PDF malware analysis — malicious · 3196b7a94aba32f9

MALICIOUS

PDF

87.2 KB Created: 2021-05-03 20:42:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27

MD5: 765371cc0d1e7632f5fcbd3a3d47def8 SHA-1: ca24477858e09274adbffaa42cda7ced0ab5450d SHA-256: 3196b7a94aba32f9b6af7a8edd89e7e2b0e96ec08470e62d61405da1bb968319

186 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a link farm. It contains numerous external links, many hosted on disposable domains, suggesting an attempt to redirect users to potentially malicious websites. The embedded URLs and the PDF structure indicate a phishing or SEO-based malicious campaign.

Machine Learning

Nyx PDF Classifier malicious score 0.9983

Heuristics 6

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 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.
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://mezovuduw.ru/strik?utm_term=motorola+apx+6000+battery+life PDF link annotation
- https://jovegubegatok.weebly.com/uploads/1/3/5/3/135318826/zabugonile.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4500904/normal_6010ccb6b9661.pdfIn PDF document text
- https://lutomired.weebly.com/uploads/1/3/5/3/135316507/9260553.pdfIn PDF document text
- https://cdn.sqhk.co/rekubapapup/ehbOiie/cruise_line_covid_testing.pdfIn PDF document text
- https://josebugovoje.weebly.com/uploads/1/3/0/7/130738719/1511944.pdfIn PDF document text
- https://ruzutemeba.weebly.com/uploads/1/3/2/6/132681300/8085413.pdfIn PDF document text
- https://wedutigumufezeb.weebly.com/uploads/1/3/4/6/134659425/216072.pdfIn PDF document text
- https://sewigemebovoneb.weebly.com/uploads/1/3/3/9/133997870/629631.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4372719/normal_602c3ec34ee80.pdfIn PDF document text
- http://sinomefonok.mywebcommunity.org/61909494552.pdfIn PDF document text
- https://rezawefid.weebly.com/uploads/1/3/5/9/135978206/3881682.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4411500/normal_6007de783980e.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4473892/normal_5fd7afe5e8761.pdfIn PDF document text
- https://fisadurubimu.weebly.com/uploads/1/3/1/4/131409264/mazeraga-kivat-wovazu-tamizixako.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4405642/normal_5ff94301eb9c1.pdfIn PDF document text
- https://cdn.sqhk.co/xaxovowupofa/ijdLOgd/turinubirix.pdfIn PDF document text
- https://vedixoba.weebly.com/uploads/1/3/4/8/134864822/wimevorobajobasaja.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://153f2bed-3501-4ec5-9468-ed1987511f6d.filesusr.com/ugd/f67134_3c22e4ed9fe44832af9e7fbe1a5f1852.pdf?index=trueIn PDF document text
- http://jomupaz.myartsonline.com/dixirefajex.pdfIn PDF document text
- https://c6b89c2f-dc7d-490d-a648-077c51828da9.filesusr.com/ugd/29ab01_f8a8bb25a5bd47189837d30f3b02e669.pdf?index=trueIn PDF document text
- https://8aefc570-8454-48c3-bb63-d4d1067b7ce0.filesusr.com/ugd/5c9621_c92c5564163e421a98640b3493b9cc6a.pdf?index=trueIn PDF document text
- http://duxegejuw.atwebpages.com/clasificacin_de_los_nmeros_reales_ejercicios.pdfIn PDF document text
- https://20996a60-9695-4f45-8fdb-44bdc783da55.filesusr.com/ugd/c57cae_7660bc8d5a024722b94e8104596e0a3c.pdf?index=trueIn PDF document text
- https://dc688580-c0ec-4ade-910b-7abffd870ab4.filesusr.com/ugd/096b61_936e212c474e46cf9b6b1a25ee462566.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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000f435.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF435	2952 bytes
SHA-256: `e211f2d6e0d1bf1fd17bd5150bc2724fb7c0f1d37b1c69b855d9dcad8de34ab0`
`font_01_sfnt_off0000fec3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFEC3	5328 bytes
SHA-256: `433e67032e5e32b6d731eabba9c48a0547845640c00046ceb5d9ded4b0491ac7`
`font_02_sfnt_off00011101.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11101	11664 bytes
SHA-256: `cc06271466ea6b1caa4819bba4a4d0c7108070a8aa150278b9e1d62947d74d44`
`font_03_sfnt_off0001387a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1387A	16460 bytes
SHA-256: `012bf4c2f2303dd570f5c0063ed34764aec83978271a15c7662d4d24577f6c9d`

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