PDF malware analysis — malicious · 03c62aefd0e5229f

MALICIOUS

PDF

91.5 KB Created: 2021-09-13 14:15:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24

MD5: 9a64a96fb120d4cdafa4d5f3c81bfd61 SHA-1: e4afcfa771083600add865e4c37a55c2f71a6af6 SHA-256: 03c62aefd0e5229f45e734f904b0cc48ac0161797759282b784b13b32258054b

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs that point to various websites, many of which appear to be compromised or disposable hosting. The heuristic firings indicate this PDF is part of a link farm designed to lure users to external sites, potentially for downloading malware or engaging in phishing activities. The ML classifier and ClamAV detection strongly suggest malicious intent.

Machine Learning

Nyx PDF Classifier malicious score 0.9949

Heuristics 6

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 link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM

PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
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://drafthe.ru/uplcv?utm_term=the+amazing+spider+man+1+apk+free+download PDF link annotation
- https://prospr.fr/ckfinder/userfiles/files/fovaxitiwizekiti.pdfIn PDF document text
- https://www.verimevzabavu.cz/ckfinder/userfiles/files/jajipugamizalaja.pdfIn PDF document text
- http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134a61a34157---toweparigotiwefovuj.pdfIn PDF document text
- https://kalashad.com/userfiles/file/badubomefugoxadadidor.pdfIn PDF document text
- http://sourceandsecure.com/uploads/userfiles/file/7611891024.pdfIn PDF document text
- https://nisahanpin.com/calisma2/files/uploads/guvobovosofod.pdfIn PDF document text
- https://artedeeducar.com.br/ckfinder/userfiles/files/8856427521.pdfIn PDF document text
- https://thepetrichortouch.com/wp-content/plugins/super-forms/uploads/php/files/vidl98t55k428mssrdmiv0b8t9/72517597863.pdfIn PDF document text
- http://oresteruggiero.com/userfiles/files/12417610101.pdfIn PDF document text
- http://dentish.ru/ckfinder/userfiles/files/37291178948.pdfIn PDF document text
- http://turbotechnik24.de/userfiles/file/gonubusu.pdfIn PDF document text
- http://6nergy.fr/6nergy/sites/default/user/file/wetesosu.pdfIn PDF document text
- http://curry-box-deluxe.de/userfiles/file/pubelemadexojunabodajaz.pdfIn PDF document text
- http://www.tlo.ntou.edu.tw/ckfinder/userfiles/files/fibosuvodimisomi.pdfIn PDF document text
- http://lawngo.net/fckfiles/6736110657.pdfIn PDF document text
- http://aurastaffing.es/upload/file/60182758439.pdfIn PDF document text
- http://webminmax.com/userfiles/file/65717669322.pdfIn PDF document text
- https://retentionstudentexperience.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139e5bd4dcff---39520343492.pdfIn PDF document text
- http://agisinfo.ru/uploads/content/files/manemozagajefajiwejoli.pdfIn PDF document text
- http://parvazyab.net/basefile/api203/files/32414859837.pdfIn PDF document text
- http://akicgiyim.com/userfiles/file/guxasog.pdfIn PDF document text
- https://regenerativetherapyforpain.com/wp-content/plugins/super-forms/uploads/php/files/9056f7c443140c3d80d83674389c24ae/60915857756.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_off0000de15.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDE15	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000f627.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF627	22400 bytes
SHA-256: `24e0d9976a3dc1dba1879d32155f5c045341a6c4935cb70fcb064280feb1964a`
`font_02_sfnt_off0001305f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1305F	16148 bytes
SHA-256: `b17e3c388ca520c70044df51a505a8c8de3d1ca9b2e495c629779bc8d31aca59`
`font_03_sfnt_off000145ef.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x145EF	11100 bytes
SHA-256: `6c1b007a6fb8b800053a01046440fd8c5e57d55b967519253ee5727495792f1c`

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