PDF malware analysis — malicious · b214299ed9052566

MALICIOUS

PDF

78.8 KB Created: 2020-11-25 21:24:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04

MD5: 5e71da4053214f7e40b0da58c34246cf SHA-1: 1011d47780bab05120ed3cdaa60975af36d04393 SHA-256: b214299ed9052566899b42fd9c451cb874f67f012c415aeb3cd2d9808dfb7314

194 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 and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

Nyx PDF Classifier malicious score 0.9996

Heuristics 7

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.
Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM

Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON

Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
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://trafftec.ru/123?utm_term=inside+out+free+online+full+movie PDF link annotation
- https://lurufimuzid.weebly.com/uploads/1/3/4/0/134042860/runalefiwuti.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4380226/normal_5fa7110b27cee.pdfIn PDF document text
- https://gezeteweni.weebly.com/uploads/1/3/4/0/134040803/7eb37b09805.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4366965/normal_5f873c6289c35.pdfIn PDF document text
- https://tunugezujemis.weebly.com/uploads/1/3/4/3/134307821/lubunoxejaluba.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4367297/normal_5f8d7e4e7f9a3.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4378834/normal_5f9d5276359e1.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4474722/normal_5fb96db8d633f.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4482645/normal_5fb5a9c22e7a2.pdfIn PDF document text
- https://lobevebuwavija.weebly.com/uploads/1/3/4/3/134394718/51cc72744.pdfIn PDF document text
- https://tewodoxes.weebly.com/uploads/1/3/4/3/134368692/texanufizikegeb.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://s3.amazonaws.com/pusori/worlds_easyest_game_answers.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/11ebcb47-8cea-43d4-8c2e-285ab0d53080/fojusivopanabipexipesogo.pdfIn PDF document text
- https://s3.amazonaws.com/zufojadibi/nekazutukiwotili.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/eb2f3d2d-f966-4b4b-84d6-9076ff15b826/answers_about_the_afterlife_bob_olson.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
- https://savannah.gnu.org/projects/freefont/In PDF document text
- http://www.gnu.org/licenses/In PDF document text
- http://www.gnu.org/copyleft/gpl.htmlIn 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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000c6c1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC6C1	6588 bytes
SHA-256: `c6acebe3750ab55c09714fa1b34f6c70ddae3ce202e1a088ffcbc34adab53285`
`font_01_sfnt_off0000d73b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD73B	4840 bytes
SHA-256: `f1ddaf5222c38bf8e718e3f529fa311870448338bf9acbaeb4e0d91923698a29`
`font_02_sfnt_off0000e7a2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE7A2	15172 bytes
SHA-256: `0837ea8f59bab9e4b366d1fd2e87177f83e6a4114cdbd43897a6b29f7400a43f`
`font_03_sfnt_off000117f3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x117F3	16304 bytes
SHA-256: `334a632046566dba1e13aa2ad28522ffc4701ff005b1d667d8ded0e84145bcf3`

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