PDF malware analysis — malicious · 3cf6071e07f6ac1d

MALICIOUS

PDF

83.8 KB Created: 2021-09-16 23:02:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23

MD5: 1e614183a3c2da867439c6b21ebfe90e SHA-1: 12c05b24159ca62602b175fdb493b6b5f036007b SHA-256: 3cf6071e07f6ac1dda0f5ced3b19e382654fc90382758dce437072198cd33f99

146 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF document contains numerous external links, many of which are hosted on disposable domains and appear to be part of a link farm designed to redirect users to malicious content. The heuristic 'ML_NYX_PDF_MALICIOUS' and ClamAV detection strongly indicate malicious intent. The presence of embedded URLs and the overall structure suggest a phishing or malware distribution scheme, likely initiated via spearphishing.

Machine Learning

Nyx PDF Classifier malicious score 0.9977

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.
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://wastran.ru/uplcv?utm_term=secret+neighbour+download+android PDF link annotation
- http://ambulatorioveterinariorigolon.eu/userfiles/files/ligimimada.pdfIn PDF document text
- http://j1ent.com/userfiles/file/20210916055904.pdfIn PDF document text
- http://htwy.com/upload/file/81440627668.pdfIn PDF document text
- https://www.hosotte.com/ckfinder/userfiles/files/12482616765.pdfIn PDF document text
- http://unicorn-furnitures.com/d/files/22778550580.pdfIn PDF document text
- http://itaxabc.com/userfiles/file/20210911162606_164812224.pdfIn PDF document text
- http://fujavietnam.com/images/Download/55691736466.pdfIn PDF document text
- https://tradingphrases.com/userfiles/files/jemovopefewezavesek.pdfIn PDF document text
- https://ambalatender.com/upload/files/zopubokisop.pdfIn PDF document text
- https://xosobacninh.vn/webroot/img/files/nagevug.pdfIn PDF document text
- http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141471da4bbb---30607355022.pdfIn PDF document text
- https://mimpishio2bet.net/contents/files/74284813627.pdfIn PDF document text
- http://ozdermusavirlik.net/userfiles/file/salemapazejoxatezuzos.pdfIn PDF document text
- http://jumpinfit.it/userfiles/files/90497930749.pdfIn PDF document text
- https://braveathlete.net/geektic/files/92934101180.pdfIn PDF document text
- https://www.auto-ecole-rive-droite.fr/ckfinder/userfiles/files/padafolomi.pdfIn PDF document text
- http://chieusangducphat.com/uploads/userfiles/file/6450451943.pdfIn PDF document text
- https://clinicaabrahaoosta.com.br/ckfinder/userfiles/files/72626188813.pdfIn PDF document text
- http://belly.bpv.su/content/files/files/xemonak.pdfIn PDF document text
- http://gloria-eurex.com/images/blog/file/zodoxoxixi.pdfIn PDF document text
- http://associatedreclaimed.com/userfiles/files/80970922509.pdfIn PDF document text
- http://nasfthr.com/userfiles/file/jusovejijevokoxilikato.pdfIn PDF document text
- http://yusungchart.com/userData/board/file/99190159247.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_off0000db73.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDB73	10884 bytes
SHA-256: `a9cae552c7e893cce3f80bb0809031edf0ca5a190f92cce9d7919b3ef6a86a4b`
`font_01_sfnt_off0000f45e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF45E	20220 bytes
SHA-256: `f9df9871c416418b8266c297094ccf8cde235f3cd8d4945a4b72e65c09679140`
`font_02_sfnt_off0001292f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1292F	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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