PDF malware analysis — malicious · 2c276d6225c26b32

MALICIOUS

PDF

87.5 KB Created: 2021-09-01 12:11:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11

MD5: 8f37f45b41db376d5c61daef75906fdc SHA-1: 941c86199f1e00f717becafdc88e3cca43a3e886 SHA-256: 2c276d6225c26b32c7f775a758eee3ab7bc1a26ee4a19761ea51f590dc90947a

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains numerous links, many pointing to compromised WordPress sites, suggesting it functions as a link farm for phishing or malware distribution. The PDF structure itself is heavily obfuscated, and while no scripts were explicitly extracted, the presence of external links and the nature of the heuristics indicate a malicious intent to redirect users to potentially harmful content.

Machine Learning

Nyx PDF Classifier malicious score 0.9919

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://impariant-club.ru/wp-content/plugins/super-forms/uploads/php/files/9c9ea16102a348dfcfff6269a75d0ed7/bifoxevik.pdf In PDF document text
- http://starlightcelebrates.ca/clients/4/43/43e9139217482d7666ce300faf566241/File/80023156460.pdfIn PDF document text
- http://www.findvoters.com/userfiles/file/bugafenozufi.pdfIn PDF document text
- https://transcendenceit.com/wp-content/plugins/super-forms/uploads/php/files/0958207f6a58fe117ed479b0eb214d4c/lejesatezonokujurediwe.pdfIn PDF document text
- http://scantech3d.com/files/fubosig.pdfIn PDF document text
- http://kamkmori.cz/ckfinder/userfiles/files/34656228178.pdfIn PDF document text
- https://calmoinc.com/upload/editor/file/30467396788.pdfIn PDF document text
- https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be4aa994d96---meneladutufadokiganonuw.pdfIn PDF document text
- http://ajivikafinance.com/userfiles/file/dobabe.pdfIn PDF document text
- https://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad122f6bd43---5484381278.pdfIn PDF document text
- https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1608067417274d---60385747547.pdfIn PDF document text
- http://yilip.net/userData/board/file/wijalupadaloze.pdfIn PDF document text
- https://www.sadcmedia.com/wp-content/plugins/super-forms/uploads/php/files/1d5rqrrsmr4b6ir9ti27i4tfe4/41491543117.pdfIn PDF document text
- http://medica-brno.com/files/5445320264.pdfIn PDF document text
- https://itacademyindia.com/ckfinder/userfiles/files/78368467257.pdfIn PDF document text
- http://www.grifin.sk/files/4452402156.pdfIn PDF document text
- https://centrobrands.com/wp-content/plugins/super-forms/uploads/php/files/05b69b2733557e74e42f3d8615188e58/vowezukalubakadotudavubo.pdfIn PDF document text
- http://tks-forever.com/upload/2021/06/24/file/89587924965.pdfIn PDF document text
- http://polloricowings.com/uploads/files/nijedopiwojorodu.pdfIn PDF document text
- https://voicelux.ru/wp-content/plugins/super-forms/uploads/php/files/a33ee446750eec099566beca1b4bd37b/dukidivadebu.pdfIn PDF document text
- https://chilegastronomia.cl/uploads/userfiles/files/rexaselodexibogezonep.pdfIn PDF document text
- http://indecomavo.pl/inc/92926488031.pdfIn PDF document text
- https://angelsforwarriors.org/userfiles/files/2310243948.pdfIn PDF document text
- https://lightspec.com/wp-content/plugins/super-forms/uploads/php/files/e5b82dcc085532d5aa014889f477805e/76251460448.pdfIn PDF document text
- https://vuaship.com/wp-content/plugins/super-forms/uploads/php/files/fag3paorbe0qms1pb3o06i0obo/85422589266.pdfIn PDF document text
- http://capitaloffice.pl/fotki/file/80022632949.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=mario+wings+to+the+sky+red+switchPDF 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_off0000efb3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEFB3	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off000107c5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x107C5	18048 bytes
SHA-256: `8597feca52c14b1d5397e38cfdbac6224d277527980f7a10e12da76fd6e88799`
`font_02_sfnt_off00013614.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13614	10888 bytes
SHA-256: `a0117167900ce10706e16105ae32edace902c4190b2400489b8732c3b89970cf`

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