PDF malware analysis — malicious · d1d1b02dfeca761f

MALICIOUS

PDF

70.2 KB Created: 2021-09-04 09:26:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23

MD5: 78898b2bacce8905e1b07a99047e440a SHA-1: fdad593cacaf85cb0919527c47b37b7ee13aa303 SHA-256: d1d1b02dfeca761f4b571d7d9a0e18287cf19f0dff417157d7c8f1f556bcfc82

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains numerous links to external websites, many of which are hosted on compromised CMS upload directories or disposable domains, suggesting a link farm designed to redirect users to malicious content. While no scripts were explicitly extracted, the nature of the links and the detection as a trojan indicate a likely intent to deliver a second-stage payload or phish for credentials.

Machine Learning

Nyx PDF Classifier malicious score 0.9975

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://smidgel.ru/uplcv?utm_term=exida+exsilentia+manual PDF link annotation
- https://lixtech.com.tw/ckfinder/ckfiles/files/bikusog.pdfIn PDF document text
- http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a447fcaa482---57994913127.pdfIn PDF document text
- http://www.expertnutritionadvisor.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a972a26ee29---finomomixozi.pdfIn PDF document text
- https://leicht-spb.ru/wp-content/plugins/super-forms/uploads/php/files/45f658b9c110e18ac0baa34ff60deaf4/18742850271.pdfIn PDF document text
- http://agavietnam.com/img/files/wanuxabarogaxobugimas.pdfIn PDF document text
- https://fieldofgreen.com/wp-content/plugins/super-forms/uploads/php/files/0af176b4c507af91938eae28a419a056/67533648388.pdfIn PDF document text
- https://shared401k.com/wp-content/plugins/super-forms/uploads/php/files/60df858e0970ee0c4a1c66334ab8145e/fadefopesitexezugeralewez.pdfIn PDF document text
- https://www.idromeccanicasrl.com/idromeccanicasrl.com/wp-content/plugins/super-forms/uploads/php/files/7b7f14ba99cdd885b06be2eb00997646/binarutipotetunuvefix.pdfIn PDF document text
- http://hertzlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/80501930583.pdfIn PDF document text
- http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16084d2e89ab60---15985052166.pdfIn PDF document text
- https://www.a2zmedical.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608841f37038a---52696635340.pdfIn PDF document text
- http://flygarfield.net/userfiles/file/joxuzije.pdfIn PDF document text
- https://m-co.de/wp-content/plugins/super-forms/uploads/php/files/qvk27349ecpio9k7jh05k79hj1/66654946854.pdfIn PDF document text
- http://onlinemidias.com/ckfinder/userfiles/files/10468217805.pdfIn PDF document text
- https://www.budgetskemaet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16070ae687d502---nulepada.pdfIn PDF document text
- https://thegioibaobicarton.com/Images_upload/files/69339868371.pdfIn PDF document text
- https://www.tctnanotech.com/wp-content/plugins/super-forms/uploads/php/files/7e8b3a944f65340a98e93b227eb5f61d/sezamibeje.pdfIn PDF document text
- http://rheinmotel.com/userfiles/file/vekerisuwoz.pdfIn PDF document text
- https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/16087fd1b584e3---bupefike.pdfIn PDF document text
- http://patrick-jardinage.fr/ckfinder/userfiles/files/260465012.pdfIn PDF document text
- https://cuisinescartier.ca/upload/editor/file/josasuxite.pdfIn PDF document text
- https://amiablediamonds.com/wp-content/plugins/super-forms/uploads/php/files/ba72e988614e4a9ec595ad2f6b073af0/nufukalatebimusufugikej.pdfIn PDF document text
- http://conomiya.com/images/uploadedimages/file/99197146843.pdfIn PDF document text
- http://domosplast.hu/files/file/30962289476.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_off0000b820.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB820	10376 bytes
SHA-256: `591f40b6867706c61e24f7670255c96fb093f549da5492cef51c94de80bb44dd`
`font_01_sfnt_off0000cf84.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCF84	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off0000e796.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE796	14412 bytes
SHA-256: `ce21ccde5665becae8a3eff75138714e67228fd5aebdd446848161eecddf7b87`

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