PDF malware analysis — malicious · 300ede37bd2baef8

MALICIOUS

PDF

80.5 KB Created: 2021-03-17 18:45:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20

MD5: 2d9f968974d6a71e4bb9a41cbd09fd2d SHA-1: b2df63a360f37a1a021693005d5f9646f8d60ff5 SHA-256: 300ede37bd2baef84c3ec5fc294c47e491ded1ec273aa109ebb45426373ee978

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous embedded URLs, many of which point to disposable hosting or redirectors, indicating a link farm designed to obscure the final malicious destination. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. The primary malicious URL identified is https://maypoin.ru/strik?utm_term=ventajas+de+los+motores+de+corriente+directa, which is likely used to host a phishing page or a second-stage payload.

Machine Learning

Nyx PDF Classifier malicious score 0.9996

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 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.
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://maypoin.ru/strik?utm_term=ventajas+de+los+motores+de+corriente+directa PDF link annotation
- https://cdn-cms.f-static.net/uploads/4393925/normal_5fd63361bbff7.pdfIn PDF document text
- https://cdn.sqhk.co/nukuzulu/vJihjhp/pavazemuferolop.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4495839/normal_604d682728433.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4498978/normal_5fc775b05c8cc.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4421464/normal_5fecadcb9a7c9.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4412894/normal_603000e3a013b.pdfIn PDF document text
- https://cdn.sqhk.co/ridasozewe/gfrKjhY/sorarefilirugidij.pdfIn PDF document text
- https://cdn.sqhk.co/gixezovof/jP2e1Vt/happiness_definition_synonyms_and_antonyms.pdfIn PDF document text
- http://vakiduweg.mygamesonline.org/pejodiwafozupizosaset.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4447662/normal_600e4ae48f9fa.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4403276/normal_5fe3b76d85d3c.pdfIn PDF document text
- https://cdn.sqhk.co/korokotuduki/5YihMuO/fitbit_charge_4_reviews_amazon.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://s3.amazonaws.com/sepovutapakogaf/strange_pet_names.pdfIn PDF document text
- https://s3.amazonaws.com/tapelu/lesson_plan_in_english_grade_6.pdfIn PDF document text
- http://petojijoxura.onlinewebshop.net/what_is_the_meaning_of_the_little_prince_story.pdfIn PDF document text
- http://zorijefugixor.atwebpages.com/difezufawubabuzodiniti.pdfIn PDF document text
- https://61df3396-90b5-4b69-a3ae-475c9da6ebc5.filesusr.com/ugd/516574_64ae54230c78461fb25a422e031e2421.pdf?index=trueIn PDF document text
- https://40fd9d30-e691-4ad4-9ff9-7de67b304886.filesusr.com/ugd/45b27a_37c1f052232944d39285538586c16425.pdf?index=trueIn PDF document text
- http://vawirir.atwebpages.com/jomugaputivukitilu.pdfIn PDF document text
- https://994180ce-385f-4272-9833-4a204a825e0f.filesusr.com/ugd/ec0c41_14384aee58c249519e4ac812f50b7687.pdf?index=trueIn PDF document text
- https://3f9320ff-391d-49df-b192-c557e211a93c.filesusr.com/ugd/469aea_a372fe2049744f799c0bdbce338da35a.pdf?index=trueIn 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_off0000f04c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF04C	4916 bytes
SHA-256: `0c23f1551299e426fbbdcc166e70f90fecc65a457a0b3580720a6cdf646ca12f`
`font_01_sfnt_off000100e3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x100E3	11368 bytes
SHA-256: `5c8378eb020c4bc514b0267e7d17168365494050c1c59e0a8a095b9a19050bf6`
`font_02_sfnt_off0001261a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1261A	4324 bytes
SHA-256: `cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34`

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