PDF malware analysis — malicious · c39eb9ad901026f9

MALICIOUS

PDF

85.6 KB Created: 2021-03-19 22:43:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 76dd8a815ccc4796213ad635d46ac05d SHA-1: 90c761e2269a505b0a59156dbf24dde3467649ae SHA-256: c39eb9ad901026f9f088717dd01cf9abddde41e5a1328c78adb7567e30f832ab

246 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document exhibits characteristics of a payment redirection lure, aiming to trick users into altering payment details. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to obscure the ultimate destination. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or financial fraud.

Machine Learning

Nyx PDF Classifier malicious score 0.9997

Heuristics 8

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.
ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE

Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise 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.
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://zajinet.ru/wix?keyword=nusenda+near+me
- https://pedogore.weebly.com/uploads/1/3/2/8/132815008/temobotunun-fapubajibarag-xepixizagoritu.pdf
- http://fojukivijivik.medianewsonline.com/natarunisurumiriw.pdf
- https://gopelema.weebly.com/uploads/1/3/4/3/134314553/48f97b.pdf
- https://cdn-cms.f-static.net/uploads/4465123/normal_600e136f52054.pdf
- https://kufurana.weebly.com/uploads/1/3/1/4/131482954/0cf13812d44c5a.pdf
- http://zurujavurobe.scienceontheweb.net/adobe_photoshop_7._0_shortcut_keys_list_in_urdu.pdf
- https://dejutuzalusabi.weebly.com/uploads/1/3/4/8/134869317/3ff946b6.pdf
- https://bododomeliba.weebly.com/uploads/1/3/1/4/131408614/57be91242.pdf
- https://cdn-cms.f-static.net/uploads/4488103/normal_6035a897b2091.pdf
- https://cdn-cms.f-static.net/uploads/4414860/normal_6043105b3a330.pdf
- http://folugomobok.getenjoyment.net/fivozutefevoxujotapetefi.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://9301df3d-c689-496c-811c-0581e5fecd74.filesusr.com/ugd/f62067_fd4eb2c8c036491fbfe4192689383c28.pdf?index=true
- https://uploads.strikinglycdn.com/files/734feb7e-34c2-4d07-b843-fc739550cddb/20081201958.pdf
- http://ganatovofafad.rf.gd/arkestra_dj_bhojpuri.pdf
- https://uploads.strikinglycdn.com/files/0c220c31-cdb8-43a0-8348-29db25be3ca9/gamefisher_15_hp_parts.pdf
- https://ff9dba89-6132-4485-99c2-ace8a2453124.filesusr.com/ugd/c3f59f_8616a8ae4e6647aca2c364b6f5947097.pdf?index=true
- http://kosezofejesuxef.atwebpages.com/kumepumevibivuloxifarad.pdf
- http://nowavef.epizy.com/sample_application_letter_for_secondary_teacher.pdf
- https://237a2310-9536-43ad-add1-fe73b840a51a.filesusr.com/ugd/8b319d_775a21f071704522ba02eefb091caf33.pdf?index=true
- http://xukokumo.myartsonline.com/18058779849.pdf
- https://uploads.strikinglycdn.com/files/4187d8f0-467b-47cf-a0c6-71fe5297965f/wesakedijiperotu.pdf
- http://www.w3.org/1999/02/22-rdf-syntax-ns#
- http://purl.org/dc/elements/1.1/
- http://ns.adobe.com/pdf/1.3/
- http://ns.adobe.com/xap/1.0/
- http://ns.adobe.com/xap/1.0/mm/
- http://ns.adobe.com/xap/1.0/rights/
- http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00011147.bin` `602669e68880afd3af56f0a7a0d9545f1e553f9185f6dd85ea7d3b8d7800b291`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11147	4908 bytes
`font_01_sfnt_off000121de.bin` `754bef0767dd45a9a0fc492b31a74b6152ddc17c7282ba83507045841e742e7d`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x121DE	11292 bytes

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