PDF malware analysis — malicious · b703e4d07e0dcce5

MALICIOUS

PDF

86.0 KB Created: 2021-04-03 15:10:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02

MD5: 74b1522859759d10d47b4ba5e0d7dac5 SHA-1: a3fd7a38bd698745d9cc64d0f8adea97d5631e66 SHA-256: b703e4d07e0dcce5b19779c6d06aad09f55f31bda419063291ee44165dcf2113

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains numerous external URIs, including a prominent one that appears to be a keyword-targeted link farm, suggesting a phishing or ad-revenue generation scheme. The presence of embedded URLs and the overall structure point towards an attempt to redirect users to potentially harmful websites.

Machine Learning

Nyx PDF Classifier malicious score 0.9992

Heuristics 5

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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://leonvi.ru/wix?keyword=star+wars+republic+gunship+model+kit PDF link annotation
- http://xomerisupudegop.medianewsonline.com/rastafarian_language.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4446937/normal_6058593d322e6.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4379964/normal_5fe4b16e08c4c.pdfIn PDF document text
- http://rejorevubirobu.sportsontheweb.net/89735812917.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4443354/normal_6013773b39619.pdfIn PDF document text
- http://odemebayisitrafik.com/55684803444rl09w.pdfIn PDF document text
- http://fevinoreniwelik.sportsontheweb.net/68904784389.pdfIn PDF document text
- http://vakiduweg.mygamesonline.org/72998313882.pdfIn PDF document text
- http://fidesuwuranotif.getenjoyment.net/adding_and_subtracting_integers_practice_worksheet.pdfIn PDF document text
- http://ductsunlimitedins.com/lewopekafogoxvill.pdfIn PDF document text
- http://rowomonug.mywebcommunity.org/is_classical_guitar_easier_than_acoustic.pdfIn PDF document text
- http://vumagiwupesaka.22web.org/kagaw.pdfIn PDF document text
- http://dorulezebum.sportsontheweb.net/why_is_it_important_to_have_clear_goals.pdfIn PDF document text
- http://daxamel.mywebcommunity.org/5169444129.pdfIn PDF document text
- http://openplafond.xyz/1696378977081r5w.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4418383/normal_5fe19350a8618.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://revuzulikasulo.epizy.com/84777163061.pdfIn PDF document text
- http://wejivuwipo.epizy.com/answer_key_eureka_math_grade_1.pdfIn PDF document text
- https://5090cb7a-f7dd-45b7-a4a3-960150b62b23.filesusr.com/ugd/dfd4af_8d0a27a442e54e9b9a9a2b0031dccf5a.pdf?index=trueIn PDF document text
- http://xawiwevivuzox.onlinewebshop.net/2098783495.pdfIn PDF document text
- http://mawidinivetobi.myartsonline.com/zolosedozule.pdfIn PDF document text
- https://2c9641c8-5874-4869-9b94-f1378e60aa6b.filesusr.com/ugd/efc1f6_d3bc4b5b3c9448e7ab1f37e444404fe9.pdf?index=trueIn PDF document text
- https://c1d61d78-9bae-425c-b347-ee91470fe4f1.filesusr.com/ugd/60933b_617d5bbb1f504b69bbab36d4226f944f.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
- 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_off0000ec26.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEC26	5884 bytes
SHA-256: `5ac2213163bd61a3d0c8a8a68f10dc5822f469bc6505e9497892359a3ef1bec1`
`font_01_sfnt_off0001000c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1000C	17064 bytes
SHA-256: `bcd14f2be7b4df38eeadc8ad485f153c40c3eee47b9de05924e96c46711f33d1`
`font_02_sfnt_off00013546.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13546	16100 bytes
SHA-256: `513236b56cd24d18f1916a542380e1656fe596eca6e14df5516133ff488da9f9`

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