PDF malware analysis — malicious · 3eae1960dd00e47d

MALICIOUS

PDF

81.7 KB Created: 2021-10-07 20:10:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25

MD5: f990eea3b83acfcf626637b3ec06d9a5 SHA-1: 55dfdf2412d5c9aaf12e1090e302777bb829744a SHA-256: 3eae1960dd00e47dc2f514ac63b160560610449453c39e92635b00a94ab2fb52

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and multiple external URIs, indicating a malicious intent to redirect the user to potentially harmful websites. The heuristic 'SE_CALLBACK_LURE' suggests the document is designed to mimic a billing or refund notification, a common tactic for phishing and scam operations. The presence of numerous links and the ML classifier's high confidence score further support this assessment.

Machine Learning

Nyx PDF Classifier malicious score 0.9968

Heuristics 7

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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.
Callback phishing phone lure medium SE_CALLBACK_LURE

Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
Embedded JS stream low PDF_JS

PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
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=popular+take+out+food PDF link annotation
- https://inprovitvenezuela.com/ckfinder/userfiles/files/jepax.pdfIn PDF document text
- http://hennel.hu/sources/elemek/file/1123058869.pdfIn PDF document text
- http://gearcon-eng.com/file_media/file_image/file/xomop.pdfIn PDF document text
- http://cokhivietuc.webthoidai.com/img-vietuc/files/68963288095.pdfIn PDF document text
- http://doks-films.com/pcms/content/file/95888806161.pdfIn PDF document text
- https://ourguarantees.com/userfiles/file/36580147491.pdfIn PDF document text
- http://harringtonassociateslaw.com/Test/JabzMedicalBillingService/userfiles/file/99759409381.pdfIn PDF document text
- http://asijskepotraviny.cz/files/file/vonavufisizakefituboreba.pdfIn PDF document text
- http://busankid.com/webfiles/board/file///78863026631.pdfIn PDF document text
- https://10fci.net/userfiles/file/tirubikelenazir.pdfIn PDF document text
- http://handmade.sdelaemlegko.ru/files/userfiles/files/4316449834.pdfIn PDF document text
- https://duel.pl/userfiles/file/42514478519.pdfIn PDF document text
- http://delta-serwis.pl/pliki/pagolebenak.pdfIn PDF document text
- https://bouveau-consulting.com/userfiles/file/50116763840.pdfIn PDF document text
- http://glovimex.com/uploads/ckfinder/files/29968653505.pdfIn PDF document text
- http://xn--80aaaghhaztbcd1agjgbccsgfftf.xn--p1ai/pict/file/zuxivofuwopizu.pdfIn PDF document text
- http://iknow.pl/files/file/90627559928.pdfIn PDF document text
- http://olymp-kiev.com/temp/fckeditor/file/fuxiwirim.pdfIn PDF document text
- https://www.hungryalex.com/wp-content/plugins/super-forms/uploads/php/files/329066b6121351e34ed192b3ed5d22cd/76756615990.pdfIn PDF document text
- http://adidravidar.com/ckfinder/userfiles/files/gulixotozujeziponifi.pdfIn PDF document text
- http://zs-g.jp/app/webroot/js/ckfinder/userfiles/files/gudavob.pdfIn PDF document text
- https://istanajp.com/contents/files/nulodidajaxapebi.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_off0000d0d5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD0D5	10320 bytes
SHA-256: `47d508acd00703c63bda42bbbcc93b4ea0c40f74050fcd5afbb829ac55b2e78a`
`font_01_sfnt_off0000e852.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE852	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00010064.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10064	22092 bytes
SHA-256: `2756bb34c0208318e4f44cb9af2db1b516753ba25624ec96052f4c4debaed71e`

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