PDF malware analysis — malicious · 766bd1d016fa0b4d

MALICIOUS

PDF

85.2 KB Created: 2021-03-27 12:36:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24

MD5: bb4b3911e4e2d0f9bbb1633c17116b04 SHA-1: 5ae506846b539dcbe508c972f342a7c7d0ebbac3 SHA-256: 766bd1d016fa0b4d1a99f4e5a2482f4b4fb15247c3182f70548e1ca1033f9ee0

134 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 and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

Nyx PDF Classifier malicious score 0.9992

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 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.
Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON

Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
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://xezojetit.ru/wix?keyword=connectify+apk+pro PDF link annotation
- http://marketitaly.info/cerato_2011_ex3_manualgytxc.pdfIn PDF document text
- http://7lessons.fun/gokumipalurawasagutazeruzmz0la.pdfIn PDF document text
- https://bawidonawasaz.weebly.com/uploads/1/3/4/3/134354070/8162326.pdfIn PDF document text
- https://tofudilasikota.weebly.com/uploads/1/3/0/9/130969343/34333bb52.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4418993/normal_60069b13bcdca.pdfIn PDF document text
- https://bopevifobomamak.weebly.com/uploads/1/3/0/8/130814579/3506791.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4410730/normal_6023e79595806.pdfIn PDF document text
- http://devgm.design/nebizobomemojegubejobopo64d5x.pdfIn PDF document text
- http://milansit.space/373679749132lsz0.pdfIn PDF document text
- http://cybety.xyz/67885227337qsqbp.pdfIn PDF document text
- http://vclean-sale.shop/balboa_spa_error_code_lf51ggb.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4393029/normal_6029793b5d6e7.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4465688/normal_603547869a200.pdfIn PDF document text
- http://razvivatel.blog/ziwavakesadasovujolaseww41iv.pdfIn PDF document text
- http://sosed.market/medical_administrative_assistant_resumeak4j8.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4392215/normal_5ff9bd38a3f3b.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4419847/normal_605db68cd05cf.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4378425/normal_6059a0ad7e08f.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4458388/normal_600b8ff7b099f.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4454422/normal_60549cc9d2d07.pdfIn PDF document text
- http://leftoutclub.com/is_nas_server_worth_itfx4dr.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://7e574f8b-ef34-4833-8dee-b18f3ac9fc91.filesusr.com/ugd/af8ffd_4da3398eb37d41b2bc36d58a4c8e9329.pdf?index=trueIn PDF document text
- https://104e0e48-a4c2-4a03-8647-06ef64d4e6ac.filesusr.com/ugd/e2c6c1_3b870769bfdd45939cfe460dbecf2ba4.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_off0000f72e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF72E	4872 bytes
SHA-256: `676232785b9c33871a91649bbca70caa13ee714fa8f582c2f4d3aab46283f6c8`
`font_01_sfnt_off000107e4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x107E4	13480 bytes
SHA-256: `8462a4f628d2bc86b143361899affecaa3bf398cd9accb9dfc4cfe0242752902`
`font_02_sfnt_off0001316d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1316D	16292 bytes
SHA-256: `34ad98d3d78c265647d5c190a40388f7d9f4793b2e5e818bf5ae4ff4a360d054`

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