MALICIOUS
156
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
The file is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. Heuristics reveal it functions as a link farm, directing users to multiple compromised or disposable hosting sites, such as 'synerhu.ru' and 'allineers.netlovestories.com'. The presence of external URIs and link farm characteristics strongly suggests a phishing or malware distribution campaign, likely initiated via spearphishing attachment.
Machine Learning
- Nyx PDF Classifier malicious score 0.6200
Heuristics 6
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ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTIONClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
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PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARMPDF 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.
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Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARMSmall 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.
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External URI info PDF_URIPDF contains an external URL action
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PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILEDThe cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
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Embedded URL info EMBEDDED_URLOne 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://synerhu.ru/uplcv?utm_term=office+365+work+login PDF link annotation
- http://allineers.netlovestories.com/upload/files/venafonelaluvobirubikap.pdfIn PDF document text
- http://salonlomi.pl/wp-content/plugins/formcraft/file-upload/server/content/files/161306c1898a13---88341994247.pdfIn PDF document text
- http://myslizdrave.com/soubory/15692369504.pdfIn PDF document text
- https://www.xtremefitness.com.au/application/third_party/ckfinder/userfiles/files/xaberorevo.pdfIn PDF document text
- https://osakaav.com/userfiles/files/37039451400.pdfIn PDF document text
- https://psg66.ru/admin/ckfinder/userfiles/files/refoxes.pdfIn PDF document text
- http://slovbau.sk/test/userfiles/file/nazamosoza.pdfIn PDF document text
- http://buffagiuseppeinfissi.com/userfiles/files/dobojomufev.pdfIn PDF document text
- https://tasleemdubai.com/userfiles/files/suwunovefefimatemer.pdfIn PDF document text
- http://jingmingtai.com/filespath/files/20210908152123.pdfIn PDF document text
- http://xetaihyundai.net/upload/files/95285289259.pdfIn PDF document text
- https://nikken-engineer.jp/export/sd205/www/jp/r/e/gmoserver/8/6/sd0748886/nikken-engineer.jp/fckeditor/upload/file/berapedofukodalapugo.pdfIn PDF document text
- https://tennis94.fr/img/pics/files/49849146263.pdfIn PDF document text
- http://waetsukai.jp/system/ckfinder/userfiles/files/watikud.pdfIn PDF document text
- http://sakirnoopo.ru/wp-content/plugins/super-forms/uploads/php/files/dfb8e69ee17415893bd590cbec00685c/goziridofolefevoti.pdfIn PDF document text
- http://rapabzenec.cz/obrazky/files/5083483699.pdfIn PDF document text
- https://gesema.com/UserFiles/file/pemixa.pdfIn PDF document text
- http://moscow-vernisage.com/files/files/61156907727.pdfIn PDF document text
- http://anticacarsulaeborzoi.eu/userfiles/files/sinariwizapujogadebiwisim.pdfIn PDF document text
- http://samtekelektrik.com/files/83563322002.pdfIn PDF document text
- https://readxyz.com/wp-content/plugins/super-forms/uploads/php/files/6f2f2da8bad62764e2305067279edf6e/kaxabikorabigiwuvilafonol.pdfIn PDF document text
- http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/16135c721f2d62---wulekakejakiruseboke.pdfIn PDF document text
- http://velapower.com/glwh/UploadFile/file/2021090513295073499.pdfIn PDF document text
- https://luatsubienhoa.com/upload/ck/files/39441115110.pdfIn PDF document text
- https://portalbime.com/UploadedFiles/New/file/wepogugituwakuvivil.pdfIn 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_off0000debf.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xDEBF | 10760 bytes |
SHA-256: dba035dc4e3a5bf0ebea8a6f77edf6fe0509c852d1996f07dcfbddda68cb1de8 |
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font_01_sfnt_off0000f7b7.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xF7B7 | 16792 bytes |
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
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font_02_sfnt_off00010fc9.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x10FC9 | 18328 bytes |
SHA-256: efa21d70130cf46fde0422600fe16991439bb9c8934b99b74902cf876c2a4ac4 |
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