PDF malware analysis — malicious · 4a1d1329be030cb7

MALICIOUS

PDF

75.1 KB Created: 2021-04-04 10:55:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07

MD5: cc0227f80139373598eac6e9d3dcb107 SHA-1: 018bb37f58198b99b1180087605beeeacc1b4a01 SHA-256: 4a1d1329be030cb76352e77d16506d25d4666fcc94a67d5b18d94463f4e94c4c

164 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document exhibits characteristics of a phishing or malware distribution campaign, as indicated by the 'ML_NYX_PDF_MALICIOUS' and 'CLAMAV_DETECTION' heuristics. It contains a large number of external links, suggesting a link farm or a method to redirect users to malicious sites. The presence of a download button lure further supports the malicious intent. Although no scripts were extracted, the PDF structure and numerous external URLs point towards an attack pattern designed to trick users into downloading further malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.9990

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.
Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON

Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
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://nipisod.ru/123?utm_term=confidential+information+policy+template PDF link annotation
- https://wivezinafixozut.weebly.com/uploads/1/3/0/9/130969190/vuwukaropavosos.pdfIn PDF document text
- https://zanirifut.weebly.com/uploads/1/3/1/4/131407922/2b75cbba09b.pdfIn PDF document text
- https://jokikisiva.weebly.com/uploads/1/3/0/8/130873994/zowekabivixafe-kupujisipoz.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4377410/normal_6027a0e78f635.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4413016/normal_5fe06f229f036.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4444856/normal_5fe163d03d70b.pdfIn PDF document text
- https://sunajekivogemaz.weebly.com/uploads/1/3/4/8/134895881/wetoburunu-banazijokozava.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4471253/normal_5fdf5b9d027c3.pdfIn PDF document text
- https://vemisalisak.weebly.com/uploads/1/3/1/4/131437925/48a8d527b.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4459464/normal_6067e454e75d4.pdfIn PDF document text
- https://jiwalevimube.weebly.com/uploads/1/3/4/8/134870165/vudazutifexep.pdfIn PDF document text
- https://surutadalonuta.weebly.com/uploads/1/3/1/4/131455158/jesanofu.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4408875/normal_60176ce0cc444.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4450427/normal_5ffe6c3a0c7bf.pdfIn PDF document text
- https://vinovubetiloj.weebly.com/uploads/1/3/4/6/134679092/metajudo-silifeguz-lizotizaj.pdfIn PDF document text
- https://kosodakugup.weebly.com/uploads/1/3/4/6/134655388/0689d2.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://s3.amazonaws.com/mujevubutukoxu/flysky_gt3b_settings.pdfIn PDF document text
- https://s3.amazonaws.com/lowuwofuxali/top_10_books_to_read_free.pdfIn PDF document text
- https://s3.amazonaws.com/bogeguva/5156386320.pdfIn PDF document text
- https://s3.amazonaws.com/saxefi/75024754621.pdfIn PDF document text
- https://s3.amazonaws.com/zufaxepixiguxax/tavitenam.pdfIn PDF document text
- https://s3.amazonaws.com/lemerisinivum/56816690440.pdfIn PDF document text
- https://s3.amazonaws.com/jivamubug/como_resolver_problemas_de_ecuaciones_de_primer_grado_con_fracciones.pdfIn PDF document text
- https://s3.amazonaws.com/fujadabez/browsec_premium_mod_apk_0._27.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_off0000e8d6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE8D6	5132 bytes
SHA-256: `9a0f1b595800b215f5943bb112f80d8cb5a89342d48d600bdfa1e2cb85193a88`
`font_01_sfnt_off0000fa3c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFA3C	10236 bytes
SHA-256: `caa659d42f4d70f4e2f81f40ab4c85eb4c0af0501d1086f675cf0c15279b8323`

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