PDF malware analysis — malicious · c8abe3ff15aef693

MALICIOUS

PDF

86.6 KB Created: 2021-09-13 00:19:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16

MD5: 9cc53d5c6cc9031d3c8dd61a95413b84 SHA-1: c8b242a63150b18b30077fe8f861f48d727b846e SHA-256: c8abe3ff15aef6933d769c8433e2352acb4e78d3e6c3b7b8fd625fb6a7d3128a

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to disposable domains and are structured with UTM parameters, indicating a phishing or malware distribution campaign. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with a malicious document designed to redirect users to potentially harmful content.

Machine Learning

Nyx PDF Classifier malicious score 0.9958

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://pixomot.ru/uplcv?utm_term=otr+mod+apk PDF link annotation
- https://fotojursa.cz/userfiles/file/kisuzuj.pdfIn PDF document text
- http://ark-mr.com/data/home/qxu2063190031/htdocs/uploadfile/files/kotonesogepepusa.pdfIn PDF document text
- https://bnbtravels.com/ckfinder/userfiles/files/lijazejulowopukapuni.pdfIn PDF document text
- https://icicle-mountaineering.ltd.uk/ckfinder/userfiles/files/72507661028.pdfIn PDF document text
- http://wignaccent.com/FCKeditor_2.6.3/userimages/file/20210908235607.pdfIn PDF document text
- https://apexforestservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a6abb51726---52814974477.pdfIn PDF document text
- https://hophamthaibinh.com/upload/files/80337176342.pdfIn PDF document text
- https://nhahangphongcanh.com/uploads/files/76192613523.pdfIn PDF document text
- https://sweetburden.com/upload/users/files/90805975419.pdfIn PDF document text
- http://vasilii-orlov.fun/wp-content/plugins/super-forms/uploads/php/files/981375b26f465541720d2f0ac965683c/3760910765.pdfIn PDF document text
- http://vonschickenconcord.com/uploads/files/67754739134.pdfIn PDF document text
- https://kurashi-kyoiku.com/cms/dat/upimg/file/37175712265.pdfIn PDF document text
- http://abacusnancy.com/userfiles/file/ziwojivazubinokilinuda.pdfIn PDF document text
- https://xtremefitksa.com/ckfinder/userfiles/files/43629244469.pdfIn PDF document text
- https://lanegarrett.net/userfiles/file/bivomisup.pdfIn PDF document text
- https://npkfertilizerproduction.com/d/files/volid.pdfIn PDF document text
- https://comptables-publics.fr/userfiles/file/biludupawudabekovorojudep.pdfIn PDF document text
- http://winso.tw/userfiles/file/tilopisowafadokakerab.pdfIn PDF document text
- http://paglialonga.it/userfiles/files/levuxudetegizelajasenono.pdfIn PDF document text
- http://technocom.pl/editor/file/67038176257.pdfIn PDF document text
- http://ahzgbh.news-read.com/upload/files/95212411736.pdfIn PDF document text
- http://studioarclab.eu/userfiles/files/dusexobazi.pdfIn PDF document text
- http://bettaletroom.com/file_media/file_image/file/teperipalobobujuvu.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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000d643.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD643	10128 bytes
SHA-256: `2b47d922cfbf44b075df81aaa20c44ca11ee62f2236d590155aef788ccf41961`
`font_01_sfnt_off0000ecd6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xECD6	1936 bytes
SHA-256: `581ee6410b39f3fc3c0b7eee44a1f688a16d32601ddb4ff915e7da4a385d4a1a`
`font_02_sfnt_off0000f5ca.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF5CA	25296 bytes
SHA-256: `607b0c416a67aa4dc03b3d30b731caaa755d990cb3d266d331e0cb3b3d2b9aa4`
`font_03_sfnt_off0001347e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1347E	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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