PDF malware analysis — malicious · 59013b671ed955be

MALICIOUS

PDF

62.3 KB Created: 2021-09-13 20:02:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14

MD5: e2d614aad4292b6101aa34de00bae56d SHA-1: 81936ab71a8382b789511c4bc927abca687610d9 SHA-256: 59013b671ed955be344a6c65b7aa16d08df585029a47a05a996e29254704b6eb

162 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a significant number of external URIs, many of which are hosted on compromised or disposable domains, forming a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution by redirecting users through these links.

Machine Learning

Nyx PDF Classifier malicious score 0.5233

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.
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://wastran.ru/uplcv?utm_term=sinusoidal+trigonometric+function PDF link annotation
- http://sjhrz.com/images/upload/File/fazuxokivudomedab.pdfIn PDF document text
- http://ayhancevik.com/images_upload/files/tosida.pdfIn PDF document text
- http://debandhelder.nl/ckfinder/userfiles/files/12046935965.pdfIn PDF document text
- http://www.fattyweng.com.sg/wp-content/plugins/formcraft/file-upload/server/content/files/1612e9b70d5b1a---7392078355.pdfIn PDF document text
- https://presentkompaniet.com/img/content/file/6312980145.pdfIn PDF document text
- https://greenturtleproductions.com.au/wp-content/plugins/super-forms/uploads/php/files/89c076ce68c4280462d74821098d7fb3/wogajodozavapololi.pdfIn PDF document text
- https://www.costaverde.it/wp-content/plugins/formcraft/file-upload/server/content/files/1613e61611b600---53192500867.pdfIn PDF document text
- https://e-motorcycle.tw/upload/emotorcycle/files/45733978570.pdfIn PDF document text
- https://sukaunited4d.vip/contents/files/12396830197.pdfIn PDF document text
- http://medicapoland.pl/uploaded/file/8029920376.pdfIn PDF document text
- http://piannocreativo.com/js/new/fckeditor/userfiles/file/33204536708.pdfIn PDF document text
- http://tznjl.com/userfiles/files/kukutolosimamimajemetuto.pdfIn PDF document text
- https://membermimpi.com/contents/files/fepowe.pdfIn PDF document text
- http://allasclub.com/campannas/file/fomogajere.pdfIn PDF document text
- http://shijijiaming.net/filespath/files/20210904013153.pdfIn PDF document text
- https://ltes.tw-goods.com/UserFiles/files/57052584981.pdfIn PDF document text
- http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/1612eac55eb5b2---zikavubivuvo.pdfIn PDF document text
- https://store-connector.com/_upload_bilder/_filemanager/file/gasemofexikatotakedu.pdfIn PDF document text
- http://orem.mn/uploads/files/vadowuzejalejagefudetum.pdfIn PDF document text
- https://harpethvalleyhealth.com/wp-content/plugins/super-forms/uploads/php/files/a8234f6a2a2ba946eaaffebcbc92993b/6243926764.pdfIn PDF document text
- http://sieuthimaynhapkhau.com/upload/files/topabosepebuwanar.pdfIn PDF document text
- https://svarovanijelinek.cz/ckfinder/userfiles/files/99380770392.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_off0000c6ac.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC6AC	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000dec3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDEC3	10996 bytes
SHA-256: `82acf195d93be39f51768f4e38dc8d0ceb1a411f5a43291271470bf94352104d`

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