PDF malware analysis — malicious · fef6637d01a4b164

MALICIOUS

PDF

86.4 KB Created: 2021-03-28 10:32:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23

MD5: 5f9239dba3d43b915303a11e65ae2f43 SHA-1: 53da54bc7314cb6fa30632da7a7b47c748989b1c SHA-256: fef6637d01a4b164c9d94f51c9f8bf67ddb7f8e533d40f0d7403cb6a7172470a

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 0.9985

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://golowaki.ru/wix?keyword=gamecube+wii+emulator+android PDF link annotation
- http://prostochillforum.fun/rasomonotafunurala6zhm1.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4367925/normal_605269370b0f1.pdfIn PDF document text
- http://form-lnstagramcopyrightservices.com/lit_term_examples6g6tv.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4503390/normal_60253d4b07434.pdfIn PDF document text
- http://lienforkid.com/57984765875nhjsj.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://d798de41-6847-46d1-b877-4f1b84f556ee.filesusr.com/ugd/3e315c_becd328f30d74a76bd31c7dbd27eca88.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/gewuwasi/toxexefipesugizodiwisev.pdfIn PDF document text
- https://b20aee1f-b1b7-4e4e-be5e-d884e4ece670.filesusr.com/ugd/10e3af_441d5159d43d4a34ac94de3eeba0e647.pdf?index=trueIn PDF document text
- https://237a2310-9536-43ad-add1-fe73b840a51a.filesusr.com/ugd/8b319d_136c537b7e1e47209971fcdcc8aa1342.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/mulerux/sig_p226_rx_legion_holster.pdfIn PDF document text
- https://7afcd0b8-98df-42a4-afe0-9544d44c9539.filesusr.com/ugd/74e9cf_d10107419e7f49bc9bf410371820bb0d.pdf?index=trueIn PDF document text
- https://2aa89031-56ac-4de1-b828-aabe99840ec8.filesusr.com/ugd/cf14a4_bf0c44dacefc4c458df739fadbe4cead.pdf?index=trueIn PDF document text
- https://0eaabcdb-938a-45a6-85a3-1a7d796bbcdd.filesusr.com/ugd/8d6d25_09961ef682de4926aaca31bbbb152196.pdf?index=trueIn PDF document text
- https://153f2bed-3501-4ec5-9468-ed1987511f6d.filesusr.com/ugd/f67134_2cd5df2f389a4510868a659530c545a3.pdf?index=trueIn PDF document text
- https://a5fc3680-5c08-4cda-bd6c-abaa3bdf25bc.filesusr.com/ugd/ea5d7b_23bf76d5bb68430ba1b9271ee789b4e5.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/wumodukubaru/birmingham_tram_map.pdfIn PDF document text
- https://a21f0d7d-5fe0-4a99-a381-3b18266e0880.filesusr.com/ugd/6c313a_9b3d5f594c2149109e4885356d2bb906.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/befafuni/pilok.pdfIn PDF document text
- https://s3.amazonaws.com/tuxutedi/ritugatezasekaxurokomok.pdfIn PDF document text
- https://s3.amazonaws.com/musokejixami/dadedanubiwivaxezolera.pdfIn PDF document text
- https://s3.amazonaws.com/luborinizu/learn_python_interactive_reddit.pdfIn PDF document text
- https://s3.amazonaws.com/ladiwuzetawedi/circuit_training_workout_for_beginners.pdfIn PDF document text
- https://s3.amazonaws.com/rumezo/11107697478.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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000fca8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFCA8	3084 bytes
SHA-256: `58da981c6d06e748b03c61731097db5d063ff69025a6b64511f0ba081bdf4c2a`
`font_01_sfnt_off0001079e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1079E	5052 bytes
SHA-256: `85c73d381f459f4af1750c7fd8bfb9a3731bc604eb04e395415fd89d0775de27`
`font_02_sfnt_off000118bd.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x118BD	10860 bytes
SHA-256: `7f0fe6e5d7e3c0f2d52d14a61b86ed60bac4f88f7627ffcd35a351f5306d6ab7`
`font_03_sfnt_off00013d8d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13D8D	4324 bytes
SHA-256: `cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34`

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