PDF malware analysis — malicious · a569c0e2a23f9bcc

MALICIOUS

PDF

205.0 KB Created: 2021-07-19 20:11:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27

MD5: 7637b81329de81a125743a3dc5a14257 SHA-1: 2ce98a0189d3a11c09900df6b3b2c3e5ccf6411f SHA-256: a569c0e2a23f9bcc15b3a688216912df33395e161bf92b7109a9cdc04c254c28

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains embedded JavaScript and multiple external URIs, with a critical heuristic indicating it's a phishing trojan. The presence of a link farm pointing to compromised WordPress upload storage suggests an attempt to host malicious content or redirect users to phishing sites. The embedded JavaScript likely facilitates the redirection or execution of further malicious actions.

Machine Learning

Nyx PDF Classifier malicious score 0.9703

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.
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 http://hnspkjx.com/d/files/didafowowikogelida.pdf In PDF document text
- https://gertiesbloomers.com/kousumi/nulook/upload/fckimages/file/vupomarigelakew.pdfIn PDF document text
- http://ninda.vn/userfiles/files/jowikixoj.pdfIn PDF document text
- http://architects-desk.com/uploadsfile/36041114833.pdfIn PDF document text
- https://interesttour.com/wp-content/plugins/super-forms/uploads/php/files/2e0daaf2a517ea284624406569e1ee8f/91113161821.pdfIn PDF document text
- https://udachi.co.th/wp-content/plugins/super-forms/uploads/php/files/5g1t4p2p2oln8qk45ku6id73i9/79967723810.pdfIn PDF document text
- https://angkortaxiservice.com/userfiles/file/87596914200.pdfIn PDF document text
- http://www.recetasyconsejos.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ffed8490b1---75928871969.pdfIn PDF document text
- http://socialbomjesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607c8833e52dc---49352640561.pdfIn PDF document text
- https://cristalensi.com/public/File/1888981676.pdfIn PDF document text
- https://www.ediliziaindustriale.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079cf34cb332---pesifofedipomabes.pdfIn PDF document text
- http://www.magicapro.it/wp-content/plugins/formcraft/file-upload/server/content/files/1606d5f310f2f0---fukopifufafidewabe.pdfIn PDF document text
- http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/ouab8j4spnnaaeu1odg7j9jga7/padiruboge.pdfIn PDF document text
- https://www.a2zmedical.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607938453d339---79874637066.pdfIn PDF document text
- http://nc-israel.ru/upload/files/kuxepijixolazogosub.pdfIn PDF document text
- http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/160792a9a67c08---jigijoran.pdfIn PDF document text
- https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/160b3e3e4da345---jukuwemoliwexurabuvep.pdfIn PDF document text
- https://juhaszautovill.hu/userfiles/file/55557776789.pdfIn PDF document text
- https://janeunchained.com/wp-content/plugins/super-forms/uploads/php/files/38hvro1c1tj8ubkjefheibpmbb/morepabexowotufufawunopel.pdfIn PDF document text
- http://stcforanebanglore.smcim.com/www/js/ckfinder/userfiles/files/nexidovuxolivuvufavod.pdfIn PDF document text
- https://aadharshilaschool.org/userfiles/file/lokuxuguvabemun.pdfIn PDF document text
- http://ezibra.pl/upload//file/godokenodafaj.pdfIn PDF document text
- https://aspaeng.com/files/image/files/doboxikofelutojef.pdfIn PDF document text
- http://kondicionery-vidnoe.ru/upload_picture/file/dakikemegus.pdfIn PDF document text
- https://www.chortho.co.uk/wp-content/plugins/super-forms/uploads/php/files/7j6ignm7psv04hsoorth9pgu7r/8735458651.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=headway+elementary+student%27s+book+fourth+edition+pdfPDF link annotation
- 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_off0002be53.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x2BE53	19192 bytes
SHA-256: `190f58d4ca51562a4247e2f71f84cbce6ae2098afba1207fccd979fbf8a3e463`
`font_01_sfnt_off0002f1ab.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x2F1AB	11320 bytes
SHA-256: `997d4e47638bb27e2e2f8b4062277495883cd1f15bf749260f2616bd07097d38`
`font_02_sfnt_off00030be4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x30BE4	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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