PDF malware analysis — malicious · 42d9240294c139dd

MALICIOUS

PDF

86.2 KB Created: 2021-07-03 12:55:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16

MD5: 8758305ead238c832ead93447aa8d2bd SHA-1: b188fe7ecde1b0e8ece919fb9ef174c5f2c39297 SHA-256: 42d9240294c139dd560f59e2764b8da40593c02f35547684a0eb0f1a1a6d5028

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to numerous compromised websites, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to lure users to external, potentially harmful, content.

Machine Learning

Nyx PDF Classifier malicious score 0.9848

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://laborke.ru/uplcv?utm_term=causes+of+thyroid+problems+in+females PDF link annotation
- https://finatwork.com/userfiles/file/65771764128.pdfIn PDF document text
- http://hattingtoemrerogsnedker.dk/userfiles/file/digepuzaxojokidixip.pdfIn PDF document text
- https://thedestinbeachhouses.com/wp-content/plugins/super-forms/uploads/php/files/57ff1f1a34ddace75ebe78c665fa0528/86601674916.pdfIn PDF document text
- http://kaies.cn/upfiles/210602122241364969anwpgl.pdfIn PDF document text
- https://syteq-pro.com/userfiles/file/sagezefezupijafawuxola.pdfIn PDF document text
- https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/1b22da6fb07f08951f6189d155da1415/60271555928.pdfIn PDF document text
- http://www.magicapro.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607e9d53363f0---voroteralib.pdfIn PDF document text
- https://ancoraeducacion.com/images/47741883895.pdfIn PDF document text
- https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606cccbb3a867---mabedodofe.pdfIn PDF document text
- https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/16075bf4a7329e---36429401117.pdfIn PDF document text
- http://ingenermarket.ru/userfiles/87970457591.pdfIn PDF document text
- http://nct-vn.com/userfiles/file/terorivigopirawazad.pdfIn PDF document text
- http://grawerlik.pl/userfiles/file/jojokavopetolab.pdfIn PDF document text
- http://dermaktif.com/imgup/file/84693451002.pdfIn PDF document text
- https://siroyensao.com/upload/files/12303670012.pdfIn PDF document text
- https://www.gsccn.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607ca53511ff9---88700235482.pdfIn PDF document text
- https://amesmedicalservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073d4779210f---64291969704.pdfIn PDF document text
- https://csom.cz/wp-content/plugins/super-forms/uploads/php/files/54048334b2c706bc15dd22fd9633cff7/14648937579.pdfIn PDF document text
- https://takeorders.online/wp-content/plugins/super-forms/uploads/php/files/bmf1kene2c1electbh01t8vbt1/77583002927.pdfIn PDF document text
- http://immodraft.nrw/images/architekten_agentur_images_/file/44269305449.pdfIn PDF document text
- https://criteriacambio.com.br/wp-content/plugins/super-forms/uploads/php/files/7eqb0fc3bg49v99dlunfgjv278/94235703929.pdfIn PDF document text
- https://afd.me.uk/wp-content/plugins/super-forms/uploads/php/files/78mr6adrhe59vuggcombm2sshj/xipelulawijonaj.pdfIn PDF document text
- http://www.lifestaralberta.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092ba207ce35---9450295403.pdfIn PDF document text
- https://harpethvalleyhealth.com/wp-content/plugins/super-forms/uploads/php/files/44bda45cd3f27294e699edd556f1dda7/susojamerixewijikiziber.pdfIn PDF document text
- https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/e71a1f5490178306dedcd889b293ec78/83582814284.pdfIn PDF document text
- https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607cf1c4f12b2---16984329343.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_off0000ef53.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEF53	16332 bytes
SHA-256: `c69bf8a7363d247ba4a5333f7e3a0c9753f2248356d07de030f0cb8b72835d6a`
`font_01_sfnt_off0001198f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1198F	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off000131a6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x131A6	11148 bytes
SHA-256: `d26b53b39b821dda98808d9f2489f8e3192eb8bba7de0fdd866a8463280c6cbd`

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