PDF malware analysis — malicious · 709d45d7e7ef64aa

MALICIOUS

PDF

80.0 KB Created: 2021-09-03 05:17:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12

MD5: be822a4e1f0296a9ab06d00dbdc3da3d SHA-1: 4669f89ae4711b5167ac3a94ec336262383ad700 SHA-256: 709d45d7e7ef64aa335a6eba54c45cc09a1440f5dc8f7a068159969740746648

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. Heuristics identified it as a link farm, with many URLs pointing to compromised CMS uploads or disposable hosting. The embedded URLs and the nature of the link farm suggest a phishing or malware distribution attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9846

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://babywagen24.de/userfiles/file/17482409535.pdf In PDF document text
- http://ccforum.kr/uploads/file/1622170845.pdfIn PDF document text
- http://jonkmp.nl/img/cms/file/19614270200.pdfIn PDF document text
- https://solarconsulting.org/wp-content/plugins/super-forms/uploads/php/files/a2366deaa50a29b11c6cb687edc5f353/88601670075.pdfIn PDF document text
- https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4162e6e0e4---67668198419.pdfIn PDF document text
- http://ecbpolska.pl/wp-content/plugins/super-forms/uploads/php/files/deb73af99c1ee059d0966cab98dc3113/jeludopora.pdfIn PDF document text
- https://worldcastlive.com/userfiles/file/tewuti.pdfIn PDF document text
- http://www.idenet.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9057f1041---4279868462.pdfIn PDF document text
- https://aslimitada.com/userfiles/file/fawifefet.pdfIn PDF document text
- https://weinquartier.at/wp-content/plugins/super-forms/uploads/php/files/25171dcc3fe86d6ff98b8dafc66fce98/4870392457.pdfIn PDF document text
- https://krimgranit.ru/wp-content/plugins/super-forms/uploads/php/files/eb01c993a74c4a24c544fc77621ca91d/lukemawosonumufisari.pdfIn PDF document text
- https://home-consult.lu/userfiles/files/kakakivuderuzo.pdfIn PDF document text
- https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/1607afef9e7f52---dudinaxalevi.pdfIn PDF document text
- http://myphamlulanjina.com/upload/files/pekovoludajaberolu.pdfIn PDF document text
- http://beergolfers.com/blog/images/file/zefutefi.pdfIn PDF document text
- https://ibshospitals.com/userfiles/file/xugitufotigin.pdfIn PDF document text
- https://loctra.net/userfiles/file/widolosinukenoda.pdfIn PDF document text
- http://learnazia.com/fck/imagesfile/wujatutaxawipesigutul.pdfIn PDF document text
- http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071337aea7ed---37398992512.pdfIn PDF document text
- http://comicpapyrus.com/wp-content/plugins/super-forms/uploads/php/files/9af52ba7e13a436a2f17fd964e562ace/60956633698.pdfIn PDF document text
- http://beta-rc.com/upload/files/60482740072.pdfIn PDF document text
- https://www.khaosanpools.org/ckfinder/userfiles/files/duwefoluxawulisazigupevip.pdfIn PDF document text
- http://webbuilders.com/files/file/kegofejejefisos.pdfIn PDF document text
- http://ed-web.cz/userfilesfile/30843386539.pdfIn PDF document text
- https://www.gsccn.it/wp-content/plugins/formcraft/file-upload/server/content/files/160e90e87f091b---pugimozigovomo.pdfIn PDF document text
- https://yourlightingbrand.com/wp-content/plugins/super-forms/uploads/php/files/3d7107fea47d1a238a18fe295a953797/lafirebovefotofawinepi.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=market+economy+definition+pdfPDF 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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000d6d4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD6D4	10764 bytes
SHA-256: `d6020b1e9db38df5b03c0f4de591f2467c8acf40ce16156e6333417d25ed30dd`
`font_01_sfnt_off0000efa2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEFA2	16660 bytes
SHA-256: `4d992dc5e995acaafea68c3303f2139a94169f1eb77fff491d61336a5aa2d5b4`
`font_02_sfnt_off00011a6e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11A6E	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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