PDF malware analysis — malicious · cb995516462c2ca1

MALICIOUS

PDF

79.7 KB Created: 2021-04-01 08:54:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 282e6f3d1b8c4c4a8e59d88638251146 SHA-1: 751ad7c030aaa2e4fd5193e294419a702d0f9061 SHA-256: cb995516462c2ca165f787d7a6a67eb894c1694b9333b1af536c29e3d25a083b

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link farm designed to mimic search results, directing users to a malicious URL. The ML classifier strongly indicated maliciousness, and the presence of numerous external links suggests an attempt to drive traffic to potentially harmful sites. No scripts were extracted, but the PDF structure itself is used for malicious redirection.

Machine Learning

Nyx PDF Classifier malicious score 0.9991

Heuristics 4

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://mezovuduw.ru/wix?keyword=fieldpiece+sman+4+manual
- https://cdn.sqhk.co/kubepugemaki/ivA6TyL/27530930733.pdf
- https://cdn.sqhk.co/jovowosifo/gjibh9I/nadibupegax.pdf
- https://cdn.sqhk.co/karadirimose/j3oghyH/a_guide_to_young_economist.pdf
- https://cdn.sqhk.co/jesovolavig/iuhj3ie/64404486232.pdf
- https://cdn.sqhk.co/xenojepezere/gfhaihe/splendor_in_the_grass.pdf
- https://cdn.sqhk.co/forosobeg/Shaidgq/24832551339.pdf
- https://cdn.sqhk.co/jipogidara/NGYgfhb/defenders_of_the_realm_an_epic_war.pdf
- https://cdn.sqhk.co/levowexesu/dianOii/45730185601.pdf
- https://cdn.sqhk.co/dijowasedop/oAjjJeo/sofawepizegugezotoj.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- http://www.daltonmaag.com/
- https://2a07c75e-e898-48ba-b326-4cccc82d0599.filesusr.com/ugd/ff154e_80661a7b979d41d3af4d1e5fe42612f9.pdf?index=true
- https://37e0f79d-b0c1-4727-b76d-5b759c81288f.filesusr.com/ugd/9c66ff_323f4c7cbb404516867d6c50a8d3a3dd.pdf?index=true
- https://s3.amazonaws.com/tajimipojimo/tuxavaxiz.pdf
- https://f8206d31-21c4-4aef-9da9-e4259ded718a.filesusr.com/ugd/c2bdac_d454305d13df46ea9b42002ae7999af6.pdf?index=true
- https://d427386d-3434-45d9-8802-370857a594f4.filesusr.com/ugd/accd1f_841e8f1298bf4ec0a01a535f9b6a4a56.pdf?index=true
- https://4647adb0-9c01-46a1-aef1-4380d5873f13.filesusr.com/ugd/edb4a7_040645a0eb754932a57d94d5969c2a3b.pdf?index=true
- https://ce2645ba-e89a-43d5-afff-5c0150757291.filesusr.com/ugd/c63dba_3d89cf8fec4f481fae2e28217667087e.pdf?index=true
- https://e0220c8c-c322-4c33-af83-7c5b0fe00b66.filesusr.com/ugd/a771bd_451d635ad9174948acabd708b3f1c534.pdf?index=true
- https://3f740848-0e57-4b51-8596-564812021bec.filesusr.com/ugd/cbe17c_02587dac8cc44286aebd0203c6dcbcfc.pdf?index=true
- https://a4346b84-4611-49ab-b113-80c9188ca613.filesusr.com/ugd/078c79_d4a0902cd51f4a34995ad5660871b014.pdf?index=true
- https://s3.amazonaws.com/sowirutelevolur/55526036616.pdf
- https://76df98a8-3e94-4eee-a6f5-23e1de06049b.filesusr.com/ugd/54c74c_d93fd9617d3b4dc2beaf9851c5e2f410.pdf?index=true
- https://4bd9ed84-c80b-4837-bb2f-b1353ebfd8aa.filesusr.com/ugd/5a1791_1aef44610ede4df0bb42a5d8c53326a0.pdf?index=true
- https://s3.amazonaws.com/kudufigunabi/how_to_plot_data_in_excel_graph.pdf
- http://www.w3.org/1999/02/22-rdf-syntax-ns#
- http://purl.org/dc/elements/1.1/
- http://ns.adobe.com/pdf/1.3/
- http://ns.adobe.com/xap/1.0/
- http://ns.adobe.com/xap/1.0/mm/
- http://ns.adobe.com/xap/1.0/rights/
- http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000ee06.bin` `126d6b8926dcc5ff572b251fcb015ddfc399aafa6fb775cded26c35e4e31cbef`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEE06	4856 bytes
`font_01_sfnt_off0000fe69.bin` `fe9f6336d2fdf2f4c2a03a68ef67ec76677b3282a5b969e6997a2e290b0fffbb`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFE69	10668 bytes
`font_02_sfnt_off00012297.bin` `1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12297	4324 bytes

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