PDF malware analysis — malicious · 2cf094eadac8bb0b

MALICIOUS

PDF

85.3 KB Created: 2021-07-04 05:46:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12

MD5: 37714e050802ce6cbc15bf65a0c46b2e SHA-1: d06bd0f71789cb91e775fc4b029a895a9c507b0f SHA-256: 2cf094eadac8bb0bc77f10a8e379efca647ff782b36a95152ad8729d10133dba

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The presence of numerous external URIs and a link farm pointing to compromised WordPress upload directories suggests a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and URL patterns are indicative of a malicious document designed to redirect users to potentially harmful content.

Machine Learning

Nyx PDF Classifier malicious score 0.9956

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://synerhu.ru/uplcv?utm_term=asylum+based+green+card+processing+time+2020 PDF link annotation
- https://www.davinci.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160702e36d34c6---54574493266.pdfIn PDF document text
- https://www.sacda.org/wp-content/plugins/super-forms/uploads/php/files/27p62gnt17ns14i90qf27g1431/70929959634.pdfIn PDF document text
- http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/160de451d6cfc2---4191655264.pdfIn PDF document text
- https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6858ee10c3---18377618274.pdfIn PDF document text
- https://didacostruzioni.it/userfiles/file/tufetugodagogi.pdfIn PDF document text
- http://dinskayarealty.ru/media/file/79221230006.pdfIn PDF document text
- https://sgdivorcelawyers.com/wp-content/plugins/super-forms/uploads/php/files/14e586d0540b83503452a45157d48d95/tevetofavarena.pdfIn PDF document text
- http://playbabydoll.com/userfiles/file/zibiwesikakakitoturi.pdfIn PDF document text
- http://makaeximworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e0c3321528---rekuguzo.pdfIn PDF document text
- https://www.hungryalex.com/wp-content/plugins/super-forms/uploads/php/files/74448f0b347e174a032d4a3fc95664b2/38250364224.pdfIn PDF document text
- https://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160bca9814c5bd---bumexuvunabuleromiwugusuw.pdfIn PDF document text
- https://gtselect.fr/ckfinder/userfiles/files/37189270708.pdfIn PDF document text
- https://elicopter-de-inchiriat.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608d5da0b8a58---rafivod.pdfIn PDF document text
- http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/u0bl91p4gmt2u5en6cbk2h5md1/felinuvemo.pdfIn PDF document text
- https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097d3f3ca285---bibuzogenanumurumetunu.pdfIn PDF document text
- http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/1607c4177991ec---74578529603.pdfIn PDF document text
- https://m-co.de/wp-content/plugins/super-forms/uploads/php/files/502t4e2ela3nqmr2led9mdlro4/5599704337.pdfIn PDF document text
- https://kham.vn/userfiles/file/wuledu.pdfIn PDF document text
- https://www.litesourcenc.com/wp-content/plugins/super-forms/uploads/php/files/d24788742922d2268d92bf92c0106fab/42600544910.pdfIn PDF document text
- http://shannonlakeestates.org/fck_images/file/pajupuridopemega.pdfIn PDF document text
- http://banghaija.com/userfiles/file/2187301618.pdfIn PDF document text
- http://www.celso.org/download/95282509180.pdfIn PDF document text
- https://bxthirteen.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/60fe0356e7f8058342f631914c6fbf6f/pisoxalelufak.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_off0000e5de.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE5DE	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000fdf5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFDF5	11436 bytes
SHA-256: `1e80fa0f502da2b692178f5921e96e6033bda45a3e02cfa6e3aa5f3e29a83643`
`font_02_sfnt_off00011895.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11895	17360 bytes
SHA-256: `a7a05abc3477fb2c6e1b771ba21bf45af8952e71a46b52acf20ce292ee232865`

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