PDF malware analysis — malicious · 75765690c5c2bee1

MALICIOUS

PDF

85.2 KB Created: 2021-05-23 03:07:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25

MD5: d824491ba301cd0d4f2cbaed826ad729 SHA-1: 58f4b45996e588635c334c8d190494fffb07d21f SHA-256: 75765690c5c2bee1308345ceea8bb17810109ce8f5d1d609d51c4c6e850a9ef2

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF file contains multiple external links, with one specifically advertising a "War thunder free golden eagles generator". This link redirects through a Weebly hosted PDF, which is a known tactic for credential phishing. The ML classifier strongly indicated maliciousness, and the presence of a brand impersonation lure further supports this assessment.

Machine Learning

Nyx PDF Classifier malicious score 0.9996

Heuristics 5

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://bivesazi.weebly.com/uploads/1/3/4/6/134652180/860330.pdf.
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://ponafet.ru/strik?utm_term=war+thunder+free+golden+eagles+generator PDF link annotation
- https://bivesazi.weebly.com/uploads/1/3/4/6/134652180/860330.pdfIn PDF document text
- https://duloduwo.weebly.com/uploads/1/3/4/8/134850843/54feca3b871d.pdfIn PDF document text
- https://nirulutot.weebly.com/uploads/1/3/4/7/134700174/zujawomuwatunur.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4460477/normal_5ffd9a8209c61.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4454550/normal_60445be67a052.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4428033/normal_606773bfbf329.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4445871/normal_603a0da8c23b0.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4451033/normal_60245b4259675.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/27b5b7d0-c350-409c-a58f-34a29e7f3d70/ahsoka_novel_timeline.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/d1497999-6274-42c4-80fa-e0689b986967/how_long_do_you_leave_splat_bleach_on.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/d239c4ff-aa33-4a91-af0e-96fbb89b3b05/70107942521.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/475d8c84-09ac-457e-bb07-6d65f421ea0f/franz_kafka_quotes_meaning.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/63229efb-e3a2-4211-b4fb-eb58b487c6ea/is_there_a_truly_free_background_check_site.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/a1c7369d-2d0a-4ed4-8fe0-fa68b463f67d/40099855301.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/db6abb02-e45d-434a-8846-7756bcaf0ed8/mudulokumawe.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/5abe465c-672e-4143-a2fb-6ce6bd1b23d3/27225424151.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/66ab1bf6-7024-4676-9358-397797b8eb2e/zakikudinonur.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/cf04600e-c689-4d14-8189-f0f6c27348c9/51089654042.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/b8c89d59-0778-4103-ba71-b67c31abb447/30281189811.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/f06cd17c-5f82-41af-b6d5-08a457122ae4/sikepulaj.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/34177a38-eb34-4a4a-b5bf-f7290ecec792/gaxiwakeluluxulavatufepe.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_off0000fdce.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFDCE	5016 bytes
SHA-256: `f99b2f99b771316f48b5b00ce4120c45113ebcfa7705d80f6f8792d2f43af1a8`
`font_01_sfnt_off00010ee5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10EE5	11948 bytes
SHA-256: `58f93b770a143bf9c11cc7fd025dca0da2e3ff7f0aafdef62896cd27b4e53188`
`font_02_sfnt_off00013772.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13772	4324 bytes
SHA-256: `1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361`

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