PDF malware analysis — malicious · be74dec8564a8e0b

MALICIOUS

PDF

79.3 KB Created: 2021-04-01 19:08:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25

MD5: b1f1c7bb31790053d559ebb6ba1d9daf SHA-1: d468db1b7088a66e02a338654197e38d260acfbc SHA-256: be74dec8564a8e0b07c64ce5e670d3099cbadfe295e2fd14095ad57bcde9767e

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm or phishing attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to download malware or engage in phishing. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malware delivery.

Machine Learning

Nyx PDF Classifier malicious score 0.9995

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://bologen.ru/aws?utm_term=fundamentals+of+game+design+2nd+edition+pdf+download PDF link annotation
- https://cdn.sqhk.co/mulepava/haZpiic/hovercraft_takedown_2p_mod_apk.pdfIn PDF document text
- http://sokavosutab.22web.org/97378395921.pdfIn PDF document text
- http://qwert-ita.fun/how_to_play_spore_without_registration_coded21eu.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4491926/normal_60186b96d9fe5.pdfIn PDF document text
- http://edaeda.moscow/que_significa_taller_de_induccion4j0qc.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4408862/normal_606528f94b2e9.pdfIn PDF document text
- http://zisujetev.iblogger.org/assembler_des_avec_foxit.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4446398/normal_5fd2460a42e46.pdfIn PDF document text
- https://cdn.sqhk.co/rinugezig/gih9PCO/into_the_badlands_blade_battle_apk_mod.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4406482/normal_6026f20d43ea2.pdfIn PDF document text
- http://changepass.online/ukulele_strumming_patterns_4_4d4fg6.pdfIn PDF document text
- https://cdn.sqhk.co/tudosiki/gjCi0Dq/loximunato.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4470836/normal_6052effd52fc4.pdfIn PDF document text
- https://cdn.sqhk.co/letarezetap/Gijjhq7/vepoxonojimugapotap.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://ea74ff18-003d-4094-8454-8d7e15e33abb.filesusr.com/ugd/50de67_8f48a91a1c84457ab523198574128b10.pdf?index=trueIn PDF document text
- http://bibirosomuxir.epizy.com/dekenonakepusedinerive.pdfIn PDF document text
- https://19a39513-20cc-49d1-a75c-e30ce0314142.filesusr.com/ugd/f99735_3352b301d46e4b24aff8980b221a911c.pdf?index=trueIn PDF document text
- http://kokasog.epizy.com/66490595709.pdfIn PDF document text
- http://narumigopu.epizy.com/setting_time_on_citizen_skyhawk.pdfIn PDF document text
- https://2489a575-72f7-492f-b117-28cfe4a4d2a3.filesusr.com/ugd/d81705_0deb88aae7c44c44aa0996dfda36425c.pdf?index=trueIn PDF document text
- https://551f0ad2-75d1-4009-b90b-2f3e3e20230b.filesusr.com/ugd/c2bf0a_5e2570aab0914132aefc306f39e09fa4.pdf?index=trueIn PDF document text
- https://d0a6b1b1-1773-4622-8b5e-0ab5990a7ed3.filesusr.com/ugd/b90ba1_f467272a486043b0a7403fad8af41145.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_off0000ea91.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEA91	5324 bytes
SHA-256: `7a8dfa60f07dbcde6973e9b6eebf3090de6986701c335e2c18ee08f62b41c72d`
`font_01_sfnt_off0000fcb4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFCB4	10596 bytes
SHA-256: `6c1a39c1ab9a928ce6decafaca621c34ff38e3b883bf463095c5716d448d14fc`
`font_02_sfnt_off000120c9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x120C9	4324 bytes
SHA-256: `05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176`

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