PDF malware analysis — malicious · 890bf4a03a3be74d

MALICIOUS

PDF

79.0 KB Created: 2021-05-19 17:53:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29

MD5: c881f1eb429f19579bf1996e65a4b234 SHA-1: 6869ea73cfb7c799d78ce542978287cea1afeb0a SHA-256: 890bf4a03a3be74d4fd778af52f0e9b645e9eb7e5d80d89c72af87828a69ddad

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

Nyx PDF Classifier malicious score 0.9990

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 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.
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/wb?keyword=zorba%20the%20greek%20dance%20flash%20mob PDF link annotation
- https://webuxeneme.weebly.com/uploads/1/3/4/3/134368634/nogusafimujix.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4480173/normal_603ad1b49eabd.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4379613/normal_60689dbcd9227.pdfIn PDF document text
- https://ratipixudaxixix.weebly.com/uploads/1/3/4/4/134472160/7658979.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4485570/normal_600165f9a99d0.pdfIn PDF document text
- https://repadugudemi.weebly.com/uploads/1/3/0/9/130969496/rubozef-fezolukire.pdfIn PDF document text
- https://dixapixukezawe.weebly.com/uploads/1/3/5/3/135388261/fipixuveget-putodofokeletop.pdfIn PDF document text
- https://pesasujax.weebly.com/uploads/1/3/4/8/134882000/0e35a0.pdfIn PDF document text
- https://kidogotetivi.weebly.com/uploads/1/3/4/3/134375399/1fed9cac15eb.pdfIn PDF document text
- https://zonulezewuras.weebly.com/uploads/1/3/4/8/134890742/nopipuf-vewej-duxomo.pdfIn PDF document text
- https://xeruwuxopexok.weebly.com/uploads/1/3/4/4/134467304/gikitopaga-lepab-kijupujono.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4465548/normal_5fc80c1d0cf99.pdfIn PDF document text
- https://dunabosugetagek.weebly.com/uploads/1/3/4/6/134601841/kamisagagebepu_gularunemop.pdfIn PDF document text
- https://vakalebixop.weebly.com/uploads/1/3/5/3/135339933/topigowi.pdfIn PDF document text
- https://revogofoti.weebly.com/uploads/1/3/3/9/133999152/7447505.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4446931/normal_603b140f76627.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/wunupalezozerud/full_body_workout_routine_for_beginners.pdfIn PDF document text
- https://s3.amazonaws.com/zonivezada/can_you_see_my_heart_sheet_music.pdfIn PDF document text
- https://s3.amazonaws.com/sewamos/fugopa.pdfIn PDF document text
- https://s3.amazonaws.com/mufukep/california_code_of_regulations_citation_format.pdfIn PDF document text
- https://s3.amazonaws.com/dejazuvorira/87072024440.pdfIn PDF document text
- https://s3.amazonaws.com/nojemi/ximorananofarusimofubipa.pdfIn PDF document text
- https://s3.amazonaws.com/rujimidujek/little_red_riding_hood_costume_pattern_adults.pdfIn PDF document text
- https://s3.amazonaws.com/nijudow/vapejixumu.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
- http://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000cd16.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCD16	5596 bytes
SHA-256: `82e8c53ee08f7a2dac9ed9cba02312cb68040f559147815a42e2d0dff2dceb7f`
`font_01_sfnt_off0000dff9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDFF9	15324 bytes
SHA-256: `cb0ea8bd8f6dcfa1bdd21e579312148a0e53223ebc7f31e2e12c9085d73e7919`
`font_02_sfnt_off00010eb0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10EB0	18776 bytes
SHA-256: `dabf0ccc451caf4864c9b22ca91318a92e8f625b469dd0561edf59b451c7a792`

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