PDF malware analysis — malicious · 369b6e705b3a1597

MALICIOUS

PDF

87.0 KB Created: 2021-07-01 10:45:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11

MD5: c039419f3cc4b63d45c82455d3e7bb73 SHA-1: bf546f4d24885aa169a2ce20b8ace466ab09af43 SHA-256: 369b6e705b3a15973e4038ac92f97784cd5f368c9dc5f2a469c64199edeccc8b

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file is identified as a malicious PDF by multiple heuristics and a machine learning classifier. It contains numerous links to external websites, many of which are hosted on compromised WordPress installations or disposable domains, suggesting a link farm or phishing lure. The presence of PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics indicates a tactic to leverage search engine optimization on compromised sites for malicious purposes. While no scripts were explicitly extracted, the nature of the PDF and its embedded links strongly suggest it's part of a phishing or malware distribution campaign.

Machine Learning

Nyx PDF Classifier malicious score 0.9942

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://zaun-produzent.de/userfiles/file/mumaxowupisoso.pdf In PDF document text
- http://www.moteco.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607bbf66f2746---vegedan.pdfIn PDF document text
- http://szentdorottyapatika.hu/files/rifogukovimozad.pdfIn PDF document text
- http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160d57ed6d4c33---gupogaxonifowomagizigub.pdfIn PDF document text
- http://www.k-24.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cd8f83147b---89230225208.pdfIn PDF document text
- http://www.combatsim.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160a20bb043265---52191893635.pdfIn PDF document text
- https://grandhotelbulgaria.com/userfiles/file/gujexibiboxepejop.pdfIn PDF document text
- http://albatrossmrn.com/konadnew/userfiles/file/wugimamoguzatuzavinuxine.pdfIn PDF document text
- https://bf-pomosch.ru/wp-content/plugins/super-forms/uploads/php/files/uf9dovpbqvabmea3m2q8fvk0n0/luxomojaxeninosekizabi.pdfIn PDF document text
- https://ateneoarbonaida.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9bd366df7b---42201561346.pdfIn PDF document text
- https://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad8e4952387---kolamepofopez.pdfIn PDF document text
- https://karapinarinsaat.net/userfiles/upload/file/bokapusumexov.pdfIn PDF document text
- http://dharmapremipariwar.org/userfiles/file/21679160263.pdfIn PDF document text
- http://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607396325ef32---11790492106.pdfIn PDF document text
- https://a5productions.com/home/a5pro/public_html/ckfinder/userfiles/files/16717911003.pdfIn PDF document text
- http://ecbpolska.pl/wp-content/plugins/super-forms/uploads/php/files/cedfd8abf304f74611f08d88f9368aa0/26785010416.pdfIn PDF document text
- http://jingluo.net/uploadfiles/files/xivomokemalegodaritarax.pdfIn PDF document text
- https://oneremote.ru/wp-content/plugins/super-forms/uploads/php/files/538bedccbd4ffd7f07b743b68ab4bfb2/42185108938.pdfIn PDF document text
- https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606f500aae1a6---12218014128.pdfIn PDF document text
- https://cor.org.ar/wp-content/plugins/super-forms/uploads/php/files/cp2heti7q9q41ef3d3qgq0kfoq/19361106506.pdfIn PDF document text
- http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a70470addc1---wotekosizibesevojovev.pdfIn PDF document text
- https://udachi.co.th/wp-content/plugins/super-forms/uploads/php/files/dcvaurts09f9bcpe55cd3ndar7/81274775470.pdfIn PDF document text
- http://www.findvoters.com/userfiles/file/48666003284.pdfIn PDF document text
- https://alphaveneers.co.uk/wp-content/plugins/super-forms/uploads/php/files/040dff804393b312e92a6106ae8739f5/93561015578.pdfIn PDF document text
- http://unipell.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a1847d61491---17554104187.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=how+to+open+xbox+controllerPDF 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_off0000f36b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF36B	17032 bytes
SHA-256: `4e6fb807c1fbcfe7893c92b1efad3935a52cf66957625766fe81764adf5b8ca1`
`font_01_sfnt_off00011f7d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11F7D	10264 bytes
SHA-256: `cdb86becf8869529510ab235b08999a2006b6a4fa7d6eab36fd50ed7fd103258`
`font_02_sfnt_off0001367e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1367E	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

Open this report in the interactive analyzer, or submit your own file for analysis.