Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa0fe21e4c8312f7…

MALICIOUS

PDF

67.6 KB Created: 2021-09-23 05:18:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 39749212a04515ca85c563bee7eb6a1a SHA-1: c9aef8b0ca49d058a428b2020df513fc3bfdc5a9 SHA-256: fa0fe21e4c8312f7479ecdc76a481ad68dcdc4e9e6ddab174642ca9e2856691d
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains embedded JavaScript and numerous external URIs pointing to compromised websites, suggesting it's used as a lure to redirect users to potentially harmful content. The presence of link farms on disposable hosting further supports its role in a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/1613d981ce368f---42475963783.pdf In PDF document text
    • https://delphin-restaurant.com/ckfinder/upload/files/zeser.pdfIn PDF document text
    • https://cafeau1ait.xyz/js/ckfinder/userfiles/files/durumekutebutopadu.pdfIn PDF document text
    • http://avtrak.ru/ckfinder/userfiles/files/besajatigaf.pdfIn PDF document text
    • https://vibangthuaphatlai.net/uploads/files/latamikopobana.pdfIn PDF document text
    • https://llibreriaha.com/img/events/file/17173544966.pdfIn PDF document text
    • https://digicpictures.com/downloads/visolikafemiwuxaduro.pdfIn PDF document text
    • https://x-software.cz/data/file/42059817407.pdfIn PDF document text
    • https://mebelpozakazu.ru/wp-content/plugins/super-forms/uploads/php/files/fda3e871ac3ec3493b8b4a491d88ed0b/11850920385.pdfIn PDF document text
    • https://wedding-photos.cz/userfiles/file/jovob.pdfIn PDF document text
    • http://hasdeu.md/data/userfiles/files/70180581712.pdfIn PDF document text
    • http://psn-monolit.ru/img_file/files/lekibi.pdfIn PDF document text
    • http://rusiuojigalvoji.lt/wp-content/plugins/formcraft/file-upload/server/content/files/1613041242cc4f---wuriresiviwevawajekip.pdfIn PDF document text
    • http://atthaya.com/file_media/file_image/file/8742939645.pdfIn PDF document text
    • http://box8websites.com/ckfinder/userfiles/files/81555312964.pdfIn PDF document text
    • https://eltechma.com/zdjecia/fck/file/begomevegazef.pdfIn PDF document text
    • http://local-minicab.com/survey/userfiles/files/75546236197.pdfIn PDF document text
    • http://doorsatyrau.com/ckfinder/userfiles/files/86904162563.pdfIn PDF document text
    • http://bagandpack.ru/wp-content/plugins/super-forms/uploads/php/files/b3ad1b197fcfab42d0cdb20e370fc6fd/3676314092.pdfIn PDF document text
    • http://www.nanodrywash.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134f4812275b---jufovisorarepinixaw.pdfIn PDF document text
    • https://www.pharmawell.eu/ckfinder/userfiles/files/kojudivazogekobow.pdfIn PDF document text
    • http://theurbanbazzaar.com/userfiles/file/zesamatatilufusovira.pdfIn PDF document text
    • http://immobilieninvestors.org/userfiles/file/13743643782.pdfIn PDF document text
    • http://animationcoach.com/userfiles/file/43058394610.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=full+movie+devil+on+topPDF link annotation
    • 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_off0000aeee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAEEE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c700.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC700 14180 bytes
SHA-256: dd0adc7d28acc960af3f7d9739c51b04d40e11e90b744126ec2cee350b9c4798
font_02_sfnt_off0000ea57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA57 10268 bytes
SHA-256: dba78d1e6a95b6c2d2198378d7a4d795a565ffb5a6d81c5354a5d89575fed2b2

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