PDF malware analysis — malicious · fee6c9ae51f8fdbd

MALICIOUS

PDF

74.0 KB Created: 2021-09-17 16:02:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27

MD5: 29c45c4a889980f33c4004620588d79f SHA-1: 6c4443f891dda165db15f2c4e27c831eacbd1664 SHA-256: fee6c9ae51f8fdbd3d12fb1a187076e9cedadede83235d4f7ed8e43044e3e2db

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains a link farm with numerous URLs, many hosted on compromised WordPress sites or disposable domains, suggesting a phishing or scam operation. The presence of embedded URLs and the PDF_SEO_DISPOSABLE_LINK_FARM heuristic further support the conclusion that the document's primary purpose is to redirect users to malicious websites.

Machine Learning

Nyx PDF Classifier malicious score 0.9982

Heuristics 6

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

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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.
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://catamma.ru/uplcv?utm_term=st+albert+phone+book PDF link annotation
- http://www.almansori-ye.com/almansorifiles/files/36551050071.pdfIn PDF document text
- https://vsetinrally.cz/userfiles/file/maxona.pdfIn PDF document text
- https://www.hediyevideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613fcf912fe1f---31094653884.pdfIn PDF document text
- http://montesantangelo.it/files/files/zerajeminubejisozi.pdfIn PDF document text
- https://jaukiaplinka.lt/ckfinder/userfiles/files/muwolipusodezalodil.pdfIn PDF document text
- https://ncltandatbar.com/home/ncltandat/public_html/dowalumniusa/ckfinder/userfiles/files/94733680060.pdfIn PDF document text
- https://nbc.com.vn/ckfinder/userfiles/files/wavedetanebegenagovonud.pdfIn PDF document text
- http://brenna-ski.pl/userfiles/file/diwutoresevirowoxarigi.pdfIn PDF document text
- https://bohemiamaestro.com/webpagebuilder/ckfinder/userfiles/files/2725504523.pdfIn PDF document text
- https://kokomanis.com/contents/files/74465546639.pdfIn PDF document text
- http://kme-kme.cz/files/file/xudesesemi.pdfIn PDF document text
- https://24emk.ru/ckfinder/userfiles/files/xewenolalawibo.pdfIn PDF document text
- http://xn--z92bzy85x.com/userData/board/file/faburusedaxikupalune.pdfIn PDF document text
- http://tindangnhadat.vn/upload/files/49883968047.pdfIn PDF document text
- https://anyimaker.com/upload/users/files/lawinodemuzujopej.pdfIn PDF document text
- http://ozhelalikram.de/resimler/files/74284252158.pdfIn PDF document text
- https://bd-sokolovska.eu/userfiles/file/rijowafin.pdfIn PDF document text
- https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140e349be1ff---jabaxesimewekorosifudozat.pdfIn PDF document text
- https://sarvodayasamaj.uk/upload/files/29722527877.pdfIn PDF document text
- http://emanuelmlevin.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/jorobeboxinodebigusebi.pdfIn PDF document text
- http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161398d15a2925---fezufose.pdfIn PDF document text
- https://xn--80adj7cxa.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/46f02a930b431bcc748fd5ffa700fc75/98491810720.pdfIn PDF document text
- https://www.fangjin.org/ckfinder/userfiles/files/6952474684.pdfIn PDF document text
- https://gaseg.com/wp-content/plugins/super-forms/uploads/php/files/35eknqqoddbufiudp53oeo137r/2209707655.pdfIn PDF document text
- http://vijyaiprismcrm.com/userfiles/files/11707862661.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_off0000bdfa.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xBDFA	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000d611.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD611	10396 bytes
SHA-256: `cb30c12499b510d2666ed54bfb0950348f50a97b1eb16ef118db7d1f7e6ef1ca`
`font_02_sfnt_off0000ed50.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xED50	17128 bytes
SHA-256: `8d72bece2e38cfa74ecf5b300b8f7d98ca68245de481a446d437090396d01abf`

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