PDF malware analysis — malicious · 5235bc245498826c

MALICIOUS

PDF

73.1 KB Created: 2021-03-16 06:20:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23

MD5: 3070af33d2b3a9f6f0907cabd8350669 SHA-1: 593653b5739564629f5b9ef8c828d0bc51239555 SHA-256: 5235bc245498826cf183eb9b96d64f98a31d7182c4e0db94e6553ee1292de597

236 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses brand-impersonation credential phishing and a callback-phone (TOAD) lure. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

Nyx PDF Classifier malicious score 0.9997

Heuristics 7

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.
Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH

Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://duxegolukazokun.weebly.com/uploads/1/3/1/3/131398215/jakuxaves.pdf.
Callback phishing phone lure medium SE_CALLBACK_LURE

Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
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://vilenefex.ru/award?keyword=tutorial+carding+amazon+pdf PDF link annotation
- https://duxegolukazokun.weebly.com/uploads/1/3/1/3/131398215/jakuxaves.pdfIn PDF document text
- https://gapudozesaneg.weebly.com/uploads/1/3/4/5/134525911/ragod.pdfIn PDF document text
- https://puvawenoma.weebly.com/uploads/1/3/3/9/133999826/xajarujuwatibos.pdfIn PDF document text
- https://duxegolukazokun.weebly.com/uploads/1/3/1/3/131398215/fuziwapujezike.pdfIn PDF document text
- https://jesasifewom.weebly.com/uploads/1/3/1/4/131453969/2308812.pdfIn PDF document text
- https://tapelurefufud.weebly.com/uploads/1/3/5/3/135316676/8569161.pdfIn PDF document text
- https://vufoduvetuf.weebly.com/uploads/1/3/5/3/135302170/xogurovofulus-wukusebofunot-legofode-pojuna.pdfIn PDF document text
- https://xawizavikerid.weebly.com/uploads/1/3/4/5/134525990/buxepasozarag-letavema-lumuduzinenubo.pdfIn PDF document text
- https://pimoraruwozego.weebly.com/uploads/1/3/2/7/132712303/xodozokebazubufodif.pdfIn PDF document text
- https://vufufibujirefe.weebly.com/uploads/1/3/4/3/134355905/54e89229a0.pdfIn PDF document text
- http://tefuvawilutir.mypressonline.com/worejetawojafita.pdfIn PDF document text
- https://nusutaligufobam.weebly.com/uploads/1/3/5/3/135393176/xezateniwulom-ganuwivonemisaf-doparaweloz.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://s3.amazonaws.com/jiwotarotavuz/57575574786.pdfIn PDF document text
- https://s3.amazonaws.com/lanaladu/58207166306.pdfIn PDF document text
- https://s3.amazonaws.com/baposivarabuj/lucknow_building_bye_laws_in_english.pdfIn PDF document text
- https://s3.amazonaws.com/xijilesuzuxo/gsk_consumer_healthcare_annual_report_2018.pdfIn PDF document text
- https://s3.amazonaws.com/vanatul/jekaz.pdfIn PDF document text
- http://moxuzaridob.onlinewebshop.net/vecteur_directeur_et_vecteur_normal.pdfIn PDF document text
- https://s3.amazonaws.com/jutenojamega/fortigate_3600e_datasheet.pdfIn PDF document text
- https://s3.amazonaws.com/sukedil/88879915103.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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000dfc4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDFC4	5296 bytes
SHA-256: `40060eb38f7ae1d14860b2eccda443ff35db083b31c7074a37d1b707689ec4d5`
`font_01_sfnt_off0000f1ba.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF1BA	11136 bytes
SHA-256: `51d628172c572c99f7da992435f02bed71681d2423ef709f394448a49738caf4`

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