PDF malware analysis — malicious · b2c1a3e8802b1d0d

MALICIOUS

PDF

74.0 KB Created: 2021-04-01 04:29:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23

MD5: d05a471f9c35d65a953c21f01e368af6 SHA-1: 71a4eb662029d84085613f72a91a89adbbda4e47 SHA-256: b2c1a3e8802b1d0d3098b890ecff88fd7dfa2c9f568a4e302d985a1c72253026

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 0.9998

Heuristics 5

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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://fokemale.ru/award?keyword=argumentation+and+debate+freeley+steinberg+pdf PDF link annotation
- https://leneguvajetuse.weebly.com/uploads/1/3/1/3/131380977/d455d4d1.pdfIn PDF document text
- http://beririka.scienceontheweb.net/89228645781.pdfIn PDF document text
- http://pixujuxe.mypressonline.com/breville_barista_express_manual_coffee_machine.pdfIn PDF document text
- https://rawoxozuk.weebly.com/uploads/1/3/2/6/132695352/2daca.pdfIn PDF document text
- https://basitonivi.weebly.com/uploads/1/3/4/5/134584834/diroxesoriti-jemusovelar-raraduw-pijewa.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/914ccad2-7612-4576-9577-805ff5dcdbc1/pete_the_cat_and_his_white_shoes_coloring_page.pdfIn PDF document text
- https://s3.amazonaws.com/kibavutibeved/final_fantasy_7_remake_walkthrough_guide_book.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/1e08a180-2341-4359-b00c-4aa92f58fe3c/30594309441.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/8f63188a-3f63-4663-9eb6-43a0de3d6e58/how_to_study_your_bible.pdfIn PDF document text
- https://s3.amazonaws.com/zijivevip/blank_political_map_of_india.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/36372b76-3be8-4b5b-8712-029f04329b09/55553731353.pdfIn PDF document text
- https://s3.amazonaws.com/kavifunaruvi/ziwosul.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/5d771b82-cc35-4073-9383-15d265dccc41/78758720118.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/40cfd010-c5f8-42c3-a194-cf941f2cbe36/90405062295.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/4defd2ec-bf15-4d05-8682-ba3ff324803f/gibojuvagome.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/1a143907-fb25-410e-a8b9-d9671ef57d5e/vumelu.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/8007ab06-c842-46a6-9a43-28e061fe2329/what_was_the_3_main_causes_of_the_french_revolution.pdfIn PDF document text
- https://s3.amazonaws.com/guwutivupudutu/11449894722.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/d4e743e1-b275-4046-b619-cc677f34e3f3/fubaxovomujenado.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_off0000d000.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD000	5592 bytes
SHA-256: `7879300a140d1553bd074f30967f1c58c1d12ad9ca214d5123b24e2a2df8604c`
`font_01_sfnt_off0000e2f3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE2F3	9928 bytes
SHA-256: `766ca24332f14cfe573e0968226ebf6d4a91c11dcb0172272d96e37d8c0e5aec`
`font_02_sfnt_off00010539.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10539	16084 bytes
SHA-256: `29b8095464fa9501f2379a4c43ca3ba1b1df604f87f2abcbe11fa9bdafb8ec10`

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