PDF malware analysis — malicious · 6f377fd5566e2d7c

MALICIOUS

PDF

79.7 KB Created: 2021-03-15 09:11:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02

MD5: f7ca3a9c4c5d36822536a76793831fd8 SHA-1: 1393a4f8be33f0a581d29165a678e754c6ab4a56 SHA-256: 6f377fd5566e2d7c014d75d45b4ef5feb15da70bc0d3829a3a45ac4aaf1d4891

186 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a large number of external links, many pointing to disposable domains, suggesting a link farm or SEO spam operation. The primary external URL observed is https://botokaw.ru/wix?keyword=salon+front+desk+training+manual, which is likely part of a phishing or malicious redirection scheme. No scripts were extracted from this sample.

Machine Learning

Nyx PDF Classifier malicious score 0.9998

Heuristics 6

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 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.
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://botokaw.ru/wix?keyword=salon+front+desk+training+manual PDF link annotation
- http://zoradiwa.iblogger.org/xadenirosuzep.pdfIn PDF document text
- https://cdn.sqhk.co/pajelidul/8Jrhg8u/becki_owens_paint_resource_guide.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4453105/normal_60432f1d292de.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4482207/normal_5fedf798bdd92.pdfIn PDF document text
- https://cdn.sqhk.co/jekefebiba/fiaURhd/bopuvul.pdfIn PDF document text
- https://cdn.sqhk.co/gasawivu/XhbVVaT/mikifigamaviladopakajis.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/87f897bc-3806-46cc-b5a1-39679085bc43/how_to_learn_cashier_work.pdfIn PDF document text
- https://s3.amazonaws.com/bizamesuwepe/internet_speed_meter_pro_apk_rexdl.pdfIn PDF document text
- https://1e438cd7-6f3b-42ac-a97b-d13a75fa135b.filesusr.com/ugd/0c268c_b1508903687b4e3bbac2f30be0d4c2d4.pdf?index=trueIn PDF document text
- https://uploads.strikinglycdn.com/files/088f7eaa-7855-428c-96f5-f601cfd611ae/16727682316.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/3868e55c-6cca-4947-89f2-8e712aaf516e/the_blue_book_of_grammar_free_download.pdfIn PDF document text
- https://88749095-6fd7-453f-8e8a-15b48fe47dd1.filesusr.com/ugd/e4d7df_67376fabc322448187e1e897a606e75f.pdf?index=trueIn PDF document text
- http://bugixud.epizy.com/french_wine_for_a_flat_belly_free.pdfIn PDF document text
- https://s3.amazonaws.com/rekorewexidiwo/how_to_card_count_6_deck_blackjack.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/5d8f4fe9-391c-4b83-bc85-f2c4b5d391d2/relative_clauses_worksheets_with_answer_key.pdfIn PDF document text
- https://04a9e765-cf69-4035-9b9a-998d8fb4e692.filesusr.com/ugd/8c5016_b582a45608da443686e9b5c3ff10e49c.pdf?index=trueIn PDF document text
- https://uploads.strikinglycdn.com/files/3116ab01-5243-4101-8619-a27fdabb1f57/barnes_and_noble_i_spy_books_for_toddlers.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_off0000f02a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF02A	5392 bytes
SHA-256: `c4f8dcfa8b587fd5ba0605bd51f58e8bf09107d4508fe96d9f291a27d4fa34db`
`font_01_sfnt_off00010266.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10266	1800 bytes
SHA-256: `daad3f347a4f42f432ee9983e619a7c063e36761dba5934b469418034847e28e`
`font_02_sfnt_off00010af4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10AF4	11192 bytes
SHA-256: `a19d5ed24decf7d9430c7d03d8058647bb7652e604a2fb513f45afc75db9a7d7`

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