PDF malware analysis — malicious · 92371d3d9492495e

MALICIOUS

PDF

83.7 KB Created: 2021-09-13 23:30:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14

MD5: 38060b23069928d3aa26a4b0902b9f05 SHA-1: 11ce1834b03076dbedb6644027a2206c43cce69f SHA-256: 92371d3d9492495e53c46478b53dd8bd9c9f0deb41a025e9599fad0205784261

196 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1539 Steal or Harvest Credentials

The file was detected as malicious by ClamAV and an ML classifier, and exhibits characteristics of a credential harvesting lure. It contains numerous external links, many pointing to disposable hosting or compromised CMS uploads, suggesting an attempt to redirect users to phishing sites. The presence of PDF_URI and SE_MFA_LURE heuristics strongly indicates a phishing campaign aimed at stealing credentials or abusing multi-factor authentication mechanisms.

Machine Learning

Nyx PDF Classifier malicious score 0.9951

Heuristics 7

ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
MFA / one-time-code harvesting lure high SE_MFA_LURE

Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
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://drafthe.ru/uplcv?utm_term=android+from+google PDF link annotation
- http://citysoupsbellevue.com/uploads/files/8475574104.pdfIn PDF document text
- http://aedjtjdshbf.pretty-match.com/upload/files/wakumipo.pdfIn PDF document text
- http://seteo-dechets.com/images/file/jisarosoxobetixubaninujij.pdfIn PDF document text
- http://mid-europe-ex.com/images/blog/file/bisigokimitazusuwegigega.pdfIn PDF document text
- https://watfordfairtrade.org/app/webroot/img/files/65088668692.pdfIn PDF document text
- http://vimbark.sk/editor_uploads/files/rozapesixib.pdfIn PDF document text
- http://9y.bfage.com/upload/files/20210907101655.pdfIn PDF document text
- https://swimproject.eu/wp-content/plugins/super-forms/uploads/php/files/92b9c6b9269558956d05f0a1d9a51fd9/7499684758.pdfIn PDF document text
- http://195exim.com/datas/files/lamevizuf.pdfIn PDF document text
- https://channeloflove.com/ckfinder/userfiles/files/54697958684.pdfIn PDF document text
- https://khoahoc.timviec365.com/picturesfiles/fejolixat.pdfIn PDF document text
- https://spcinternational.in/ckfinder/userfiles/files/56524047229.pdfIn PDF document text
- http://narzedziascierne.eu/Upload/file/86019638533.pdfIn PDF document text
- https://towa-aaa.jp/userfiles/file/nasosuxibufikakesezesovi.pdfIn PDF document text
- https://faktxeber.ru/resimler/files/9416901227.pdfIn PDF document text
- http://yule-sign.com/upload/editor/file/20210909135757.pdfIn PDF document text
- http://print-printonline.com/ckfinder/userfiles/files/lotelukoz.pdfIn PDF document text
- https://www.assofmt.org/ckfinder/userfiles/files/gifujasetulu.pdfIn PDF document text
- http://eternalcycle.com/FCKFiles/file/viwivukiloliluzaxagoraxam.pdfIn PDF document text
- https://adminico.nl/userfiles/file/6329280352.pdfIn PDF document text
- http://jdjcnc.com/upfolder/e/files/20210906084339.pdfIn PDF document text
- https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/161301393004b4---83296676897.pdfIn PDF document text
- https://tkpmission.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613f0676ac892---vuwijil.pdfIn PDF document text
- http://ecovn.vn/uploads/news_file/33110830087.pdfIn PDF document text
- http://pickup-ws.com/userfiles/files/15140904333.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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000e52f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE52F	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000fd41.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFD41	17820 bytes
SHA-256: `d5acb009b1518b0e799e477e8080c6ab2ddc0133d36aa93d334bc76a6a98cab2`
`font_02_sfnt_off00012b0f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12B0F	10248 bytes
SHA-256: `e66e0227a8f2631d3910ea5c8192f443cc1ab80b245636e29fb921d1021d394c`

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