PDF malware analysis — malicious · 67af72241535e361

MALICIOUS

PDF

98.0 KB Created: 2021-06-29 01:11:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07

MD5: d94ad01a9cb9b11ec3f52b423c59f24b SHA-1: 9a00d16e051c644f1023efa5382cad5748c328b5 SHA-256: 67af72241535e3610f76958bf854edfff2aff8e689a23cc4d13cc9d79117a251

176 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains numerous links to other PDFs hosted on compromised websites, indicating a link farm designed to obscure the true malicious destination. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were directly extracted, the presence of embedded URLs and the overall structure point towards a phishing lure, potentially leading to further compromise.

Machine Learning

Nyx PDF Classifier malicious score 0.9784

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
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.
Callback phishing phone lure medium SE_CALLBACK_LURE

Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
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://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/qf0shauemoimrgm0htl8gk0l45/pejakawekewofakilikil.pdf In PDF document text
- http://jagatjyotischool.org/jagatjyotischool/userfiles/file/42803788295.pdfIn PDF document text
- https://tkpmission.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b36ceec0dc7---xixako.pdfIn PDF document text
- https://krimgranit.ru/wp-content/plugins/super-forms/uploads/php/files/dd968db79c3c7a073e34a2a7c8783c58/39637320265.pdfIn PDF document text
- http://aisef.org/uploads/userfiles/file/file/wojuvowakuvesof.pdfIn PDF document text
- http://www.rodnolespropertymanagement.com/siteuploads/editorimg/file/94269015539.pdfIn PDF document text
- https://spencershaulageltd.co.uk/wp-content/plugins/super-forms/uploads/php/files/569371378f53d6060587f1e7f7fbe384/26413512895.pdfIn PDF document text
- https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/ab187c43b9e0b2638cb4208491d982bd/xenabesoxen.pdfIn PDF document text
- https://www.alapan.org/fckimages/file/55874329570.pdfIn PDF document text
- http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/160726316438f9---45477217304.pdfIn PDF document text
- http://goldartline.ua/userfiles/file/98158170472.pdfIn PDF document text
- https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/11c6f59d34b28ac1d9b679077534650c/96170188015.pdfIn PDF document text
- http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160752b3bbde13---maloveteval.pdfIn PDF document text
- http://stellar-toys.com/ckfinder/userfiles/files/24790310316.pdfIn PDF document text
- http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fff76c0691---voxagimozarikufubalew.pdfIn PDF document text
- https://www.gs-gleichmann.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606c8aebe65a9---79644651362.pdfIn PDF document text
- https://proektasis.gr/admin/spaw2/uploads/files/lulerawivakazaviva.pdfIn PDF document text
- http://kiavysocina.cz/UserFiles/File/1616515244.pdfIn PDF document text
- http://shinserviceodi.ru/wp-content/plugins/super-forms/uploads/php/files/290510106b28772afe9078f278c0ffe6/torijinipusibenomexo.pdfIn PDF document text
- http://qunjl.com/userfiles/files/11026398891.pdfIn PDF document text
- https://kvkumariajnkvv.org/singhania/downloads/file/kewomejirabejotumom.pdfIn PDF document text
- https://frasertechno.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b34c47d6bd---70354439091.pdfIn PDF document text
- http://www.northeastmarquees.com/wp-content/plugins/super-forms/uploads/php/files/aa92292bd402aff372c69a7aec89331f/217915141.pdfIn PDF document text
- https://kuechentreff-schmid.de/wp-content/plugins/super-forms/uploads/php/files/ohq156usdofvqnmkqf4veskjrf/95248164282.pdfIn PDF document text
- https://gccpay.net/wp-content/plugins/super-forms/uploads/php/files/7d9d3515475dde2558e643bb80d572c9/67250023151.pdfIn PDF document text
- http://tikatalog.sk/_files/file/18140377951.pdfIn PDF document text
- http://hjtech.org/admin/upfile/file/76993751205.pdfIn PDF document text
- http://allasclub.com/campannas/file/78880964113.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=sample+marriage+biodata+format+in+word+free+downloadPDF 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_off00011aa5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11AA5	17696 bytes
SHA-256: `c18de29342d60f7fbe783cb841492c4b2a1ea6162dc275ccc30752ada840c04c`
`font_01_sfnt_off000148f7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x148F7	10976 bytes
SHA-256: `df61021f4821802e80934522e13660840c019f3494c87f24245a09691b42ba91`
`font_02_sfnt_off00016209.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x16209	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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