PDF malware analysis — malicious · c5dc71195c501dad

MALICIOUS

PDF

75.6 KB Created: 2021-12-01 06:20:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-28

MD5: 16ee54d0f62bc05b4dd9cef64eb906c3 SHA-1: 16b2bd3be3098b4a3eac502dc3306076410da8d8 SHA-256: c5dc71195c501dadfe11ea6ad0ba34c5606ebb0ee89517887a4449824200bcfc

156 Risk Score

Machine Learning

Nyx PDF Classifier malicious score 0.9942

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 http://quickfix-poland.com/wp-content/plugins/formcraft/file-upload/server/content/files/161323e7a392a6---zivubimotebetez.pdf In PDF document text
- http://mastervin.ru/files/file/rowujazu.pdfIn PDF document text
- http://itagqatar.zajeltel.com/itag/file/files/97128644147.pdfIn PDF document text
- http://radyoislam.com/resimler/files/4373602914.pdfIn PDF document text
- http://munnarteabungalows.com/userfiles/file/putodupesanotozuxitumol.pdfIn PDF document text
- http://jzssf.com/upload/file/150100501538.pdfIn PDF document text
- http://bobmeetin.com/media/galleries/files/2350207033.pdfIn PDF document text
- http://lsbwg.com/ckfinder/userfiles/files/20211018/1359041178.pdfIn PDF document text
- http://teamhead.net/userfiles/file/88347790584.pdfIn PDF document text
- https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/16168c6f2f1081---55754609829.pdfIn PDF document text
- https://forumsevens.com/images/file/54054931161.pdfIn PDF document text
- http://0965818789.com/CKEdit/upload/files/babisoburusolajara.pdfIn PDF document text
- https://www.hintonassociates.com/wp-content/plugins/super-forms/uploads/php/files/3c01986d005c7a1fa6bbc7e6be362a92/10226193721.pdfIn PDF document text
- https://binarbaidservices.com/public_html/userfiles/file/sofafa.pdfIn PDF document text
- https://sunriseinnjasper.com/nbloom/fckuploads/file/17923165685.pdfIn PDF document text
- http://ahjygjg.com/upload_fck/file/2021-12-1/20211201031106345719.pdfIn PDF document text
- https://learnrkbin.jugalbandiresearch.com/ckfinder/userfiles/files/22901947020.pdfIn PDF document text
- http://chornakorn-packing.com/ckfinder/userfiles/files/73197024549.pdfIn PDF document text
- https://samowar.ch/upload/file/saboxijudakiwaduvi.pdfIn PDF document text
- http://hw-power.com/uploads/ckfiles/files/61a044963d3d6.pdfIn PDF document text
- http://fitviewer.info/files/file/46993197192.pdfIn PDF document text
- https://skinrepublic.vn/webroot/img/files/rusogagopekebinazodoruru.pdfIn PDF document text
- http://feedproxy.google.com/~r/MbOu/~3/RC0zOYPQW8A/uplcv?utm_term=my+little+pony+coloring+book+pages+freePDF link annotation
- 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_off0000ae2b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xAE2B	10992 bytes
SHA-256: `fa095419646c156c2962bfdcbf462d6cc21fd52fedd5651f8ee7a4df3a184f26`
`font_01_sfnt_off0000c7a0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC7A0	16220 bytes
SHA-256: `fb642e1524b0812990f70f4ca0ae014abfb38661eb12adb08e00b0752cb8fadd`
`font_02_sfnt_off0000f199.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF199	16416 bytes
SHA-256: `cfa2c3fbce80cc5607e01af033b793d17c57c214fb1d96e845eedea48cccd336`
`font_03_sfnt_off00010837.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10837	16792 bytes
SHA-256: `eb322746d3ac072accb1c1a7b45cb2045771cccdb816429b7739c844d361bbfc`

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