PDF malware analysis — malicious · bc55ee2fb41fac2d

MALICIOUS

PDF

82.2 KB Created: 2021-04-04 09:18:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24

MD5: f09c53061096b279c50ac68012978ac1 SHA-1: 56924b49c709b06715e33fb3e827c9c73a7d5b56 SHA-256: bc55ee2fb41fac2de303ce93f092ed424608a1a00e40522df9868928f9db8c0e

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 0.9990

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 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://nipisod.ru/strik?utm_term=acorn+stairlift+engineers PDF link annotation
- https://cdn-cms.f-static.net/uploads/4445754/normal_6041d8420670f.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4500183/normal_60038824a77b4.pdfIn PDF document text
- http://present-mag.ru/7983921691849yxz.pdfIn PDF document text
- https://cdn.sqhk.co/vagofedewat/jjAushg/43598553108.pdfIn PDF document text
- http://axecheat7.xyz/didadazisavud8fqtw.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4418993/normal_602f3d9693eb5.pdfIn PDF document text
- http://vexidizagopukib.22web.org/graduate_mechanical_engineering_jobs_in_perth_australia.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4489414/normal_603a70a9e066c.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4416136/normal_606722ab2f8e7.pdfIn PDF document text
- https://cdn.sqhk.co/bigulikexupa/ehhgeia/89500086895.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4375339/normal_5ff098da9e4ca.pdfIn PDF document text
- http://tefukuk.iblogger.org/panofavudukazexizoj.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4492246/normal_60214d3fc010c.pdfIn PDF document text
- https://cdn.sqhk.co/jifigetuxu/dZHVjc6/52448612969.pdfIn PDF document text
- https://cdn.sqhk.co/kivuwutu/gvsnifP/f_s_letter_whatsapp_status_video.pdfIn PDF document text
- http://waxinexedodupij.22web.org/9th_tamil_guide.pdfIn PDF document text
- http://freshka.fun/logixivuzozodedunegidixifgyar.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4403938/normal_5fe1054e68697.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4370055/normal_601d0730bb49d.pdfIn PDF document text
- https://cdn.sqhk.co/wemitupu/tidiiGu/doximabodovizixeji.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://www.daltonmaag.com/In PDF document text
- http://binutovunisiriv.rf.gd/mackie_profx8v2_8-channel_professional_effects_mixer.pdfIn PDF document text
- http://rakojumetaxo.epizy.com/difference_between_gate_valve_and_globe_valve.pdfIn PDF document text
- http://viwivebobip.epizy.com/mabudenujen.pdfIn PDF document text
- http://jovurafop.epizy.com/gogusogujopuzomukozaz.pdfIn PDF document text
- http://woxutonugosafer.epizy.com/does_shark_vacuum_have_a_warranty.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_off0000f670.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF670	4824 bytes
SHA-256: `4fb209238fbb2612569ce041ec2494f359c2b7899a2ef8344495fb174fa329e2`
`font_01_sfnt_off000106d7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x106D7	11284 bytes
SHA-256: `3588e7c7a7847e7ff9d5269074064cd55df02c5be070a14c81c48ef7b0b5422b`
`font_02_sfnt_off00012d58.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12D58	4324 bytes
SHA-256: `0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333`

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