PDF malware analysis — malicious · 148f825b8f4176f5

MALICIOUS

PDF

86.9 KB Created: 2021-06-27 21:59:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14

MD5: 830f1dee30dbb88e8afbc8d579521046 SHA-1: 4edb9179076c561831ccbe72fceb131d837b08fb SHA-256: 148f825b8f4176f5dc60e5a93b5ff6329b6cbbaf4dd44e1938fe04ad4fa9a29f

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was identified as malicious by ML classifiers and ClamAV, indicating it is a phishing or malware distribution attempt. It functions as a link farm, with numerous embedded URLs pointing to compromised websites and disposable domains. The primary purpose appears to be directing users to malicious content, potentially for credential harvesting or further payload delivery.

Machine Learning

Nyx PDF Classifier malicious score 0.9835

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://7gking.tw/upload/files/vubad.pdf In PDF document text
- http://www.sevenchurchestour.net/seven/wp-content/plugins/formcraft/file-upload/server/content/files/160d3df6f49c1a---kagurojazuzabig.pdfIn PDF document text
- http://orderleesushi.com/uploads/files/39380315300.pdfIn PDF document text
- https://shinyjewellers.com/wp-content/plugins/super-forms/uploads/php/files/5gefchcfmqht0nmg2g31obav60/mejemebifilurivuzipu.pdfIn PDF document text
- http://tizianaiberti.it/userfiles/files/55300190622.pdfIn PDF document text
- http://erbilsunhotel.com/wp-content/plugins/super-forms/uploads/php/files/vr0am9v162aeimbb0mj3k2t950/kitogosodut.pdfIn PDF document text
- http://goodwill.as/userfiles/file/22694921376.pdfIn PDF document text
- http://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c3fc2e3ff1a---32532745408.pdfIn PDF document text
- https://morethancleaningservices.com/wp-content/plugins/super-forms/uploads/php/files/e9576bf4bccf76cb092c293e189ec5b0/pixikixonaxosawinev.pdfIn PDF document text
- http://re-view.online/fckFiles/file/sexatezewiwaduviwonesulur.pdfIn PDF document text
- https://www.histoiresdegroupes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ecbfb94f78---dajuzefujolarajumivabo.pdfIn PDF document text
- https://dobre-akce.cz/media/files/file/revaxuli.pdfIn PDF document text
- https://www.beewellrx.com/wp-content/plugins/super-forms/uploads/php/files/tmp/xufudujinerus.pdfIn PDF document text
- http://akcjonariusz.com/UserFiles/file/gegujesekaxapoxokebuf.pdfIn PDF document text
- https://duext.com/wp-content/plugins/super-forms/uploads/php/files/a1ff4b5299d9a200c6a151c68bde3593/32273921869.pdfIn PDF document text
- https://kakvkusno26.ru/wp-content/plugins/super-forms/uploads/php/files/944a46dddde5d96f5aba38cb2758fb9e/lopinefi.pdfIn PDF document text
- http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a89f8b865b7---24048252576.pdfIn PDF document text
- https://mattweidnerlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c259ed9f2cf---62104355984.pdfIn PDF document text
- https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607722873e04a---69521269220.pdfIn PDF document text
- http://piau-po21inn.com/CKEdit/upload/files/34855350293.pdfIn PDF document text
- http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607af73305be5---dobabujitagodug.pdfIn PDF document text
- https://www.beewellrx.com/wp-content/plugins/super-forms/uploads/php/files/tmp/41152506644.pdfIn PDF document text
- https://eyestech.in/wp-content/plugins/super-forms/uploads/php/files/msrdo0jn6rgfi0gc6n5dhr13u0/zizadujaxuba.pdfIn PDF document text
- http://childhood-matters.com/clients/49507/File/bimudip.pdfIn PDF document text
- http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160d26d4084a3a---55582635824.pdfIn PDF document text
- http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7327f05664---64446281797.pdfIn PDF document text
- https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/160afa0db5d41d---57563508343.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=nucleus+in+plant+and+animal+cellsPDF 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_off0000f25b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF25B	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off00010a72.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10A72	10532 bytes
SHA-256: `36b6caa7f5fd862833315fc4efda653b864b60d74d8cdbdd5cd43a0c3e726c1b`
`font_02_sfnt_off00012269.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12269	16776 bytes
SHA-256: `f6a5d5aed858c9f45ed9aef8e7f626f539aa9fb30156fdb3444ded0b7502cbfc`

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