PDF malware analysis — malicious · e7e50d12950b59f3

MALICIOUS

PDF

81.2 KB Created: 2021-04-16 03:46:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02

MD5: 047783346f23b981aa291f3f9ce509fd SHA-1: c7ae5b52d6a2b7edaaee5df124ffa5fe9ba14056 SHA-256: e7e50d12950b59f39ce083e1d395f706f4c4c76eaa013ab0099ac9d8fe6f43d8

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous external links, with one prominent URL pointing to a suspicious domain associated with a link farm. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect users to malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.9950

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://pelibifir.ru/strik?utm_term=rainbow+fish+children%2527s+book+pdf PDF link annotation
- 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://932aa67c-856a-4fda-9fc8-fe3f50d4acc2.filesusr.com/ugd/a25eee_b86864e2ea004ad496db55766dd414e6.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/zuguvoxoki/gerunakogilonodatesusozix.pdfIn PDF document text
- https://s3.amazonaws.com/jewizopukuni/napamewikoruxevor.pdfIn PDF document text
- https://s3.amazonaws.com/jinotugiwomo/baguronefonesitog.pdfIn PDF document text
- https://s3.amazonaws.com/sepawi/chloroform_nitric_acid.pdfIn PDF document text
- https://27158da8-170d-48ca-a528-b8ced62fe517.filesusr.com/ugd/9fc8c3_d55d64b92dad4f1f8b4db55f4126dc8f.pdf?index=trueIn PDF document text
- https://uploads.strikinglycdn.com/files/59e71a46-160f-4597-8cca-626f9f9a4e07/whirlpool_gas_range_burner_parts.pdfIn PDF document text
- https://f110cc6a-49d6-427c-9ab6-a3a4d323b004.filesusr.com/ugd/9e53d4_4adc03b693f845aab3644db121ab36e5.pdf?index=trueIn PDF document text
- https://uploads.strikinglycdn.com/files/abbdc813-12fc-4ad9-b23d-7745c70750df/3160269002.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/48c9bc53-e9bf-4d36-b374-2e7d0cc1211c/how_to_remove_stuck_staple_from_staple_gun.pdfIn PDF document text
- https://f856bbc4-01c8-45e4-8891-a53c5ee59fd0.filesusr.com/ugd/8e827e_528966f65d25409e8af635cee7aa70d2.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/gowupuzokowuxes/3625952238.pdfIn PDF document text
- https://s3.amazonaws.com/libeganot/60005613575.pdfIn PDF document text
- https://s3.amazonaws.com/ganubifirigevi/malaysia_map_drawing_template.pdfIn PDF document text
- https://b998fa74-583e-446a-a2a7-67f41460fdb2.filesusr.com/ugd/e081f8_43e43ac3d1da41989a0828c6d70ebbed.pdf?index=trueIn PDF document text
- https://18bc7be3-897e-46c1-a475-efc190d089bd.filesusr.com/ugd/62845f_a7c8ea04c27e4938a392c2968ec7f1fa.pdf?index=trueIn PDF document text
- https://8bbfbdb8-1895-4472-a1c6-9e834ce25a60.filesusr.com/ugd/7deb27_f178b971d34742d6b9e26804ecee6c12.pdf?index=trueIn PDF document text
- https://uploads.strikinglycdn.com/files/88f4dfee-949d-43aa-8df8-1f42ad4df7c4/glencoe_algebra_2_workbook_answer_key_chapter_4.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/2819a309-c579-41e2-a2a1-53c398489c8d/xedumonakude.pdfIn PDF document text
- https://e0220c8c-c322-4c33-af83-7c5b0fe00b66.filesusr.com/ugd/a771bd_9e222a3dd57c42f9bcdfef5d5b9e21cf.pdf?index=trueIn PDF document text
- https://71a0d42b-91d5-4e94-9338-ff69ca8a624b.filesusr.com/ugd/e5d5e5_74bf6d0e505140f0830fc2275795d57e.pdf?index=trueIn PDF document text
- https://b5c90759-dbf8-4ccd-b12d-e23c958527f9.filesusr.com/ugd/915a55_62d2ac1001494bc0981fe76a2639d869.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/baposivarabuj/1618979535.pdfIn PDF document text
- https://s3.amazonaws.com/kujapomib/esl_directions_worksheet.pdfIn PDF document text
- https://a16eeaf1-ab09-4fb7-bdbc-3ebfa24c279d.filesusr.com/ugd/03042f_7f9272e709de4828ab335fc94b46a1e0.pdf?index=trueIn PDF document text
- https://71fc3d66-43b2-4ae0-adc3-dfbcdf8b5360.filesusr.com/ugd/6605a0_63b2813920d14927950652d4f8724075.pdf?index=trueIn PDF document text
- https://3c45aaf8-24f3-4cde-9773-cf44a0a970d3.filesusr.com/ugd/ae7d54_389c07ded57c4e4bbde86336a3c3b37a.pdf?index=trueIn 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_off0000f0c4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF0C4	5288 bytes
SHA-256: `57e6feb729793c8574efeda74f407cb3504ebba817bf834dcc4b7604928e40ee`
`font_01_sfnt_off000102be.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x102BE	11196 bytes
SHA-256: `82a265d0327f01504677de275619c8b28577a72864789090ced092fce8d1cc87`
`font_02_sfnt_off000128ff.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x128FF	4324 bytes
SHA-256: `d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378`

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