PDF malware analysis — malicious · ae3e10c6746e2722

MALICIOUS

PDF

78.3 KB Created: 2021-03-13 21:13:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18

MD5: 8df261bfe140f75c24bcc3a6807d9f13 SHA-1: 5914b4c46102ede8aea799595b9d18568e65de2d SHA-256: ae3e10c6746e27225a109d377773a5e36e8f6acf72da41a1c2bbe5f716370a70

186 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file exhibits characteristics of a link farm, containing numerous external links pointing to various domains, many of which are hosted on disposable or free hosting services. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded URLs and the PDF structure suggest an attempt to obscure the true destination and potentially evade detection.

Machine Learning

Nyx PDF Classifier malicious score 0.9997

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.
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://jottigo.ru/123?utm_term=calderas+industriales+pirotubulares+pdf PDF link annotation
- https://ralirepiputup.weebly.com/uploads/1/3/4/8/134852471/lasigeroz.pdfIn PDF document text
- http://thedefenseforge.com/6354848161jsj0i.pdfIn PDF document text
- https://deziledage.weebly.com/uploads/1/3/4/3/134339849/dusazajavupaniv_limafawuzaz_mokilaputiri_xogukew.pdfIn PDF document text
- https://fagadixiridare.weebly.com/uploads/1/3/5/3/135304990/mufuladifodugegib.pdfIn PDF document text
- http://gukiduwonaxinef.getenjoyment.net/wovulaxomureso.pdfIn PDF document text
- http://vazawujuzu.sportsontheweb.net/54462326083.pdfIn PDF document text
- http://storeeuro.info/liwubibexugpb7gi.pdfIn PDF document text
- https://sakotitalivuvu.weebly.com/uploads/1/3/4/8/134887700/bemes_fijixas_mizitelapobiko.pdfIn PDF document text
- https://vavetoros.weebly.com/uploads/1/3/4/8/134854671/wuvudadip.pdfIn PDF document text
- http://zezomaxijuduj.22web.org/thames_water_assistance_fund_application_form.pdfIn PDF document text
- http://milesnires.xyz/commerce_mcqs_with_answersisrnf.pdfIn PDF document text
- http://idealicaufficiale.website/rosemarys_baby_streaming_ita_cb014pm44.pdfIn PDF document text
- http://fontawesome.iohttp://fontawesome.io/license/In PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://luwefotikejumu.rf.gd/48896085056.pdfIn PDF document text
- http://rodobokojezaga.epizy.com/indefinite_admittance_matrix.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/d1b9c385-d8e5-44fc-a13a-50d5bb418901/22311300461.pdfIn PDF document text
- https://8b62b971-d575-4461-ae89-9de7a2afac08.filesusr.com/ugd/c5a911_999a737afc9d483ebc42e189ca923f5d.pdf?index=trueIn PDF document text
- http://kiwajuku.epizy.com/african_union_passport_application_form.pdfIn PDF document text
- https://883cd1dc-02d0-4059-8fa2-99201f92b631.filesusr.com/ugd/6166c9_c0e446069314428282deac61bcb2dd4e.pdf?index=trueIn PDF document text
- https://uploads.strikinglycdn.com/files/e37512cf-3352-4181-8e30-97c3fa40c346/ask_and_it_is_given_barnes_and_noble.pdfIn PDF document text
- http://dogiwexor.myartsonline.com/66884850569.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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000ec00.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEC00	1584 bytes
SHA-256: `7b163f0f2273e457ef06140b984bd667b01bbb3c14eac7ece172106c69300d65`
`font_01_sfnt_off0000f40b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF40B	5080 bytes
SHA-256: `71bebd1acf82578d8801bbf6a72c4a8f712612959412bd974894e0f8ca4fd20c`
`font_02_sfnt_off0001054f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1054F	11168 bytes
SHA-256: `2c1a9627e0a69dcebd7b7220923736775cb0d7f2b4b0a2efaaa8d1b7a778c426`

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