PDF malware analysis — malicious · a20d38d3683bcd12

MALICIOUS

PDF

49.0 KB Created: 2020-10-17 06:24:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23

MD5: c78dfe22ca72aab480b621fe189bb3d4 SHA-1: 37da5e0f3a0f71ebd2bd8bb5e276753c6e4af5e9 SHA-256: a20d38d3683bcd125324479e8333b29553c6acc75c8e8582499643bb9e2c42a2

194 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious Link

The PDF contains a large number of embedded links, many pointing to suspicious domains and identified as a link farm. The document body, though heavily obfuscated, contains a URL that is also present in the heuristics as a malicious redirector. The 'SE_CLIPBOARD_COMMAND_LURE' heuristic suggests the document may also attempt to trick users into executing commands.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 5

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.
Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE

Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
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://cctraff.ru/strik?keyword=panasonic+th-50px75u+remote In PDF document text
- https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/kojurufilufopimob.pdfIn PDF document text
- https://mixorone.weebly.com/uploads/1/3/1/4/131438240/puzigikufazosi.pdfIn PDF document text
- https://folukufisika.weebly.com/uploads/1/3/1/3/131384255/3825337a46c2.pdfIn PDF document text
- https://jawowigo.weebly.com/uploads/1/3/0/7/130774982/2703260.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4370780/normal_5f89f94813ef8.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4366407/normal_5f8a1d478e12a.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4369514/normal_5f8a502f3998b.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/81719727-58b0-44bd-b8da-36f7b89986d9/jitijetofemubum.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/c843888b-2d3f-468d-9d30-5dc84db3cbfa/duzobewufunirejubape.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/16662b9d-d0fd-4d15-826f-b575686f0727/4658753313.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/bcafb98e-cb45-41d0-9379-6c9d7b6dc5d4/87772040174.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/425ee73b-ebd7-4bfb-9ba1-028fb287d6e6/12368021800.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/2178f7be-19d1-47f4-9be0-209e4e2079da/ring_doorbell_local_recording_hack.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/84a30b42-a670-430e-8a60-9ef733e37c24/midovubefawol.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/fc7f71f9-dba0-4ac2-b9de-ff8879af3421/2322822313.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/384a4638-433c-45fe-8acf-c0d948d16e39/gatikabusuxesebutijetupol.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0431/5663/5816/files/jabixexeri.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0497/5699/5745/files/torsion_bar_lift_dodge_ram_1500.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0266/8524/3581/files/big_giant_fish_pics.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0500/0042/9206/files/11013959367.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0266/9196/1017/files/the_blue_danube_waltz_sheet_music.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_off0000731b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x731B	5468 bytes
SHA-256: `cb769ccad6316548cdf341517c1312b7ee8ef9b73dd359444d9047456093c826`
`font_01_sfnt_off0000858b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x858B	10244 bytes
SHA-256: `f475e7ba0d0e2fd66512b46087a3d09311a24f6940a54de590e33ef9f582d527`
`font_02_sfnt_off0000a857.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xA857	4324 bytes
SHA-256: `cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34`

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