PDF malware analysis — malicious · b0b7b1862e093f72

MALICIOUS

PDF

83.5 KB Created: 2021-09-21 05:44:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27

MD5: 7371addc76e9b75998ea291cf8209c45 SHA-1: b39bd517d8f3cd51c9b1ab97c96e1c791fff1dbc SHA-256: b0b7b1862e093f72724fb9a405734272279406a55327a35e31903a652e0f0e40

166 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The sample is a PDF file flagged by ML classifiers and ClamAV as malicious. It contains numerous external URIs and is identified as a link farm, suggesting it's part of a phishing or malware distribution scheme. The 'SE_CLIPBOARD_COMMAND_LURE' heuristic indicates the document likely instructs the user to copy and paste commands into a shell, a common technique for executing downloaded payloads. The presence of multiple PDF_URI entries points to a broad distribution effort.

Machine Learning

Nyx PDF Classifier malicious score 0.9956

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
Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE

Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
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://wastran.ru/uplcv?utm_term=telegram+latest+version+apk+download PDF link annotation
- https://medicabg.com/uploads/wysiwyg/files/zozigawozutedujaje.pdfIn PDF document text
- http://reszke.pl/fckeditor/editor/filemanager/connectors/php/file/46909631378.pdfIn PDF document text
- https://horizontire.com/userfiles/file/fakelilavuz.pdfIn PDF document text
- http://pamatudarbai.lt/ckfinder/userfiles/files/8352237362.pdfIn PDF document text
- https://siemreaptraveltours.com/userfiles/file/11831256560.pdfIn PDF document text
- http://lifecare4all.com/upload/files/24786971706.pdfIn PDF document text
- http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16140ff21893a7---40961156067.pdfIn PDF document text
- http://lerucherdesanges.fr/userfiles/file/91553002594.pdfIn PDF document text
- http://solamsys.com/userData/board/file/zekedi.pdfIn PDF document text
- http://majedalkarkhi.com/pics/file/tevotuguwagi.pdfIn PDF document text
- https://masukpt2.com/contents/files/2461988349.pdfIn PDF document text
- http://jts-electrical.co.uk/ckfinder/userfiles/files/badupij.pdfIn PDF document text
- http://keyflounge.nl/userfiles/file/32339576951.pdfIn PDF document text
- http://naitikfashions.com/ckfinder/userfiles/files/34989475585.pdfIn PDF document text
- http://union.travel/ckfinder/userfiles/files/63670865140.pdfIn PDF document text
- http://ugrctrani.it/userfiles/files/tepugovudulixepenezi.pdfIn PDF document text
- http://mail-business.ru/uploads/file/62155799835.pdfIn PDF document text
- http://nepalbestcargo.com/userfiles/file/gumadunutixuveluxexumite.pdfIn PDF document text
- http://decaiyun.com/upload/file/210906025842077793igabct45f294.pdfIn PDF document text
- http://suncitygroup.ir/basefile/suncitygroupir/files/29615564355.pdfIn PDF document text
- http://synerfreight.com/syner_upload/images/files/65898221345.pdfIn PDF document text
- https://cokhivietuc.com/img-vietuc/files/vesupov.pdfIn PDF document text
- http://qianxish.com/ckfind_image/files/49882789723.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_off0000df38.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDF38	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000f74a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF74A	18172 bytes
SHA-256: `e7117bc33687f2a9c5947125bdd2eb55a328cd1c94b30964a0f8b71ac1e4b52a`
`font_02_sfnt_off00012774.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12774	10940 bytes
SHA-256: `f7574e54727ceb3b8303c951a701d627279db46d85f541d6cdfc55644d91dbe9`

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