Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d0ad7739d38142f…

MALICIOUS

PDF

78.6 KB Created: 2021-03-18 11:04:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a74fbbb1b6a1810646e1137161e56ef4 SHA-1: 54f51c68a540710e3cec429cb08c196da09f7eed SHA-256: 3d0ad7739d38142fdcbc0605db366bf9c7421b1339f4b847d267cc505dc02419
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, indicating it is part of a link farm designed to manipulate search engine results or redirect users to malicious sites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the presence of numerous external URLs points to a redirection or download mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jottigo.ru/wix?keyword=behringer+vintage+time+machine+review
    • https://dutumujupag.weebly.com/uploads/1/3/1/3/131383630/zader.pdf
    • https://cdn-cms.f-static.net/uploads/4402486/normal_604016226acfa.pdf
    • https://jaxoruxevag.weebly.com/uploads/1/3/1/6/131606876/kitemaguzofi.pdf
    • https://cdn-cms.f-static.net/uploads/4384820/normal_5fd644f5bef00.pdf
    • https://cdn-cms.f-static.net/uploads/4481825/normal_600c68cb25ad5.pdf
    • https://cdn-cms.f-static.net/uploads/4426080/normal_604a166ae025f.pdf
    • https://nudegono.weebly.com/uploads/1/3/4/6/134682657/949697.pdf
    • http://nipodek.22web.org/shroud_of_turin_information.pdf
    • https://pomapufawupufus.weebly.com/uploads/1/3/5/3/135397804/fe7b94d4e4c.pdf
    • http://zabogena.iblogger.org/mit_google_maps_strecke_aufzeichnen.pdf
    • https://pofekivivefuron.weebly.com/uploads/1/3/5/3/135339802/4157598.pdf
    • https://jivimukik.weebly.com/uploads/1/3/0/7/130775904/8280440.pdf
    • https://tobadagagu.weebly.com/uploads/1/3/4/7/134750152/bobujopex.pdf
    • https://lovaxases.weebly.com/uploads/1/3/4/6/134685664/6bab6.pdf
    • https://static.s123-cdn-static.com/uploads/4405925/normal_5fed1bd7cedc8.pdf
    • https://cdn-cms.f-static.net/uploads/4485157/normal_60302d66ea5ce.pdf
    • https://cdn-cms.f-static.net/uploads/4491433/normal_602bddae5cd92.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://d4f1f58f-bd44-402a-a4b0-a3aa01e36dbf.filesusr.com/ugd/dffefa_c029912a303e43218fcbd27be977389e.pdf?index=true
    • https://e966359d-176b-477a-9ad9-c314bea94227.filesusr.com/ugd/fa6f14_838f6f844aa34b89b3d94435600f4567.pdf?index=true
    • http://lisowinuxofifok.rf.gd/como_entrar_no_whatsapp_web_android.pdf
    • https://aa3bb5c3-2bd4-4791-9e2a-6e31d5009b04.filesusr.com/ugd/60e703_db106d060ea4408ab8c3cb6740b7cb26.pdf?index=true
    • https://13a7c488-548c-4b48-b567-d2b0b9a3e1de.filesusr.com/ugd/85d67f_352f3e8f72804c6a8fd115e1b59c02d5.pdf?index=true
    • http://bavejoxobev.epizy.com/gonavevisisena.pdf
    • http://vadawowugozopul.epizy.com/dajapiparek.pdf
    • https://ecf8b3bd-8201-449f-a39c-156acd88681e.filesusr.com/ugd/97634b_bb795ba55c324cc3bc4326b67d088782.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f6a9.bin
20a4473db933ff86d4705ce012c3e7071fff3f3caa53f59e80a10b2d282b00a4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF6A9 5204 bytes
font_01_sfnt_off0001084d.bin
9a51b50ada7a97bfdf2b67e9413f8b3f5ee9c60fef10eb330563f518a68db9a5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1084D 10740 bytes

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