PDF malware analysis — malicious · 9402d676dea1877e

MALICIOUS

PDF

88.0 KB Created: 2021-03-30 02:24:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23

MD5: 853e369a26f0026ef5c44c477d704aa8 SHA-1: de23386fbdd12c6f074fc2cb298d69b45b12f3f7 SHA-256: 9402d676dea1877eea9d546859d4398114b4ce1a626e6969ee57017dfe0ce77e

194 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 0.9996

Heuristics 7

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.
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://seumenha.ru/wix?keyword=download+fouad+whatsapp+latest+version+apk PDF link annotation
- https://cdn-cms.f-static.net/uploads/4481527/normal_604e6d312648a.pdfIn PDF document text
- https://sugogovofel.weebly.com/uploads/1/3/1/0/131069978/d72782.pdfIn PDF document text
- https://cdn.sqhk.co/resilano/hLaja5O/71156615133.pdfIn PDF document text
- https://rejasujewefem.weebly.com/uploads/1/3/0/7/130738882/rujamidasipunawani.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4403533/normal_5fe10e03eee1d.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4488837/normal_5ff57fe25bc9f.pdfIn PDF document text
- https://cdn.sqhk.co/bomemenun/haFGgff/strategy_war_games_online_unblocked.pdfIn PDF document text
- http://tulidefupevewub.iblogger.org/accord_de_paris_climat.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://uploads.strikinglycdn.com/files/f4e34b2a-8bfb-4814-9827-ba81019c5480/graduate_software_tester_interview_questions.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/8c4290a8-69ec-4769-86f1-15efd9ba3ec0/banamuzaxosumu.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/b929bcd4-0813-4b40-bc6d-2825153c021c/86643811387.pdfIn PDF document text
- http://malenezi.epizy.com/dkm_sheet_metal_company_limited.pdfIn PDF document text
- http://dikewovob.epizy.com/zimuduv.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/cad82539-cf2b-46b2-83f2-60229917a2d2/kobudunibelezabera.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/1b418191-823a-4821-81b4-31d88914844d/how_do_you_describe_tone_of_voice.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
- 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_off0000fc13.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFC13	5344 bytes
SHA-256: `000602943fb49058fac74a025510e2e04035f17a23d8105018b33b17e2269706`
`font_01_sfnt_off00010e50.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10E50	2012 bytes
SHA-256: `c744a51b48d596f672cd233ead2463e7bb698a55b355cdb5fdf8ef887681b55c`
`font_02_sfnt_off00011786.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11786	10964 bytes
SHA-256: `6182fcad7bfcecc07431448e62a718a9d5da03becf5975a29a810ae589e256d6`
`font_03_sfnt_off00013d03.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13D03	16080 bytes
SHA-256: `de63b85c4bdb7cd2b5663481cd533f478db8bc63729ff441ecd36701c79a44ea`

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