PDF malware analysis — malicious · 1548a94550b5b5ad

MALICIOUS

PDF

79.9 KB Created: 2021-09-16 07:24:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24

MD5: 1cdbe7006a2dff907d749243db0c84dc SHA-1: b613cdf94520f51cd0443bbf17139ad8aa8cf5cc SHA-256: 1548a94550b5b5ada41f988053545fdd29be7bb7e7b9e267f62b53d31d7a386a

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, exhibiting characteristics of a phishing or trojan distribution. It functions as a link farm, containing numerous URLs that redirect to other PDF files hosted on various domains, likely to obscure the final malicious destination. The presence of multiple PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics indicates a deliberate attempt to use compromised or disposable hosting for distribution.

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 http://szsahsh.com/uploads/files/dikixenuvef.pdf In PDF document text
- http://kayamedbursa.com/userfiles/file/97901200349.pdfIn PDF document text
- https://purefeeling8.com/data/file/41003069630.pdfIn PDF document text
- http://sinoscaform.com/upload/ckimg/files/202109160521176938.pdfIn PDF document text
- http://xn--3e0b556bhrbowi6undva.com/ckupload/files/jatux.pdfIn PDF document text
- http://agrostroi-proekt.ru/ckfinder/userfiles/files/konoredetedamitugoxe.pdfIn PDF document text
- https://rhythmcprandfirstaid.com/wp-content/plugins/super-forms/uploads/php/files/857d4636dc0a6b0f6369558919e316a8/ziluwufefutajebirakojupo.pdfIn PDF document text
- http://vdavloeren.be/userfiles/files/94525812.pdfIn PDF document text
- http://giteduguedesboires.com/userfiles/file/93552204114.pdfIn PDF document text
- https://www.peeryhotel.com/wp-content/plugins/super-forms/uploads/php/files/650dd75231161d32b70eb2c74e8e1c44/87772890900.pdfIn PDF document text
- http://chi-kara.net/Upload/files/21522567210.pdfIn PDF document text
- http://www.frank-diagn.hu/userfiles/files/rurimanejuzu.pdfIn PDF document text
- http://longruiglass.com/ckfinder/userfiles/files/20210913_081635.pdfIn PDF document text
- https://fmpride.com/wp-content/plugins/super-forms/uploads/php/files/c7cc941c1937714b4b22887633c63778/venijoj.pdfIn PDF document text
- http://kahasat.cz/data/file/36392376372.pdfIn PDF document text
- http://boras-sjuharad.boj.se/uploads/userfiles/files/daditalebo.pdfIn PDF document text
- https://tl-systems.hu/files/files/jimamaxowuwipixuzaja.pdfIn PDF document text
- https://premiumvipbusiness.com/wp-content/plugins/super-forms/uploads/php/files/a335179197ba19403c612c0c10c480f8/91459472946.pdfIn PDF document text
- http://flirtproducties.nl/ckfinder/userfiles/files/mojumilowexojoduwowesogox.pdfIn PDF document text
- http://draftingfloorplan.com/ckfinder/userfiles/files/mokixinutafetaxapiwo.pdfIn PDF document text
- https://eyetracking.pl/userfiles/file/fagujikikunojuxazimikabu.pdfIn PDF document text
- http://ms-domino.eu/images/file/files/pakowigidaxofate.pdfIn PDF document text
- https://vpmemorial.net/images/file/8872010845.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=ka+pae+ranasingam+full+movie+download+tamilrockersPDF link annotation
- https://tes-sys.com/uploads/ckfinder/files/20210914/16316175637047.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_off0000cca7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCCA7	19256 bytes
SHA-256: `f7f09c7b3f72a035c40eaacf6eeebb61844920440124d4b772e25ad093b52004`
`font_01_sfnt_off0000fed8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFED8	11300 bytes
SHA-256: `2c7ee649f2040ea05c24af400cd3ab751ddd86809ee12f21dd3e528c5e4053d8`
`font_02_sfnt_off0001194b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1194B	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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