PDF malware analysis — malicious · 92657f9d793d5209

MALICIOUS

PDF

84.7 KB Created: 2021-09-15 11:41:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24

MD5: e99fa2e3f8e9bac65f5e2e0e2fa345ad SHA-1: 9e119a40263330b4eb85f30c6bac5812ae7ca36e SHA-256: 92657f9d793d5209cb95e4806ac4a0352ca464d8f959fd589bd0ef206f15c38e

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The sample was detected as a malicious PDF by ClamAV and an ML classifier. It contains numerous external URLs, including one that appears to be a redirector with UTM parameters, suggesting a phishing or malware distribution lure. The PDF structure and embedded content indicate it's designed to lead users to potentially harmful external sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9974

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 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.
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://ketchas.ru/uplcv?utm_term=best+guitar+scale+app+android PDF link annotation
- http://360global.ca/userfiles/file/11088273996.pdfIn PDF document text
- http://sysquare.com/UserFiles/files/99230375792.pdfIn PDF document text
- http://greentreeprep.com/cote_dor_import/admin/ckfinder/userfiles/files/94041782200.pdfIn PDF document text
- http://sloplast.com/userfiles/files/dasotiraxejazaxifuzul.pdfIn PDF document text
- http://exosushi.com/uploads/files/vifemadufepupas.pdfIn PDF document text
- http://vishwkarmaenterprises.com/webroot/img/userfiles/files/bonuz.pdfIn PDF document text
- https://mayphotocopydogia.com/upload/files/89270643322.pdfIn PDF document text
- http://kondicionery-lubertsy.ru/upload_picture/file/vipujejikixefosesamivum.pdfIn PDF document text
- https://bosingels.nl/ckfinder/userfiles/files/nakamajibuvamusuluto.pdfIn PDF document text
- https://luatkhangthai.vn/upload/fck/file/54270562576.pdfIn PDF document text
- http://civicwomen.com/ckfiles/files/72475996263.pdfIn PDF document text
- https://netwindowvn.com/uploads/userfiles/file/33360538070.pdfIn PDF document text
- http://xn--80adpfaaeictf0c6c7i.xn--p1ai/public/file/mipepepi.pdfIn PDF document text
- http://giprozdraw.ru/ckfinder/userfiles/files/22650530370.pdfIn PDF document text
- http://seamacros.com/upload/file/jilapitezi.pdfIn PDF document text
- http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16134154342aee---poxidet.pdfIn PDF document text
- http://zaiger.ru/img/file/zagunesekafefoso.pdfIn PDF document text
- http://cctechlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/guzezumavavudumite.pdfIn PDF document text
- https://retentionstudentexperience.com/wp-content/plugins/formcraft/file-upload/server/content/files/161388cb478b1d---92870447156.pdfIn PDF document text
- https://hotelreviewreserve.com/basefile/hotelreviewreservecom/files/xafinurikuperifopopari.pdfIn PDF document text
- https://demo.wsbe17hongkong.hk/_bin/ckfinder/userfiles/files/63904947631.pdfIn PDF document text
- https://www.gryf-wet.pl/ckfinder/userfiles/files/28082726166.pdfIn PDF document text
- http://keifo.ru/ckfinder/userfiles/files/90308857705.pdfIn PDF document text
- https://mandarinusa.com/userfiles/file/1631008329.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://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000e7c7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE7C7	10840 bytes
SHA-256: `eae46b4af2fc481d16ba43c3df31b27ca862ab17afbb36a361d30f38b2ef352c`
`font_01_sfnt_off000100c0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x100C0	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off000118d2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x118D2	17168 bytes
SHA-256: `651fe84c7a4c536da7fe285de8a8eaead7b32c234ae77db4d7de26a545ce6225`

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