PDF malware analysis — malicious · 4d87e89bbf7d5978

MALICIOUS

PDF

124.3 KB Created: 2021-08-06 14:03:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21

MD5: bf3d8d9b890491144f65dfa303463307 SHA-1: 0370df10061090e2273a5af52e8bae9bb8b672a1 SHA-256: 4d87e89bbf7d5978a3dff4c74b6add9cebe0de5b5e4bef87946dee27cc8dbd63

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document functions as a link farm, containing numerous URLs pointing to various domains, some of which appear to be compromised or disposable hosting. The primary purpose seems to be redirecting users to external content, potentially for phishing or malware distribution.

Machine Learning

Nyx PDF Classifier malicious score 0.9811

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 http://fabrykakonwersji.pl/wp-content/plugins/super-forms/uploads/php/files/7f770f2be36c5ee7b66b11cbf14660b4/98104098058.pdf In PDF document text
- https://amursvoidom.ru/media/files/43066791603.pdfIn PDF document text
- https://pavillonwohlen.ch/userfiles/files/zetivefodi.pdfIn PDF document text
- https://isabellepieman.com/userfiles/file/35868810429.pdfIn PDF document text
- http://concilianavarra.com/userfiles/files/50699008195.pdfIn PDF document text
- http://www.cuadernos.in/wp-content/plugins/formcraft/file-upload/server/content/files/1610cdf3730c37---bidotitarepizexat.pdfIn PDF document text
- https://fedico.ca/upload/editor/file/tuwetovof.pdfIn PDF document text
- http://textingrights.com/userfiles/files/65589224283.pdfIn PDF document text
- http://gleneaglehoa.org/images/file/koxari.pdfIn PDF document text
- http://theettiares.com/clients/f/f0/f03dfc1790708d0b03c48e9879ef2ea6/File/sixamejigogomedoj.pdfIn PDF document text
- https://parc-hotel.info/file/31733273404.pdfIn PDF document text
- http://capesociety.ca/uploads/files/65429635584.pdfIn PDF document text
- https://zemiigori.com/uploads/file/3458419556.pdfIn PDF document text
- http://www.sandzthabapanel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160782525a4be4---34518382690.pdfIn PDF document text
- https://www.spoton.pet/wp-content/plugins/super-forms/uploads/php/files/of7crfg6tmuibeucije1iogma8/wawisawelib.pdfIn PDF document text
- https://bellevuecommunityfoodbank.org/wp-content/plugins/super-forms/uploads/php/files/c79575635d0e39e09367d35192763156/soxibetejof.pdfIn PDF document text
- http://www.39koratmachinery.com/file_upload/files/53004509703.pdfIn PDF document text
- https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/160da66babdede---nisoxufebara.pdfIn PDF document text
- https://ukmalayalamnews.com/userfiles/file/76324248494.pdfIn PDF document text
- http://lyjclinic.com/ckupload/files/64244701366.pdfIn PDF document text
- http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608d08cc2fb3a---99119231411.pdfIn PDF document text
- http://agiusfuneraldirectors.com/files/file/24991508185.pdfIn PDF document text
- https://www.grandiosa.is/wp-content/plugins/super-forms/uploads/php/files/1jj3c6eo3dv6jv99e1gpv5d751/basaj.pdfIn PDF document text
- https://www.brunosistemi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b4c0547a37---ribinenapenonafimozu.pdfIn PDF document text
- http://la-roofers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609d941384272---41081778102.pdfIn PDF document text
- http://drapa-technika.cz/UserFiles/File/kanodavesi.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=pokemon+black+and+white+2+randomizer+nuzlocke+downloadPDF 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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_006_off000186ff.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x186FF	21604 bytes
SHA-256: `c942c6a5ec69218c2877b8b6dc8674f4c20ef0086cfb5e38c64140f3ca87f22d`
`font_00_sfnt_off00015538.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x15538	11064 bytes
SHA-256: `f8ed54bae75e70083ffff80a204f0beb4e335b90201bf43fb3947259ca9e9135`
`font_01_sfnt_off00016eee.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x16EEE	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_03_sfnt_off0001ad10.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1AD10	21436 bytes
SHA-256: `8f7df44cf01b22f140e29244d4824769bcfdb29a8b2583541021e87ef98b1cbc`

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