PDF malware analysis — malicious · a5a5daeb18f566fb

MALICIOUS

PDF

82.3 KB Created: 2021-06-13 10:02:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25

MD5: f15df506321a5800ba9a5e0b6819c845 SHA-1: 33d80ff0e57e8b8929a89aa9e491da519452a4bb SHA-256: a5a5daeb18f566fb90690aa6abf02601e301a9cac06895ce8602fe2318297374

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous external links, a common tactic for SEO link farms and phishing campaigns. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as a phishing trojan. While no scripts were directly extracted, the PDF structure and embedded URIs suggest an attempt to redirect users to malicious websites, likely for further exploitation or credential harvesting.

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 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://medvor.ru/pbw?utm_term=atwood+rv+stove+manual PDF link annotation
- https://dekepopepafeg.weebly.com/uploads/1/3/5/3/135313768/begarosiguledu.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4498345/normal_5fd2f8ecbfd87.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4374369/normal_6033d07d7e9b8.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4426271/normal_6066fe8e27e60.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4470985/normal_601002f57a288.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4501374/normal_60634f906b0af.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4428329/normal_6052700c7cfe2.pdfIn PDF document text
- https://bipesulevawitod.weebly.com/uploads/1/3/1/4/131437914/jabifiseloki_buzedafuzil_folivabiwewig_sukuvamugeka.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4372737/normal_60c2bedd1bc00.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4471996/normal_60392820cb8c4.pdfIn PDF document text
- https://xewidepomizexas.weebly.com/uploads/1/3/0/7/130775014/1ce2e2b.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://uploads.strikinglycdn.com/files/019028c1-586f-423c-b721-947dcdf0c082/excuse_letter_for_school_absence_family_vacation_sample.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/3107760d-5552-42f8-bb19-a3f912649081/example_of_critical_thinking_activities.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/5edbbe62-ca19-4b2a-a1d3-bdad8ccaf8c2/odd_thomas_pelicula_online_espaol_latino.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/e401e273-5690-407a-85f9-89edc74abbae/lagepopivogi.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/56797760-0e82-4cff-89c1-630ee02decad/jasiwegokelogof.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/b5abaeb3-649b-462a-bb44-2ad3d29d4a6c/ford_mustang_mach_1_for_sale_craigslist.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/53889170-927b-49a7-8bf3-5d1a00dc3c66/loboziwopijadi.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/3257fd34-ff96-43f3-b9d2-2dedd16c0036/tipowopisisekozev.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/6e473334-1694-4006-8d1e-7d50261f81c7/2012_hyundai_sonata_limited_owners_manual.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/c9a0863a-fee0-4ad2-990f-608a17186cc3/pilgrims_progress_chapter_18_summary.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
- http://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000f139.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF139	5112 bytes
SHA-256: `0f222616773fb2bbdafde154715fce7b5560802570165aa47fbfd45bd234febd`
`font_01_sfnt_off00010297.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10297	10604 bytes
SHA-256: `dd3fe7e44b76160815d0690c98c58b59e7be942f4f37404ab72df5bdd508c289`
`font_02_sfnt_off000126fb.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x126FB	16060 bytes
SHA-256: `a808a2bda9a9b8ac20924ca86ba68b9151b7ccb5b4ec3beb2a872aa8c8d18b27`

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