PDF malware analysis — malicious · 305732a9afd2b983

MALICIOUS

PDF

66.4 KB Created: 2020-12-17 21:53:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07

MD5: 322a3cb5b0cf24176b75e5c40ad38e8f SHA-1: 4123ac7134fe446d083f6e3e10fadd6fc6f94ff9 SHA-256: 305732a9afd2b9832dc7c4482e559ad89fedef95364cb905bd90af48006fa4f9

274 Risk Score

Malware Insights

MITRE ATT&CK

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

The PDF contains multiple heuristics indicating malicious intent, including a critical finding for a brand-impersonation credential phishing lure impersonating Microsoft. It also links to known malicious redirector infrastructure and hosts a large number of external PDF links, suggesting a link farm or SEO poisoning attempt. The embedded URLs and the nature of the heuristics strongly suggest this document is designed to trick users into visiting malicious sites, likely for phishing or malware distribution.

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
PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK

PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
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://xusawoji.weebly.com/uploads/1/3/0/7/130739635/29bd6b607bd1.pdf.
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://traffking.ru/aws?utm_term=brothers+in+arms+3+cheat+tool+apk In PDF document text
- https://cdn-cms.f-static.net/uploads/4403120/normal_5fd61b39a73b9.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4479445/normal_5fd6e0a6c0ac3.pdfIn PDF document text
- https://xusawoji.weebly.com/uploads/1/3/0/7/130739635/29bd6b607bd1.pdfIn PDF document text
- https://lurevovikofa.weebly.com/uploads/1/3/4/6/134693735/lageropeperebetifad.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4428069/normal_5faee4f464a88.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4411483/normal_5f9c0eb101c60.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4450043/normal_5fc155313752d.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4391909/normal_5fc13692e0fc5.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://static1.squarespace.com/static/5fc0d446ab79f442f2293e00/t/5fc14b7f1972c46e3cce878d/1606503298555/snapchat_dog_filter_meme.pdfIn PDF document text
- https://static1.squarespace.com/static/5fc57b2d6609fd0ee7b07d3c/t/5fc5f68bcb3e0f57711d2a71/1606809227753/dino_hunter_apk_revdl.pdfIn PDF document text
- https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe274d4f98375720a9d565/1606297422628/creepy_phone_numbers_that_call_you_back.pdfIn PDF document text
- https://s3.amazonaws.com/bokofapig/fram_oil_filter_cross_reference_atv.pdfIn PDF document text
- https://s3.amazonaws.com/muvazi/second_grade_language_arts_worksheets.pdfIn PDF document text
- https://static1.squarespace.com/static/5fc2979f7848ba205d236332/t/5fc40ea3f3de5e49b5e376ab/1606684323913/2961820516.pdfIn PDF document text
- https://static1.squarespace.com/static/5fc5820ae9fc3622d5411e5f/t/5fc983bb55485c3109a7df56/1607041980136/38263778053.pdfIn PDF document text
- https://static1.squarespace.com/static/5fc54dfe3dfdd95b60f249af/t/5fd15710ce71ee580f9adf81/1607554833087/9809025163.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_off0000c442.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC442	5452 bytes
SHA-256: `253baabb68321cc8b81c38337d747bb5a864dfb421a46931f9362bb02ecd8cb3`
`font_01_sfnt_off0000d69d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD69D	11064 bytes
SHA-256: `6d11d1db229d2c178f3de9f0576723d0b3f2215888c9023086860d4b345ebfe4`

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