PDF malware analysis — malicious · 531bb3ec330b1627

MALICIOUS

PDF

70.9 KB Created: 2020-11-20 00:39:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17

MD5: 485717282820642ff69e5b6bcc183394 SHA-1: 0808464dc199080dabfdade216119aec26d5744a SHA-256: 531bb3ec330b162740d6083387a23f4434faec95a7055987ef1324f5e0ea7cf9

146 Risk Score

Malware Insights

MITRE ATT&CK

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

This PDF document is flagged as malicious by multiple heuristics and a machine learning classifier. It contains numerous external links, many hosted on disposable domains, suggesting it's part of a link farm designed to redirect users to malicious content. The 'SE_CALLBACK_LURE' heuristic indicates the document's content is designed to trick users into calling a phone number, a common tactic in callback phishing and tech-support scams. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest an attempt to exploit vulnerabilities or deliver a malicious payload.

Machine Learning

Nyx PDF Classifier malicious score 0.9998

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.
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://trafficel.ru/wb?keyword=airtel%20digital%20tv%20%20free PDF link annotation
- https://pesajupamobe.weebly.com/uploads/1/3/1/6/131607203/3030635.pdfIn PDF document text
- https://xetutinafo.weebly.com/uploads/1/3/0/7/130775845/c241ebe76af1.pdfIn PDF document text
- https://kupelaranix.weebly.com/uploads/1/3/4/7/134729830/foveguke_xolujapefared_setem.pdfIn PDF document text
- https://bivitomelonex.weebly.com/uploads/1/3/4/4/134491730/domubabeduso_kelunamadejizi.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4418796/normal_5f99f10356761.pdfIn PDF document text
- https://wufikasokuwomoz.weebly.com/uploads/1/3/4/3/134359410/xofikiwegawemaj_sovugina_jozenerim.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4369308/normal_5f893308d4516.pdfIn PDF document text
- https://dosaremuxabibi.weebly.com/uploads/1/3/0/7/130739916/5039425.pdfIn PDF document text
- https://vikumeniwexawud.weebly.com/uploads/1/3/0/9/130969440/rezukiwamid.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4404313/normal_5f992bea2930e.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
- https://uploads.strikinglycdn.com/files/c00a10e3-fe25-4d7d-967e-c7b1250c125f/34249489599.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/402f40f1-c10c-4231-b998-d3daf6af7f62/zunuw.pdfIn PDF document text
- https://s3.amazonaws.com/ligole/dejuxudinoguwenul.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/02665dc5-169f-4aa4-8666-64f0647fa302/dotozok.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/ff18bc05-1489-4c34-8b46-0ac7474d7251/firorafaxarilepotov.pdfIn PDF document text
- https://s3.amazonaws.com/mawesenasijoser/java_projects_for_students.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_off0000cae5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCAE5	4516 bytes
SHA-256: `72eead8771f4a3bc4c676578cf882a4084d8786b3d8f543c332fa1c6676b91e0`
`font_01_sfnt_off0000da51.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDA51	11272 bytes
SHA-256: `19bf70434d1f0a1f35589081d077db46af047941b15c117e2fc352950be0de3e`
`font_02_sfnt_off000100b2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x100B2	4324 bytes
SHA-256: `a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f`

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