PDF malware analysis — malicious · 78f249ecc35fef5e

MALICIOUS

PDF

78.1 KB Created: 2021-04-01 00:52:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30

MD5: 66dfdb98300f1e53eacb7afa1d9fcb1f SHA-1: 3d28d18efacc28289794b8fb27eb857a3ea83045 SHA-256: 78f249ecc35fef5ebcf64a84f974f5b8143081f8ad6d811f2b86f0709cc18f5a

214 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, with one critical heuristic identifying it as a malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were extracted, the presence of malicious links suggests an attempt to redirect users to phishing or malware-hosting sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9992

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
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.
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://yafferge.ru/aws?utm_term=how+to+bar+chords+easier In PDF document text
- https://cdn-cms.f-static.net/uploads/4477408/normal_60208dff29050.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4368975/normal_6007bb2619632.pdfIn PDF document text
- http://ramuwesitavoz.mywebcommunity.org/minecraft_windows_10_free_download_full_version.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4423462/normal_6051e0a85f038.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4417024/normal_603354bf826ad.pdfIn PDF document text
- http://dudoxanudito.scienceontheweb.net/barrierefreies_bauen_din_18040.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://s3.amazonaws.com/tobaziw/medonuxexed.pdfIn PDF document text
- https://s3.amazonaws.com/lolijexejomak/purevpn_openvpn_server_list_download.pdfIn PDF document text
- https://s3.amazonaws.com/gekixadonuru/minazajipenejis.pdfIn PDF document text
- https://s3.amazonaws.com/venunamazozuzo/burhanuddin_moula_photos.pdfIn PDF document text
- https://s3.amazonaws.com/vaxebisapesi/free_music_app_ios.pdfIn PDF document text
- https://02664c88-84e5-42fa-aae3-682d3a0d4328.filesusr.com/ugd/39d081_da052b51cac44131960837f1cdb5e272.pdf?index=trueIn PDF document text
- https://3568ea06-17fa-4787-91ae-86b9aa918cbd.filesusr.com/ugd/8ade13_ca59b15e3e8e495889c0fa48dab2b29c.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/xunilukegez/wikakuzutotiwal.pdfIn PDF document text
- https://s3.amazonaws.com/feseni/ray_tracing_and_image_formation_with_a_concave_lens.pdfIn PDF document text
- https://s3.amazonaws.com/sefukirexuwekij/75642076363.pdfIn PDF document text
- https://e2604e0b-f95a-4acb-b53f-a7db3827b2a1.filesusr.com/ugd/225520_25bd09969b9a4ebeb3698d10806aa6d9.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/pokixovuxik/austin_mahone_what_about_love_video.pdfIn PDF document text
- https://00c0516a-c822-4344-a779-6f74e039753d.filesusr.com/ugd/9e41f0_3d14a0f32a61498494f3dbdfff71f239.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/xonaxevetaf/where_to_get_cpr_aed_certified_near_me.pdfIn PDF document text
- https://4fd47d7d-96cb-4cdc-943f-55997d715fc9.filesusr.com/ugd/ab3424_3bf38714b5fe4c428bf09d55535cea6b.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/rovikibixu/64084915049.pdfIn PDF document text
- http://bujekotu.atwebpages.com/best_english_literature_courses_in_uk.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_off0000e628.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE628	4868 bytes
SHA-256: `8135f0f6ff93e26af581873b43c6373baac818833c30fc9cfdc5a72122d897f4`
`font_01_sfnt_off0000f6d1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF6D1	10840 bytes
SHA-256: `b790081f91c82d047f64132a3e079c910f5ff74b6802e6437c12b35bb3c02da8`
`font_02_sfnt_off00011bf3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11BF3	4324 bytes
SHA-256: `1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361`

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