PDF malware analysis — malicious · ce1503231d66c63f

MALICIOUS

PDF

88.3 KB Created: 2021-05-29 06:11:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25

MD5: 18c5e6fafc3447c2f228ab2559681625 SHA-1: ebf2a003aebc9f7321d4fd736e990ad9cfc03c01 SHA-256: ce1503231d66c63fc610f05e9df6d818290fa6bc3da2d5b9964a35054d1fce65

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

Nyx PDF Classifier malicious score 0.9997

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://ponafet.ru/123?utm_term=spotify+music+free+mac PDF link annotation
- https://laxefepi.weebly.com/uploads/1/3/4/5/134528647/1653388.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4450512/normal_601bac96afcf2.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4502246/normal_5fced4d075615.pdfIn PDF document text
- https://padipemoton.weebly.com/uploads/1/3/0/7/130739419/9798383.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4425235/normal_5fe46402d5d8b.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4485005/normal_5fc93f1492e1f.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/65a503a1-61f0-4c02-807e-8bf4b2f14110/zagodenijilijoledun.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/28420631-121a-4eec-a6b3-7977563faa3d/62497548174.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/5642ed41-501b-4faf-ab91-4196093f1245/82379291864.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/2d7dad97-ae1f-420b-86c4-6e02640e7994/juxumebu.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/a0ec4333-3e2b-4779-8709-b3d5ddcf0c59/13672453752.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/df0c063a-cf4f-464b-8d0e-f4efd47b3c68/write_an_inequality_in_slope_intercept_form_calculator.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/ed1c3441-a3cd-4fb5-9339-3515d76864e3/is_a_lawn_care_business_profitable.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/1081724e-a9ea-4bf6-942e-7721dfd9e91e/wisogeputarukimujuzinijul.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/c5ef189c-6b7a-45b6-916a-75a9ce6d32bd/80641419793.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/df5a318b-3af2-45d2-ac17-425803df52f0/crossfit_training_program.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/8146e12d-0cbd-4dd5-b5a4-1e07b0367b69/piwobotipifedekadu.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/a425a8e4-c3bf-46d7-a326-ea1c473e9cd2/what_is_multilevel_inheritance_explain_with_example.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/50b0aca7-d350-4c06-83a1-8271fccb546d/94758396178.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/18e2fda8-34e4-44c6-87c7-41afba38136d/how_much_does_a_costa_coffee_machine_cost.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_off00010cc0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10CC0	5112 bytes
SHA-256: `4a85400135137b68749a427aa0086f86b29dfb0ec4eaad444356edabe28bf055`
`font_01_sfnt_off00011e29.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11E29	11364 bytes
SHA-256: `87359239fa9eee2cd97d0045fa5738f62a69ab538245f8f03667b345c5f2705a`
`font_02_sfnt_off000144ad.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x144AD	4324 bytes
SHA-256: `a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f`

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