PDF malware analysis — malicious · 240cc24a4d44501f

MALICIOUS

PDF

82.3 KB Created: 2021-07-05 19:20:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14

MD5: ec53feb3f446f5fd16694d71c469517b SHA-1: 3004c9b198205da3c2d345fdc0eb3475ed2b061b SHA-256: 240cc24a4d44501ff40e8b94e65f4cc4e3c66f67a2086322c9c659ec0ba139c6

164 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to external sites, many hosted on compromised WordPress installations, suggesting a phishing or malware distribution scheme. The presence of a 'download button' heuristic further supports the lure of downloading content, likely a payload.

Machine Learning

Nyx PDF Classifier malicious score 0.9833

Heuristics 7

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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.
Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON

Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
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://garglob.ru/uplcv?utm_term=latest+pdf+converter+software+free+download PDF link annotation
- https://terravistahometeam.com/wp-content/plugins/super-forms/uploads/php/files/22f136e3a25b558106429e5991918b7a/wajibetosubusapixe.pdfIn PDF document text
- http://md-servicios.com/userfiles/file/nuwod.pdfIn PDF document text
- http://stkvn.ru/wp-content/plugins/super-forms/uploads/php/files/8e863e0ad90412582426e130ccf94359/47118530342.pdfIn PDF document text
- https://discoverapartmentsforrent.com/wp-content/plugins/super-forms/uploads/php/files/54801839f9dcdedbb0c912cecb783e88/vajasusazaxodijuwufukunom.pdfIn PDF document text
- https://peptidturkiye.com/ckfinder/userfiles/files/49704034205.pdfIn PDF document text
- https://ivanamihic.com//files/bunukikofodekotekenotobi.pdfIn PDF document text
- https://slavica.ru/wp-content/plugins/super-forms/uploads/php/files/dca4bd8de884af4e35d1587f936590f2/fodurisas.pdfIn PDF document text
- https://www.fmworks.com.tr/wp-content/plugins/super-forms/uploads/php/files/b7cm6gpoao92cd0d2ebta9dksp/30003536628.pdfIn PDF document text
- http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/1606cace71e35e---65338956005.pdfIn PDF document text
- http://szao-spb.ru/images/news/file/duwokimovajujegebuxeju.pdfIn PDF document text
- https://thetitangroup.ca/wp-content/plugins/super-forms/uploads/php/files/289c18793c2474a2e964778c53cd51e8/bizedariparivezofatame.pdfIn PDF document text
- http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072ab19043a9---27097785817.pdfIn PDF document text
- http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1608c9449941ad---99278838145.pdfIn PDF document text
- https://indacphuc.com/wp-content/plugins/super-forms/uploads/php/files/hpj37hdqv1ao1b2l8usjquo9q5/gibagez.pdfIn PDF document text
- https://floorco.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/08a02121aa5b5d90f9804b3ce30cc9c9/11658850808.pdfIn PDF document text
- http://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607ac9da45860---pixususisavenu.pdfIn PDF document text
- https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160788dc570683---78570880315.pdfIn PDF document text
- https://imapcb.org/wp-content/plugins/super-forms/uploads/php/files/u72mcf9a8md6j310p5089vlkd7/41861793811.pdfIn PDF document text
- https://certifiedmoversinc.com/wp-content/plugins/super-forms/uploads/php/files/db95f2478be16b6dcef2ab5d2a86ba77/sasapuki.pdfIn PDF document text
- http://writtenmail.com/upload_images/file/kifasazero.pdfIn PDF document text
- https://svetpoznaniyaonline.ru/wp-content/plugins/super-forms/uploads/php/files/51f6c636605adcf36497fad246987eda/rulomasitanajifo.pdfIn PDF document text
- http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160add8410a7fd---morewamutuwelixanageto.pdfIn PDF document text
- http://medicapoland.pl/uploaded/file/powejovuruwifoven.pdfIn PDF document text
- http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/6dqta07n457npj89vr6p9u3nt2/lopexibapamosenolebofas.pdfIn PDF document text
- http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b68db22664---1036610288.pdfIn PDF document text
- https://congchung7.com/upload/file/xovexajarokamutolexuxen.pdfIn PDF document text
- http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/160851ac2a4ff0---73371102434.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_off0000de92.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDE92	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000f6a9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF6A9	10628 bytes
SHA-256: `7a7405079ef4b36250aa50f470bcd7cac2209c55c139e298adeeaa93bb150ba1`
`font_02_sfnt_off00010f30.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10F30	16952 bytes
SHA-256: `471d2905f2467f9070ddb94465d2e4446979895b1fbe37a694821c9759daac75`

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