitibekovi/62595951406.pdfIn PDF document text
- https://75e6061f-eb7a-4ce8-b546-077bf96366c3.filesusr.com/ugd/2dfd19_7a6a668713ac4a848de00113d3c84a3c.pdf?index=trueIn PDF document text
- https://01c4c9a3-ee74-4db9-a65d-799443b8dbf1.filesusr.com/ugd/a64c8c_4e3659f28e19434bace329bac0901949.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/lepefi/how_to_study_for_med_surg_hesi.pdfIn PDF document text
- https://4a31e3f8-49e3-4331-b1a9-c0bb7a6b9dbc.filesusr.com/ugd/599f1c_16f510d34e2746a897afaec7321c910a.pdf?index=trueIn PDF document text
- https://uploads.strikinglycdn.com/files/b40dcc54-ab16-482e-9912-60864ac20aff/sportdog_sdt00_battery.pdfIn PDF document text
- https://58552d80-c20c-4e4f-99b9-91bedbcc07a3.filesusr.com/ugd/c18496_f36dd71460ba4b94a880aa24562496d3.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/dezajok/android_9_update_name.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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00011fec.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11FEC	5680 bytes
SHA-256: `5ca990fd3c32c15cd25b96aeab18534d7e161a3fb2280c2bfe4130bc727597cf`
`font_01_sfnt_off0001332e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1332E	11540 bytes
SHA-256: `1c772dbb0e4f941b8a169df54ae8c05d0b23d7f6dbff637ead36fb537a5ed038`

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