PDF malware analysis — malicious · e5ef582522a5f72e

MALICIOUS

PDF

67.2 KB Created: 2021-05-02 10:19:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15

MD5: fb797d0dfbdfc2ff7cea93217f396c93 SHA-1: 106b260c642722cc33aed626978533f64eb1c08d SHA-256: e5ef582522a5f72e61a203df512e23474d517acf47eeff81d8520e0738c2f953

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised WordPress sites, suggesting it functions as a link farm. The presence of external URIs and link farm characteristics points towards a phishing or malware distribution attempt, likely delivered as a spearphishing attachment.

Machine Learning

Nyx PDF Classifier malicious score 0.9488

Heuristics 5

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
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://oneremote.ru/wp-content/plugins/super-forms/uploads/php/files/d2f6835b2fae6e5bbc22e7469fffba77/wikibe.pdf In PDF document text
- https://chamsocmuihong.com/wp-content/plugins/super-forms/uploads/php/files/gd9si67tqc487rhocuv6dd4n7n/nemalar.pdfIn PDF document text
- https://dedywiredja.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073cb3a0ecda---xejemubaberikave.pdfIn PDF document text
- http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/16074a4687812c---59792936554.pdfIn PDF document text
- https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082e6cd3c7b9---gawexipemofosejarejofo.pdfIn PDF document text
- https://www.sanier.pl/wp-content/plugins/super-forms/uploads/php/files/5psp40ggemo18rm92u856220at/28058837349.pdfIn PDF document text
- http://zawayakw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607677daa189a---66198837258.pdfIn PDF document text
- https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a9964efd77---78419175485.pdfIn PDF document text
- http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082df5979050---renovu.pdfIn PDF document text
- https://churchosonline.com/wp-content/plugins/super-forms/uploads/php/files/9ebd8467bbbea8fc76266c899eb31096/zojolaxasutope.pdfIn PDF document text
- https://swimproject.eu/wp-content/plugins/super-forms/uploads/php/files/59e5b3e928bd16616c12ab0e9971df2b/37201192986.pdfIn PDF document text
- https://law.com.sg/wp-content/plugins/super-forms/uploads/php/files/3ce0ab5b6075b6c6fef313ef9e83567b/1504597683.pdfIn PDF document text
- https://www.c2commercial.com/wp-content/plugins/super-forms/uploads/php/files/4d8b32866ac4bfb8873225cc9351dcc0/45738524991.pdfIn PDF document text
- http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16075656160516---vukoruzujafonevoxeririgu.pdfIn PDF document text
- http://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608a97b70cdb7---kepegaxisogurepete.pdfIn PDF document text
- https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/6fef8030f2b0aed3e20a2f75df2e4bef/xomusipevugivosadexufev.pdfIn PDF document text
- https://goldengrowers.com/wp-content/plugins/super-forms/uploads/php/files/6b35a5e6c812ae405458e3a4d47b0b03/76024853159.pdfIn PDF document text
- http://boulderdivorcelaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075ef72041ea---lexanupaxik.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=gotham+ultra+bold+font+freePDF link annotation
- http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000d7b3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD7B3	3328 bytes
SHA-256: `864e4c1b58142addfc1827363e4b66cc7e4de169d73f356e9f54aeba73b22f90`
`font_01_sfnt_off0000e398.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE398	5140 bytes
SHA-256: `6cf1b70bd741d81c2a13fe154b4a8fe0371ab51358f5a5619f359eedb0a915dc`

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