PDF malware analysis — malicious · dccc62ac56c212ad

MALICIOUS

PDF

91.2 KB Created: 2021-08-16 22:51:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27

MD5: 476a23759f3edf898ed4fb3f76b18aff SHA-1: 2e1b8d30dc248ee97b1474c2c1359935b5615d76 SHA-256: dccc62ac56c212adb71c2fffc2eae2893b56524c5459fe359e2b99f560e425f1

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous URLs that point to other PDF files hosted on compromised websites, suggesting a phishing or malware distribution scheme. The presence of multiple links to potentially malicious content indicates a broad attack pattern.

Machine Learning

Nyx PDF Classifier malicious score 0.9941

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://thesmithgrouphouston.com/wp-content/plugins/super-forms/uploads/php/files/d53651333837ce3c41b176aa3c58a001/vukebis.pdf In PDF document text
- http://puginternational.com/ckfinder/userfiles/files/58738412366.pdfIn PDF document text
- http://ckm-machinery.com/userfiles/files/lajemek.pdfIn PDF document text
- https://bloomeng.com/uploads/4523850416.pdfIn PDF document text
- https://www.hontoys.com.au/wp-content/plugins/super-forms/uploads/php/files/pf88cqt9huh1e1e89qltrmmma1/bokilare.pdfIn PDF document text
- http://koreaseals.com/ckfinder/userfiles/files/vogaripibokulu.pdfIn PDF document text
- http://gjbbang.com/userData/board/file/74339224652.pdfIn PDF document text
- http://www.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c4989f89b49---lexavixobob.pdfIn PDF document text
- https://xn--80aaa1anac6cg.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/a439242444bee3c77dfebd108dff1f0b/17063725708.pdfIn PDF document text
- http://becro-plast.hr/wp-content/plugins/formcraft/file-upload/server/content/files/16088168ab6c9f---nusorarewimuvinuvexevili.pdfIn PDF document text
- https://bmw-zona.ru/uploads/file/973113921.pdfIn PDF document text
- https://www.lang-mayer.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609db246a7f0b---medirisuralumidegi.pdfIn PDF document text
- http://manufim.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160ab81838db2a---zuvezenojopi.pdfIn PDF document text
- http://train-in-japan.com/images/blog//file/38260666902.pdfIn PDF document text
- http://www.amanuttarakhand.org/ckfinder/userfiles/files/90964484294.pdfIn PDF document text
- http://4bx.pl/public/file/tevaretowitol.pdfIn PDF document text
- http://zxsolar.com/d/files/niritimurelulumaver.pdfIn PDF document text
- http://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160a0c511c5549---63673437067.pdfIn PDF document text
- https://bawwabatrizq.com/userfiles/file/dolumowupub.pdfIn PDF document text
- http://circolonauticofavignana.it/userfiles/files/783318772.pdfIn PDF document text
- https://alamansyria.com/userfiles/file/77337926275.pdfIn PDF document text
- http://gistfamilyreunion.com/clients/8/8c/8cbf0a40baaab9dd4734ff2cdbb1e120/File/mikapafabekefigaz.pdfIn PDF document text
- http://vankouwenenmastop.nl/UserFiles/file/2769657859.pdfIn PDF document text
- http://www.iso-clean.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160757ab10ffe0---18547955891.pdfIn PDF document text
- http://bungefamily.com/clients/5233/File/ziniro.pdfIn PDF document text
- https://htfcompact.com/wp-content/plugins/super-forms/uploads/php/files/d1d9979fea6500ba602ffe84a379e545/68496808961.pdfIn PDF document text
- https://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607375d796b7a---lijekelaxiziv.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=glencoe+algebra+1+2014+textbook+pdfPDF link annotation
- https://lapdonline.org/file/wotezofukutasaju.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_off0000fd3d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFD3D	17296 bytes
SHA-256: `9ac649b63e86424c06d6dba96376445689e403c70bf669629549786b85f8daaa`
`font_01_sfnt_off00012a21.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12A21	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00014238.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x14238	11280 bytes
SHA-256: `c02463f17c422e6fa9bad18d4efa3922229ee01d7728fd23cbf4213b0357c7b3`

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