PDF malware analysis — malicious · dd3f7ade294ed43f

MALICIOUS

PDF

74.9 KB Created: 2021-09-15 20:03:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24

MD5: f8f9cb6e60db3c2a5f197e7d0d837adb SHA-1: 79f16dbadf23fb43bbf005c9579a05bcd83efe94 SHA-256: dd3f7ade294ed43f437ae9a08b4c6cc478c33e8d0e79bb140cfaaf597ee7c1a1

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. Heuristics indicate the PDF acts as a link farm, directing users to multiple external websites, some of which are hosted on compromised CMS uploads or disposable domains. The presence of numerous unknown URLs suggests a distribution or phishing campaign.

Machine Learning

Nyx PDF Classifier malicious score 0.6960

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
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
PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED

The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
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 http://doradcyprawni.com/images/pliki/17462225762.pdf In PDF document text
- http://www.kotolantopeni.cz/files/nidutipeto.pdfIn PDF document text
- http://kashima.cc/userfiles/file/63568545067.pdfIn PDF document text
- https://aljazeerahdrilling.com/userfiles/files/6005755730.pdfIn PDF document text
- http://jinanxintiandi.com/userfiles/files/sexupanedujamopujizulaj.pdfIn PDF document text
- https://fmpride.com/wp-content/plugins/super-forms/uploads/php/files/f8463203c02396c2a7350a4727df89fa/6813106225.pdfIn PDF document text
- https://rubyyadav.com/nbloom/fckuploads/file/48472473569.pdfIn PDF document text
- https://machnik.net/ckfinder/userfiles/files/59408808974.pdfIn PDF document text
- https://iieng.org/editor/ckfinder/userfiles/files/pupinitupamigonezivura.pdfIn PDF document text
- https://producedepot.us/userfiles/files/63060956975.pdfIn PDF document text
- http://www.emporiocaritaspisa.it/wordpress/wp-content/plugins/formcraft/file-upload/server/content/files/161369e3b5392b---lopetifoxozigonutug.pdfIn PDF document text
- http://www.leesii.com/wp-content/plugins/formcraft/file-upload/server/content/files/161390273758ce---24008633065.pdfIn PDF document text
- http://bowie.abwingsmd.com/uploads/files/3571112919.pdfIn PDF document text
- https://girilawfirm.com/content_files/files/tafowunibalit.pdfIn PDF document text
- https://www.andimoda.com/wp-content/plugins/super-forms/uploads/php/files/a6445f90eb52ce44fe152256a070db3f/34138840289.pdfIn PDF document text
- http://atlonnuri.org/UpLoadImage/editer/files/84007605126.pdfIn PDF document text
- https://transcendenceit.com/wp-content/plugins/super-forms/uploads/php/files/cddba1aa8a5a17272fed5648e0318bdb/71658619494.pdfIn PDF document text
- https://asiatravel.kg/wp-content/plugins/super-forms/uploads/php/files/36ea7442f6b082149411ac96a5713202/53260047378.pdfIn PDF document text
- https://immo-macedo.lu/userfiles/files/60036712730.pdfIn PDF document text
- https://postelezmasivu-zlin.cz/ckfinder/userfiles/files/36244861619.pdfIn PDF document text
- http://byecook.com/ckupload/files/wufitopupemawibimiru.pdfIn PDF document text
- http://kaushalacademy.org/ckfinder/userfiles/files/jesevunusovaxifif.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=how+to+get+data+back+after+factory+resetPDF link annotation
- 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_off0000cfeb.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCFEB	16772 bytes
SHA-256: `3b0d80d369ba4c99f03ff14adc9aae806656378f1d4ec2d21944a9fcd79ebbbd`
`font_01_sfnt_off0000fb52.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFB52	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00011369.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11369	10832 bytes
SHA-256: `ef5acebe20d142fcb964678e97a860c96a325987d0b868b8bd355e92c6da7fd5`

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