PDF malware analysis — malicious · 9f5aeea53241a997

MALICIOUS

PDF

77.6 KB Created: 2021-03-04 20:09:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20

MD5: 8870413652f488a54c513cc4ce38f9c0 SHA-1: da47d1902f31e52b97d28d37ea91863ce8294cc8 SHA-256: 9f5aeea53241a997e27a45f7ecc0947103a31174762e167b90f737e72059a5fc

214 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file contains a large number of embedded links, with at least one pointing to known malicious redirector infrastructure. The heuristic firings indicate it is a malicious redirector and part of a link farm, suggesting a phishing or malware distribution campaign. No scripts were extracted, but the primary attack vector appears to be the embedded links designed to lead users to malicious sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9993

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
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.
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://yafferge.ru/strik?utm_term=hp+elitebook+2570p+i5+release+date In PDF document text
- http://womans30planet.com/subaru_marketing_strategyybtju.pdfIn PDF document text
- http://vknacruckalaikov123.xyz/736799054011bavs.pdfIn PDF document text
- http://montana-media.com/los_hijos_de_sanchez_vicente_leerozugyw.pdfIn PDF document text
- http://dupuladusudired.mypressonline.com/wuwuwip.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://litorow.myartsonline.com/46974766396.pdfIn PDF document text
- http://jujobope.atwebpages.com/how_to_edit_a_background_of_a_picture_on_iphone.pdfIn PDF document text
- https://s3.amazonaws.com/kopisigapub/6278029032.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/1cf7b879-3d58-40a9-a64c-fb479299350d/leluwev.pdfIn PDF document text
- https://e1eccfe9-8888-4f52-a155-e9c8e84e0752.filesusr.com/ugd/4fb05f_2d855b409b4647b1a957ccb7b8bf7708.pdf?index=trueIn PDF document text
- https://uploads.strikinglycdn.com/files/71cbd341-afc1-45cc-929e-da81756109aa/what_are_the_5_major_rivers_in_arkansas.pdfIn PDF document text
- https://650c977b-0274-48a2-8498-43c0efc39f4e.filesusr.com/ugd/dbad32_d047dee598754ad9a6a1f31d4bb55df9.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/voropa/garaputiduweretonigonuwik.pdfIn PDF document text
- https://d9226533-59f4-4737-ae77-cfa9cdee5378.filesusr.com/ugd/d7c203_0330fcc9645845fdb579129ad318a25d.pdf?index=trueIn PDF document text
- https://67dec473-0a9c-497c-80b1-62a4c84c5046.filesusr.com/ugd/0aab01_de5566cd19c1436f9cb3bb3cb9a025c4.pdf?index=trueIn PDF document text
- https://uploads.strikinglycdn.com/files/df8214e5-77b7-48ec-8720-ae74ac24b531/what_is_the_primary_purpose_of_traffic_laws.pdfIn PDF document text
- https://s3.amazonaws.com/julexekubaj/update_windows_8_to_10_free.pdfIn PDF document text
- https://s3.amazonaws.com/gazijewevan/acer_aspire_e_15_e5-576g-5762_price_in_nepal.pdfIn PDF document text
- https://s3.amazonaws.com/ladojenefe/kottaisamy_arumugam_gramiya_songs_free.pdfIn PDF document text
- https://s3.amazonaws.com/bomupi/pinzon_heavyweight_flannel_sheets.pdfIn PDF document text
- https://s3.amazonaws.com/lomuper/jsw_gi_sheet_dealers_in_chennai.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/622ab33a-ee85-40cd-aa37-d68990a50c75/pututuxalubelesoxa.pdfIn PDF document text
- https://d5aacb37-8766-4234-9cc8-c2ec3b911aba.filesusr.com/ugd/1e723b_bf3e65db831a4e76a20c3a35087e4ccd.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/vavapekadoliti/kinonuxofuzet.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_off0000f199.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF199	5596 bytes
SHA-256: `86036fc40eeb74ec6e78635a1845ad2cc28d8d75585550799957b0b1bdeba908`
`font_01_sfnt_off000104a8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x104A8	10712 bytes
SHA-256: `f9dcd19e35e9528fd9088869cf5c9c3eb062b70901e28ef11f0e709231ab0db9`

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