PDF malware analysis — malicious · 6c1385201b62fb44

MALICIOUS

PDF

91.3 KB Created: 2021-06-28 07:15:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05

MD5: 58273dc291033256a339f36f40885361 SHA-1: ef59a4842b9355ba5b0419577bf905dc9459bd06 SHA-256: 6c1385201b62fb440aed586caeba4de3a1df305c9012c9dd7e2bcbecb5d62dfd

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Numerous URLs were extracted, many pointing to compromised WordPress sites and disposable domains, suggesting a phishing or malware distribution campaign. The PDF structure and link farm characteristics further support this assessment.

Machine Learning

Nyx PDF Classifier malicious score 0.9924

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://inwebjor.ru/uplcv?utm_term=plural+number+of+tooth PDF link annotation
- http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/oqs07dgj8pg40g18fqqjp6qgb1/tusodam.pdfIn PDF document text
- http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160975abcaca89---gubed.pdfIn PDF document text
- http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/160720e0972ff8---17468622874.pdfIn PDF document text
- https://utilitydiscount.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4db5552e81---27557388566.pdfIn PDF document text
- https://fablab808.com/nbloom/fckuploads/file/lunelikuvaxezebenifopap.pdfIn PDF document text
- http://www.uvhk.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081c2b65f292---sejitujikiza.pdfIn PDF document text
- http://www.kocay.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1609b57b03705f---89690436120.pdfIn PDF document text
- http://dermalab.pl/userfiles/file/mobogibozetegefewifarowuv.pdfIn PDF document text
- https://www.hemoroidklinigi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607af18091863---96458054460.pdfIn PDF document text
- http://honda-vo.com/upload/file/verabosopog.pdfIn PDF document text
- http://sage-chem.com/image/files/20210606_034537.pdfIn PDF document text
- http://marymo.ru/uploads/files/nivurupalixada.pdfIn PDF document text
- https://oknoplus-omsk.ru/wp-content/plugins/super-forms/uploads/php/files/0248e5fe121f1f9e23b5ecc060f6687d/wenew.pdfIn PDF document text
- https://impariant-club.ru/wp-content/plugins/super-forms/uploads/php/files/31239b1a0a1d5ff1fa7a64d1a638669b/18651943779.pdfIn PDF document text
- http://chemonova.com/FCKeditor/file/81914932479.pdfIn PDF document text
- https://www.hagensmarketing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d1217a5667---woronotaterexisoz.pdfIn PDF document text
- https://beaumont-residence.com/wp-content/plugins/super-forms/uploads/php/files/9hv7opq6p8nd1rniu88t2eqq49/reduvunorupilafof.pdfIn PDF document text
- https://quickonboarding.com/wp-content/plugins/super-forms/uploads/php/files/246451af3e85c191356eab4d018a6a04/60788876934.pdfIn PDF document text
- http://bobiniauto.com/userfiles/file/dakomutana.pdfIn PDF document text
- http://www.dj-csnl.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609d06279665f---kabuku.pdfIn PDF document text
- http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160884f08aedcf---nukizopin.pdfIn PDF document text
- http://fatamorgana.fr/uploads/assets/file/31501324299.pdfIn PDF document text
- http://discoveryenglish.org/wp-content/plugins/formcraft/file-upload/server/content/files/16092828e8f5e8---29005416475.pdfIn PDF document text
- https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cb11a61669---7927085857.pdfIn PDF document text
- https://activepymes.com/pub/file/kazedusetasesilepamixijun.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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000ec39.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEC39	10460 bytes
SHA-256: `9de07ce1e96b71e25f13ecada595fd225cfe8b0ff14cf72a31f06254aa6d1cce`
`font_01_sfnt_off000103c1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x103C1	16876 bytes
SHA-256: `d777d6929e8a40cbba1fa41292058dcc251868c1127ee6986b8f15d9442b9f0a`
`font_02_sfnt_off00012fd1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12FD1	16764 bytes
SHA-256: `07eb698f8fa3922fadc50c5e17053ed0c67070ddcaafce74d5a275a9231583db`
`font_03_sfnt_off0001475c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1475C	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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