PDF malware analysis — malicious · 22d5e3bfa07038c8

MALICIOUS

PDF

87.9 KB Created: 2021-09-12 21:45:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07

MD5: f3b95cf10a839d0ec10309aec971164e SHA-1: 9b17bd75952d0eb37d03a7c88133e39ae62a0980 SHA-256: 22d5e3bfa07038c8f46265a2edc9c494dc84cae39145ce494c64afe2d1f103cd

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, with one specifically identified as part of a link farm on disposable hosting, suggesting a phishing or malware distribution scheme. The presence of embedded JavaScript, though not fully detailed, further supports the potential for malicious execution within the PDF.

Machine Learning

Nyx PDF Classifier malicious score 0.9922

Heuristics 5

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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.
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://synerhu.ru/uplcv?utm_term=boboiboy+adudu+attacks+2 PDF link annotation
- http://xn--80aafkatcapceshpicpg3h.xn--p1ai/pict/file/80761190315.pdfIn PDF document text
- http://eko-baby.ru/userfiles/file/gomuwoxubonalonenubukez.pdfIn PDF document text
- https://eseninternational.com/uploads/files/rogujumaxagu.pdfIn PDF document text
- http://verduciautodemolizioni.it/userfiles/file/8188963940.pdfIn PDF document text
- https://pollackmihalyiskola.hu/ckfinder/userfiles/files/38652215083.pdfIn PDF document text
- http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/1613bf33a2e431---54007698961.pdfIn PDF document text
- http://iraneto.com/basefile/iranetocom/files/4681023767.pdfIn PDF document text
- http://willowslakerhea.org/userimages/tolafutawusapizox.pdfIn PDF document text
- http://graficaeformazione.it/userfiles/file/53371496937.pdfIn PDF document text
- https://bozoklar.org/ckfinder/userfiles/files/fodabedog.pdfIn PDF document text
- http://sriagasthiyarastro.com/FCKeditor/userfiles/file/vasexavepobomoso.pdfIn PDF document text
- http://indexone.ru/upload/file/lowiputuwozudoxokevikom.pdfIn PDF document text
- https://alakharia.com/public_html/userfiles/file/woxemikasorukewuxofunin.pdfIn PDF document text
- https://prestinieurope.ch/userfiles/files/tedebunenug.pdfIn PDF document text
- http://basumati.com/app/webroot/ckfinder/userfiles/files/dovitarolerejowofofu.pdfIn PDF document text
- http://eichler-kammerer.de/lozafasawogaz.pdfIn PDF document text
- https://mimpiindah88.com/contents/files/suvajagowopeguwisepo.pdfIn PDF document text
- http://scsytech.com/upload/files/naxonovubajuvorolesevonev.pdfIn PDF document text
- https://ibextrail.com/editor-images/dovuxetukusobapokeper.pdfIn PDF document text
- http://draftingfloorplan.com/ckfinder/userfiles/files/8445314520.pdfIn PDF document text
- https://karlholmbygg.se/UserFiles/files/zebafomavutojiranovevek.pdfIn PDF document text
- http://gleb777.com/fck_upload/file/xejafisobumo.pdfIn PDF document text
- http://mylivediamondinventory.com/uploads/files/37610978828.pdfIn PDF document text
- http://logicparcel.net/uploadsEditorfile/730129612.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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000cf68.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCF68	10600 bytes
SHA-256: `3c1fea8551c5a1c57598c1d3ee044990352a3fafa6581faf428465659e3a3ee5`
`font_01_sfnt_off0000e7e8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE7E8	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off0000fff9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFFF9	16520 bytes
SHA-256: `e0c3b3f5fa2bd971bd59716b6cb5a43300c59a7cbd329f288ce03fe71da39538`
`font_03_sfnt_off000116f6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x116F6	22676 bytes
SHA-256: `529e0e5d0dc2d34602cbbdf6f14a6f341877e622b6b1a1159573562573261d4d`

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