PDF malware analysis — malicious · 34224a2dd14ff448

MALICIOUS

PDF

72.0 KB Created: 2021-09-04 03:47:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27

MD5: fb95d84e73e3da3aa090a9a8ee767339 SHA-1: 6e613fac3737506e84e8c48985b837c7a994385f SHA-256: 34224a2dd14ff448c2cdca05eddc62d1ccac7cd55b558a009fc81e5f2226b599

172 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains embedded JavaScript and multiple links to external URLs, some hosted on compromised WordPress sites. The ClamAV detection 'Pdf.Phishing.Trojan' strongly suggests a phishing or trojan delivery intent. The embedded JavaScript likely facilitates the execution of malicious code or redirection to a phishing site.

Machine Learning

Nyx PDF Classifier suspicious score 0.4393

Heuristics 7

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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK

PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
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.
Embedded JS stream low PDF_JS

PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
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://smidgel.ru/uplcv?utm_term=teach+yourself+electricity+and+electronics+6th+edition+pdf+free+download PDF link annotation
- http://boulderdivorcelaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086b27d6c296---giwemisetapaveruz.pdfIn PDF document text
- https://www.hdontheroadnapoli.it/wp-content/plugins/formcraft/file-upload/server/content/files/160bee9b433a8b---23231727702.pdfIn PDF document text
- https://theshairpodcast.com/wp-content/plugins/super-forms/uploads/php/files/9046aa72be3dd473e34a4a5f2011c5a1/31666332456.pdfIn PDF document text
- http://jianianhuayule.a9188.com/upload_files/art_files/files/20210820_230039.pdfIn PDF document text
- http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/160917a88d4019---zerodil.pdfIn PDF document text
- https://fcksa.com/ckfinder/userfiles/files/fopazizas.pdfIn PDF document text
- http://safeabortionnepal.com/userfiles/file/79407356779.pdfIn PDF document text
- https://alarrabnews.com/images/content/content/file/xuwonetukitokilijisajuzo.pdfIn PDF document text
- http://konberdbio.com/upload/files/73600835824.pdfIn PDF document text
- https://dm288.rs/slicice/file/33750459748.pdfIn PDF document text
- http://111-orte.de/testarea/cwsCMSlight/media/files/gezuxokelotakut.pdfIn PDF document text
- http://1959blackshirts.com/clients/866684/File/79991409690.pdfIn PDF document text
- http://files.ibiza-ferien.de/file/98573858162.pdfIn PDF document text
- https://ambulatorioveterinariosismondi.eu/file/jinonuwukagavelir.pdfIn PDF document text
- http://thepokeluau.com/uploads/files/82161566362.pdfIn PDF document text
- http://grimastone.ru/files/69962628043.pdfIn PDF document text
- http://dienmaythanglong.org/uploads/files/14185330029.pdfIn PDF document text
- http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608692f4c6f7e---80924041445.pdfIn PDF document text
- http://osrclass1967.com/clients/8/84/84e84eb3bb32f45446e669e24fea3ebc/File/puvanik.pdfIn PDF document text
- http://apexnepaltravel.com/userfiles/file/bonuzekereji.pdfIn PDF document text
- http://faithleader.org/js/ckfinder/userfiles/files/lenut.pdfIn PDF document text
- http://misosmile.com/upload/editor/files/virevafiwaxetewolirijoka.pdfIn PDF document text
- http://synthecinter.com/userfiles/files/50309009877.pdfIn PDF document text
- http://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000e110.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE110	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000f927.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF927	11148 bytes
SHA-256: `bb2c415d6d1f067f19062eb27f407daad17d0187835ee8867fd4e4aacf7ea73d`

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