PDF malware analysis — malicious · 06b06b6aa21369a5

MALICIOUS

PDF

80.3 KB Created: 2021-02-20 09:59:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26

MD5: 298ff331de796b75a9069552cfb613ff SHA-1: 29dc0ddbb6af0d09a7230b03c29cd5cd9f25d62d SHA-256: 06b06b6aa21369a501349e16d4e618c4397b043cb2c803baa36aa8e1aef084bb

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file is a PDF document identified as malicious by ClamAV and an ML classifier. It contains numerous external links, including one to 'baarspo.ru', suggesting a link farm or phishing attempt. The document body, though heavily obfuscated, appears to reference 'crossword answers', a common lure for phishing or scam content. No scripts were extracted, but the PDF structure and link farm indicate a malicious intent to redirect users to potentially harmful websites.

Machine Learning

Nyx PDF Classifier malicious score 0.9991

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://baarspo.ru/wix?keyword=realidades+2+capitulo+4a+crossword+answers PDF link annotation
- https://cdn-cms.f-static.net/uploads/4493282/normal_600b2ac75b558.pdfIn PDF document text
- https://nukanepinax.weebly.com/uploads/1/3/1/4/131454046/4931613.pdfIn PDF document text
- https://kokezixunilo.weebly.com/uploads/1/3/4/0/134096179/vobope.pdfIn PDF document text
- https://nojarotawufa.weebly.com/uploads/1/3/4/3/134313922/sigugelene-vilin.pdfIn PDF document text
- https://nametipij.weebly.com/uploads/1/3/1/1/131164318/merusoj.pdfIn PDF document text
- https://sadavixiji.weebly.com/uploads/1/3/5/3/135333995/terev.pdfIn PDF document text
- https://savatevadenu.weebly.com/uploads/1/3/1/4/131452836/5335417.pdfIn PDF document text
- https://rawubewo.weebly.com/uploads/1/3/1/4/131405976/boviduxilob.pdfIn PDF document text
- https://jifalutisapore.weebly.com/uploads/1/3/4/7/134772579/favogi.pdfIn PDF document text
- https://zupalopozaguri.weebly.com/uploads/1/3/2/3/132302876/vuxinigibefef.pdfIn PDF document text
- https://domilejoxu.weebly.com/uploads/1/3/4/5/134529458/zetebudufujegexe.pdfIn PDF document text
- https://godowipi.weebly.com/uploads/1/3/4/5/134520373/madafafize_popib.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4476282/normal_601b482b16cb4.pdfIn PDF document text
- https://pomapufawupufus.weebly.com/uploads/1/3/5/3/135397804/36c2549e4a.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4417206/normal_5fd0545ec6f0f.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4387035/normal_60220bab0262b.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4500897/normal_601741b4ddbe5.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/resabomibogodaw/45526842026.pdfIn PDF document text
- https://s3.amazonaws.com/tugumeb/59786296669.pdfIn PDF document text
- https://s3.amazonaws.com/zijivevip/summertime_saga_mrs_bissette_test_answer.pdfIn PDF document text
- https://s3.amazonaws.com/fisulefajow/outofmemoryerror_at_android._graphics._bitmapfactory._nativedecodestream.pdfIn PDF document text
- https://s3.amazonaws.com/vikukinumet/barashada_af_somali.pdfIn PDF document text
- https://s3.amazonaws.com/jozaponi/96321053195.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_off0000e84a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE84A	5388 bytes
SHA-256: `7c73819194056ddcf734d6d102d7aa7621d6cd0e770bbd9f71adae18162fd2fa`
`font_01_sfnt_off0000fac7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFAC7	10392 bytes
SHA-256: `b23feea95d9b00c6ac24d4893f6a6a3fe64b699da3a0ac7e615cb4e9a978ba99`
`font_02_sfnt_off00011e83.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11E83	16092 bytes
SHA-256: `e9fe716c2abc985b12a899a49d5539e4e8be1b56d50c083b30290d85a2a7c848`

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