Malicious PDF — malware analysis report

Static analysis result for SHA-256 414700ef0550beb0…

MALICIOUS

PDF

83.1 KB Created: 2021-09-21 06:36:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 47f00dfd26ad2ad22f6462fe5311b383 SHA-1: c2f255a893e4617622bebda64775622ff3e4e844 SHA-256: 414700ef0550beb03d192ad169091dd145416bdf2dd09458c7a1ec4de522a368
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a large number of external links, many of which point to compromised WordPress sites or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. The embedded JavaScript is a common technique for executing malicious code within PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://catamma.ru/uplcv?utm_term=imp+of+the+mind+pdf PDF link annotation
    • https://technok.cz/wp-content/plugins/super-forms/uploads/php/files/9f584f0ddd47fae0bf37dee464a2f0d9/petovasakubufadinoxawo.pdfIn PDF document text
    • https://pergamine.com/ckfinder/userfiles/files/mipinesaronosuna.pdfIn PDF document text
    • https://yaslibakicisi.net/userfiles/file/gitusifukofowugeworusix.pdfIn PDF document text
    • http://s8radziejowice-paszkow.pl/userfiles/file/takafipafopojaf.pdfIn PDF document text
    • https://noble-worldwide.com/wp-content/plugins/super-forms/uploads/php/files/0a620062ee616f238b08b6815ee55b90/tilakuforazi.pdfIn PDF document text
    • http://uelzecht.lu/userfiles/files/96712465413.pdfIn PDF document text
    • http://foto-recepty.sk/images/fotky/58688255131.pdfIn PDF document text
    • http://fabriquetextil.com/js/new/fckeditor/userfiles/file/74596599837.pdfIn PDF document text
    • http://posekatzahradu.cz/files/file/84846847409.pdfIn PDF document text
    • https://g55net.com/webpagebuilder/ckfinder/userfiles/files/91874996759.pdfIn PDF document text
    • https://taxforce.nl/userfiles/files/torujasajipuwopudoza.pdfIn PDF document text
    • http://tourhong.com/FileData/ckfinder/files/20210906_FB5170864DA20C76.pdfIn PDF document text
    • http://villapellegrino.it/userfiles/files/8881019263.pdfIn PDF document text
    • http://mislenyiallatorvos.hu/userfiles/file/vetilorizekujafak.pdfIn PDF document text
    • http://ux02.wadhost.com/js/ckfinder/userfiles/files/94718698215.pdfIn PDF document text
    • http://www.tecnotrefg.it/wp-content/plugins/formcraft/file-upload/server/content/files/16132826ba03e8---47943107751.pdfIn PDF document text
    • https://dollarplus98.com/images/upload/files/45715147877.pdfIn PDF document text
    • http://whygzy.com/Media/Uploads/files/witotizemidu.pdfIn PDF document text
    • https://duragloss.pl/userfiles/file/suzezoxuwizev.pdfIn PDF document text
    • https://k-newsletter.com/ckupload/files/42655782938.pdfIn PDF document text
    • http://client.diffuse.info/files/58170917595.pdfIn PDF document text
    • http://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/161425ee8d0e96---radedilipizi.pdfIn PDF document text
    • http://perilatomsk.ru/ckfinder/userfiles/files/diwafisegadamagigasu.pdfIn PDF document text
    • https://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136c53b64594---welipaxamuxelif.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • 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.

FilenameKindSourceSize
font_00_sfnt_off0000e046.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE046 18608 bytes
SHA-256: c4e4f30c7d9fd11539c87fadb151d2ab1882c467c8f18b72c7cb2e4ee29e7ce0
font_01_sfnt_off00011064.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11064 10236 bytes
SHA-256: 94fbf2fa482dfb2bbc52a905faddd944b205aec84c9018e2fa318b2a26cfe80f
font_02_sfnt_off0001271b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1271B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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