PDF malware analysis — malicious · b09150da74baf060

MALICIOUS

PDF

88.7 KB Created: 2021-08-12 09:16:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11

MD5: 77408d704fbb0a626058195c53d51cf1 SHA-1: 0df05bb824b0f2351fda2b124fa17cf70a306b71 SHA-256: b09150da74baf060732e829b377f971fc720c61333267f59c0a65914515c01c3

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF was identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains numerous links pointing to compromised WordPress sites, acting as a link farm to distribute further malicious content. The presence of embedded URLs and the nature of the link farm suggest an attempt to redirect users to phishing or malware download sites.

Machine Learning

Nyx PDF Classifier malicious score 0.6048

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 http://blog.crowdly.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607be467463a9---31289915884.pdf In PDF document text
- https://dentinale.eu/wp-content/plugins/super-forms/uploads/php/files/55ebc91a175cb2ff5127c79f3f656dfb/pepuxagizid.pdfIn PDF document text
- https://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0ed0e42ef2---janujava.pdfIn PDF document text
- http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092a71c25e2c---97228016142.pdfIn PDF document text
- http://ar-intl.net/wp-content/plugins/super-forms/uploads/php/files/0rpo4u60hf2jpfhod4kkv4q684/93563640490.pdfIn PDF document text
- https://www.andyselfstorage.co.uk/wp-content/plugins/super-forms/uploads/php/files/ac8nbqe2pvgm10487ilg4271k1/pekudovinefiruzo.pdfIn PDF document text
- http://sieuthivatlieuhoanthien.com/upload/files/79885281193.pdfIn PDF document text
- https://www.ediliziaindustriale.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607696eec6456---zutabexusadiwobowododiva.pdfIn PDF document text
- https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b9791f72209---21344538269.pdfIn PDF document text
- http://carroll1975.com/clients/4/4e/4e2b018d07aaa5a30c3e4fca1c7a8df7/File/47751282933.pdfIn PDF document text
- http://pasted-radio.de/web/files/96918350382.pdfIn PDF document text
- https://www.highlandernepal.com/assets/ckfinder/userfiles/files/fokawexo.pdfIn PDF document text
- https://bettyloupaints.com/userfiles/files/majodaxuserowibumixu.pdfIn PDF document text
- http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606f3b03b763b---pogepogodew.pdfIn PDF document text
- https://sieompaysdebray.fr/lesiom/txt/imgadmin/file/budozezizoji.pdfIn PDF document text
- https://artlabjo.com/userfiles/file/xinarunodopirobadesa.pdfIn PDF document text
- http://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fdeaf49c5e---ruwibixatokazetepegitilab.pdfIn PDF document text
- http://turskazka.ru/ckfinder/userfiles/files/ragixetiworixetumojo.pdfIn PDF document text
- https://coastalholidayproperty.com/ckfinder/userfiles/files/79349994303.pdfIn PDF document text
- http://stacjaregeneracja.pl/userfiles/file/14635773830.pdfIn PDF document text
- https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/375cbb92822bea826d00278a11d4e5cd/76063000921.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=chocolate+brown+keune+hair+color+chart+with+numbers+in+pakistanPDF 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_off000103a6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x103A6	19140 bytes
SHA-256: `f6363eb89957c0ea48f637e653ffacbb5b2515914e7bf8fdb58996196f1fb8de`
`font_01_sfnt_off0001340e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1340E	11088 bytes
SHA-256: `9196e05a291f9701179dbb15ba4bfbd79bbb4ad1f970d54069f5844af5347601`
`font_02_sfnt_off00014d9d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x14D9D	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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