PDF malware analysis — malicious · e6360d34f8d39207

MALICIOUS

PDF

81.4 KB Created: 2021-09-11 19:59:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31

MD5: eedc864ec791b484700ad6e251a7ba2c SHA-1: b8781442676c2ec4d19ab9ca1fbd5bf938b1da09 SHA-256: e6360d34f8d392078884f33584bd0102d621360ce9618da5233e4f20d6742163

146 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF document was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The presence of numerous embedded URLs, many pointing to potentially malicious domains, suggests a phishing or malware distribution scheme. The 'SE_QR_LURE' heuristic indicates the document may instruct users to scan a QR code, a common tactic in phishing campaigns to redirect users to malicious sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9955

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
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.
QR-code redirect lure medium SE_QR_LURE

Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
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://rh-h1tapi-turbo.com/contents/files/tumunojewebexogatuwugeri.pdf In PDF document text
- http://citra.cl/userfiles/file/jolukisuvebiputoladexoki.pdfIn PDF document text
- https://www.corpeverest.com/ckfinder/userfiles/files/gagakirowibaferazurinona.pdfIn PDF document text
- http://korean-school.hu/hangul/userfiles/file/tujejibuwizepu.pdfIn PDF document text
- http://sunnyten.net/userData/board/file/sunujemaxujevologes.pdfIn PDF document text
- http://dlshixiang.com.cn/ckfinder/userfiles/files/gixabawejo.pdfIn PDF document text
- https://nieruchomosciprzetargi.pl/files/file/99838052067.pdfIn PDF document text
- http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1612f89df00736---kubunalu.pdfIn PDF document text
- http://wcsps.com.tw/ckfinder/userfiles/files/japuzawepo.pdfIn PDF document text
- http://perfekt-dom.pl/designhome/admin/userfiles/file/70302857560.pdfIn PDF document text
- http://kooijobs.in/ckfinder/userfiles/files/givivinano.pdfIn PDF document text
- https://gsacademy.ge/uploads/files/woteditezadudelutidaziv.pdfIn PDF document text
- http://esen-life.com/userfiles/file/57434501798.pdfIn PDF document text
- http://ilkyoukais.com/Images/Media/files/lopakevipijik.pdfIn PDF document text
- https://nic-irq.com/userfiles/files/vinenas.pdfIn PDF document text
- https://chupwo.com/editor_upload/file/39057542035.pdfIn PDF document text
- https://cokhivietuc.com/img-vietuc/files/41369975967.pdfIn PDF document text
- http://metrocars.london/survey/userfiles/files/dizunavetij.pdfIn PDF document text
- http://cyclad.org/UserFiles/file/17824931733.pdfIn PDF document text
- http://fence-alarm.com/userfiles/files/buduzoj.pdfIn PDF document text
- http://hyosangjo.com/userfiles/file/20210912015451.pdfIn PDF document text
- https://giraffeng.net/infodaily/gen-ckfinder/userfiles/files/setamelilimogewuvel.pdfIn PDF document text
- https://armenia4d.com/contents/files/68574118806.pdfIn PDF document text
- http://sgyscom.com/upload_fck/file/2021-9-10/20210910121107752864.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=how+to+scan+qr+code+using+phone+cameraPDF 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_off0000d699.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD699	11240 bytes
SHA-256: `728059bb1c11b389bd0630e9260a0b6595495128d9d105ddb18f0849c6d35e02`
`font_01_sfnt_off0000f046.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF046	18612 bytes
SHA-256: `11eb921fa34b39260339b488274b250a416035746bd90031ea7026075609bfce`
`font_02_sfnt_off00011fec.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11FEC	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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