PDF malware analysis — malicious · d756fd856561a88c

MALICIOUS

PDF

81.7 KB Created: 2021-03-19 18:19:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02

MD5: 0132113fa32f41dad628a507d02ee211 SHA-1: 5b3a094b696ba0a423b770c42f3e7a13398e2000 SHA-256: d756fd856561a88cf56f5d8822a8c4687295445e843169238449883b8715f49a

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous external links, with a primary focus on a URL that appears to be part of an SEO-based link farm. This suggests the document is designed to drive traffic to malicious or compromised websites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

Nyx PDF Classifier malicious score 0.9995

Heuristics 5

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 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.
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/wix?keyword=vocabulary+workshop+level+f+unit+6+answers+choosing+the+right+word PDF link annotation
- https://cdn-cms.f-static.net/uploads/4421788/normal_604fa928ec601.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4379736/normal_5fe1d227cd352.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4458413/normal_60356b94999c5.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4414161/normal_5fe404cb77822.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4454184/normal_5fcf13af975e8.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4374852/normal_5fd66518d018c.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4378605/normal_5ffc9be369410.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4496014/normal_600825e15d4a3.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4420034/normal_5fdc32ac369b8.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4448137/normal_603feb677f60b.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/29c78e47-9883-4931-b2a4-51ae319f8bc5/sodastream_fizzi_one_touch_glass_bottles.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/9a2ab427-991b-4efc-a066-69513c56c169/povosekuwi.pdfIn PDF document text
- https://5b949be5-44ef-49af-96c7-0ebaa8fe632e.filesusr.com/ugd/3402b1_c1a3f43d05a541a89d54f8524c314399.pdf?index=trueIn PDF document text
- https://91e55214-10ad-44cf-a10a-60a9392df58b.filesusr.com/ugd/e1c37d_f24874897ae74a3a8248b69c5be11828.pdf?index=trueIn PDF document text
- https://uploads.strikinglycdn.com/files/8466c951-ef99-423b-8d7d-46942491028a/nunifuxekamugekejusojiv.pdfIn PDF document text
- https://9e705916-5bde-4eb8-be9b-8b3e910fbaf8.filesusr.com/ugd/c7a620_e90127d79ede4e23872a8610adc55eb3.pdf?index=trueIn PDF document text
- https://uploads.strikinglycdn.com/files/0f4bb4ec-093e-422b-9310-69b0c29f9197/26390671877.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/1457a3f2-ef9a-4683-9223-542d55f26609/39906176190.pdfIn PDF document text
- https://42cc6f6d-9125-48bc-bce4-1bf15f49b1be.filesusr.com/ugd/7c30af_82505107632e4a9fb719f9cf8cdd1925.pdf?index=trueIn PDF document text
- https://uploads.strikinglycdn.com/files/cc90d0cf-a5ff-4de3-b2b5-debd63b227b3/39621419170.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/2a90a6dc-71b8-4d29-b4de-f1ac7b2926f3/37108162804.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/a9ac74a9-9cbe-4106-afa3-b920e3e1a763/guitar_theory_for_dummies_review.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_off0000f0da.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF0DA	5876 bytes
SHA-256: `062bd3a569cdef2600071e8fce9c5a616f7915feeee15a430e415af9c84cec21`
`font_01_sfnt_off000104e3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x104E3	11244 bytes
SHA-256: `270fe2aba03eb95ff82118d3a44b8e954ec14efae014ef18ebfc9cb8ec3a5427`
`font_02_sfnt_off00012b1d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12B1D	4324 bytes
SHA-256: `ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230`

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