PDF malware analysis — malicious · 04b697a75e985798

MALICIOUS

PDF

81.2 KB Created: 2021-05-20 17:28:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13

MD5: badf2e51e74bf46076863b6f34d4c205 SHA-1: 51ece72f47dd409aa138da04e535a0831b758646 SHA-256: 04b697a75e9857983950e4ef57dc52c115b8145829f109a9a06d866dcf8eb538

136 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains a lure related to paintball guns, which redirects to the URL https://leonvi.ru/strik?utm_term=how+much+is+co2+for+paintball+guns. This URL is flagged as a redirector for free-download phishing. ClamAV detection and ML classification strongly indicate maliciousness. The PDF structure and embedded content suggest it's designed to trick users into visiting the malicious link, likely as part of a phishing campaign.

Machine Learning

Nyx PDF Classifier malicious score 0.9997

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
Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK

PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
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://leonvi.ru/strik?utm_term=how+much+is+co2+for+paintball+guns PDF link annotation
- https://cdn-cms.f-static.net/uploads/4494877/normal_6026a5ad72cd9.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4444371/normal_5fce6cb12f726.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4450434/normal_5ff54ab5038b5.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4473023/normal_5fff7b4d66ee6.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4454182/normal_602c79abe07fd.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4407804/normal_605dcb64efb21.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4445558/normal_600011e9e82d4.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4488339/normal_5fe52ed6e5cea.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/pogolo/centrelink_reporting_calculator.pdfIn PDF document text
- https://s3.amazonaws.com/jesidofefe/aspersor_manual_bogota.pdfIn PDF document text
- https://s3.amazonaws.com/sugosubexez/equifax_credit_report_request_address.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/dec0d09a-28bd-4d5c-9eae-dbbbfa0dc494/86658761426.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/b5b4e8e5-cd20-4158-be1b-c77b0e61de5f/goroziwakugajapeduxejaj.pdfIn PDF document text
- https://s3.amazonaws.com/tufujifinobiro/bromatologia_carnes.pdfIn PDF document text
- https://s3.amazonaws.com/widofafane/what_does_mito_mean_in_french.pdfIn PDF document text
- https://s3.amazonaws.com/viromibukoleliw/34525360510.pdfIn PDF document text
- https://s3.amazonaws.com/jotogorurekuro/43527267683.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/e1d63467-dcad-4958-b1fe-484475305b9c/how_do_i_use_my_jvc_everio_camcorder_as_a_webcam.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/d5b05d93-3ddb-42cb-814d-d71162c4a44e/76939958157.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/18b834d9-e3f1-4294-bba0-b7af9f25ece8/what_is_a_synonym_for_conscience.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000ef04.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEF04	6440 bytes
SHA-256: `3d4760ca295192c89086870ebbac49c5a5945404ea6ab57fca452cf2db5f569a`
`font_01_sfnt_off0000fef8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFEF8	5752 bytes
SHA-256: `2513266e03ff1a290038e52c2d4e3b865ea849527ba33a7c7288f1f2f6e45974`
`font_02_sfnt_off00011278.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11278	10892 bytes
SHA-256: `736ea66d94aabe74bac340021d93b0c54bd40bf92bb6771e450b98d978a4bbff`

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