PDF malware analysis — malicious · 9d2b5d7450f01acc

MALICIOUS

PDF

76.1 KB Created: 2021-09-06 00:00:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23

MD5: 5accaa413de8fd3a4b879d478cbd0073 SHA-1: 3a27c8610cc29c85429411cc55c323396142c195 SHA-256: 9d2b5d7450f01acc1f73b452a1d354f08e3b924660f73ecc665ee3d62c2a69ff

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier. It contains numerous embedded URLs, many of which point to compromised CMS upload directories or disposable hosting, indicating a link farm designed to redirect users to malicious content. The document body is unreadable, but the heuristic firings strongly suggest a phishing or malware distribution attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9840

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://hosvagyok.hu/userfiles/file/lazuzujuzotenud.pdf In PDF document text
- http://sintellect.ru/Repository/file/56171372399.pdfIn PDF document text
- https://bokseinstituttet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160a83532b0eb7---wakokamilitotesezoduz.pdfIn PDF document text
- https://finestblogger.de/wp-content/plugins/super-forms/uploads/php/files/5oqq7uusg134ngn28mfdi4os5f/musete.pdfIn PDF document text
- http://www.serge-valentin.net/ckfinder/userfiles/files/11645912443.pdfIn PDF document text
- https://voicelux.ru/wp-content/plugins/super-forms/uploads/php/files/9d2aab8441b46f60fa88731039cb4b34/96027444831.pdfIn PDF document text
- http://caratow.eu/userfiles/file/26898072819.pdfIn PDF document text
- http://helderlive.nl/ckfinder/userfiles/files/61833566971.pdfIn PDF document text
- https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba82fd35c3f---45590197483.pdfIn PDF document text
- http://bluestandard.pl/ckfinder/userfiles/files/jipitimokukuxegoxox.pdfIn PDF document text
- https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/b7fbbfd8215d3dd4c859d08742d1b1b2/69519665943.pdfIn PDF document text
- http://acgroupenterprise.com/userfiles/file/13356123458.pdfIn PDF document text
- http://vladjurnalist.ru/archive/file/xomitopum.pdfIn PDF document text
- http://zonweringbelgie.com/ckfinder/userfiles/files/ralok.pdfIn PDF document text
- http://kiapelhrimov.cz/UserFiles/File/vowimadixabadexigo.pdfIn PDF document text
- https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/de3943b8d6770ebca7f3f016fbdad6d7/38216440851.pdfIn PDF document text
- http://honghuibio.com/d/files/31768837786.pdfIn PDF document text
- https://www.marbelitesa.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160976ecdad26e---voxuk.pdfIn PDF document text
- http://ypcalumni.com/clients/2/24/24042806289e0d450134266962f0a0d8/File/98752191935.pdfIn PDF document text
- https://cremyco.com/app/webroot/docs/file/86086025795.pdfIn PDF document text
- https://travolution.travel/wp-content/plugins/super-forms/uploads/php/files/aed98f9c874f7cae385fcf6862166aa5/99673687118.pdfIn PDF document text
- https://www.cukoyem.com.tr/wp-content/plugins/super-forms/uploads/php/files/88aldvcnhqq22j8n9e70kde4p3/wijedobakusuzanet.pdfIn PDF document text
- http://sjhrz.com/images/upload/File/54454224113.pdfIn PDF document text
- https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5852e14545---78977633816.pdfIn PDF document text
- https://phoenixknights.co.uk/wp-content/plugins/super-forms/uploads/php/files/1f5a4c155dea89c52b86dd29ac6a6596/21978347496.pdfIn PDF document text
- https://defaico.com/d/files/vuzatu.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=xiaomi+repeater+v2+manualPDF 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_off0000bf45.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xBF45	20628 bytes
SHA-256: `734be0c449831d8751ddc3a368f090b96d57cc406bddb183240a18359a085d18`
`font_01_sfnt_off0000f2e3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF2E3	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00010afa.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10AFA	10540 bytes
SHA-256: `cbd8da02b3b36029e178693b0c0ded50fed1ba78cd966e2871f940b45825002a`

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