PDF malware analysis — malicious · 46be9c5f772a22f0

MALICIOUS

PDF

84.5 KB Created: 2021-09-15 06:49:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12

MD5: 3d27af49fbe0ccb224ee23ece9b3cd05 SHA-1: f70f1c61137ef068f1a402a9ffac5464a98fc43b SHA-256: 46be9c5f772a22f0a701a46b42ab66b039a49019d2f1c9a57b52bf08b012be1c

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs, many pointing to compromised WordPress sites or disposable hosting, suggesting it's part of a link farm designed to redirect users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are consistent with a malicious document designed to lure users to external sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9974

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=samsung+galaxy+s4+imei+change PDF link annotation
- http://pileshoppen.dk/userfiles/file/12648775313.pdfIn PDF document text
- https://zerling.eu/nico/images/files/51053202290.pdfIn PDF document text
- http://www.musicboxpiano.com/contentfiles/fujefotabefafemeforofil.pdfIn PDF document text
- https://binarbaidfabrication.com/public_html/userfiles/file/vilirevukiluxosapinaluki.pdfIn PDF document text
- http://jingkangchem.com/upload/files/6027604284.pdfIn PDF document text
- http://xn--h1agcmh.com/ckfinder/userfiles/files/93746902162.pdfIn PDF document text
- http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1612f49d1497d9---8114186748.pdfIn PDF document text
- https://www.bouwenaaneensterkwerkgeversmerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1614141c6906a4---raxikes.pdfIn PDF document text
- https://ciar.vn/uploads/image/files/49804405924.pdfIn PDF document text
- https://pharma-tools.eu/galeria/file/5257185619.pdfIn PDF document text
- http://chiangmai-esc.net/user_img/files/pifubulofu.pdfIn PDF document text
- http://goodwill.pl/userfiles/file/rozewivomubuwozavetuzig.pdfIn PDF document text
- http://tcsm62.org/uploads/news/file/xuvegiwalevizavosorabota.pdfIn PDF document text
- https://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/84i4d9lh1sb0imdi05a0rr6969/79185006095.pdfIn PDF document text
- http://www.colegiometa.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/1613a04f8d8171---97566463519.pdfIn PDF document text
- https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133722f38650---44441034433.pdfIn PDF document text
- http://rosg.net/sa_upload/userfiles/file/20210907073724.pdfIn PDF document text
- http://canissapiens.com/images/uploads/file/rexetoro.pdfIn PDF document text
- http://polaryachts.com/res/wysiwyg/file/gotos.pdfIn PDF document text
- https://vakukh.ru/wp-content/plugins/super-forms/uploads/php/files/a966af4a1c1760b391ab2f1f5f5d2f9a/94222893625.pdfIn PDF document text
- https://cometsecurity.in/admin/userfiles/file/34452065304.pdfIn PDF document text
- http://www.hkqi.com/wp-content/plugins/formcraft/file-upload/server/content/files/161410facca4db---dimemowo.pdfIn PDF document text
- http://15881588.com/ckupload/files/49660341582.pdfIn PDF document text
- https://electrodomesticaruano.com/images/ckfinder/files/66379212419.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_off0000e482.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE482	18172 bytes
SHA-256: `a0c7135641e91d7f767b0b41a7fefe9504c1a7583c09d05129fb7aae7511302f`
`font_01_sfnt_off0001133f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1133F	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00012b56.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12B56	10828 bytes
SHA-256: `f68d281901d807f38e8b494bc9b40ba86f807995ec3e994578f19d6ad9658c81`

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