Malicious PDF — malware analysis report

Static analysis result for SHA-256 aeeb01cf0d6b1c4f…

MALICIOUS

PDF

84.8 KB Created: 2021-09-05 06:48:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: bcc72906721f01ad073aa96a352f15a6 SHA-1: fe808e3fb8e7fda36ffd046a710e37c20987325a SHA-256: aeeb01cf0d6b1c4f48467aae42f6e007b1deb27da69c34eee860fac2b2945302
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link farm, directing users to multiple external URLs hosted on compromised CMS uploads and disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' confirms the nature of the links as potentially deceptive.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 6

  • 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.
  • 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://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a9d20d7d17---felurudelus.pdf In PDF document text
    • http://cbafjvn.com/uploads/userfiles/file/1547214396.pdfIn PDF document text
    • http://myconnect-thailand.com/image/upload/File/mibaborol.pdfIn PDF document text
    • https://abugfreemind.com/userfiles/file/mofosazuf.pdfIn PDF document text
    • https://readxyz.com/wp-content/plugins/super-forms/uploads/php/files/fb7cc8a9fa3184cb045db573d41b837b/62999930667.pdfIn PDF document text
    • https://krassimirtaskov.com/userfiles/files/81603031311.pdfIn PDF document text
    • http://tyros-club.de/userfiles/file/60683172125.pdfIn PDF document text
    • http://abwninemile.com/uploads/files/77168319430.pdfIn PDF document text
    • https://golf-tout-terrain.com/publish/page/file/97053736256.pdfIn PDF document text
    • http://cbgnfinance.com/userfiles/file/vadalimozuzazuditure.pdfIn PDF document text
    • http://annamsaigonlaw.com/upload/files/pexilebinojonuzo.pdfIn PDF document text
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099b0e4caecb---97924377608.pdfIn PDF document text
    • https://cesiedizioni.com/userfiles/file/40234503724.pdfIn PDF document text
    • http://esenkardeslerinsaat.com/resimlerfiles/17213463008.pdfIn PDF document text
    • http://willettelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/28093307779.pdfIn PDF document text
    • http://ghibms.com/userfiles/files/34801344735.pdfIn PDF document text
    • http://gsprojekt.eu/userfiles/files/ziwudelukonerexamelab.pdfIn PDF document text
    • http://goddesshair.net/upload/users/files/zawawobamadenunibog.pdfIn PDF document text
    • https://showdetango.com/bafa/userfiles/file/72250253886.pdfIn PDF document text
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d11bba536d---musazumutadevejewamose.pdfIn PDF document text
    • http://hkxhjfc.ltd/uploads/files/20210731071956.pdfIn PDF document text
    • http://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607acea06d7ad---39723327766.pdfIn PDF document text
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16087144d472bf---30218870820.pdfIn PDF document text
    • https://torrentclub.vip/wp-content/plugins/super-forms/uploads/php/files/t3hkldk895dfcrgg21imjp16gi/13368409791.pdfIn PDF document text
    • http://tokstar.com/_UploadFile/Images/file/25386332114.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=histoire+des+rayons+x+pdfPDF 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_off0000e133.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE133 10652 bytes
SHA-256: 70cf8f576a7f569ca5db42e6f084335a34f2df23edd032a952fefbdd007ce164
font_01_sfnt_off0000f9b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9B9 20480 bytes
SHA-256: 0901bb45560d2cc5bc801fcaf2ffa70bf7dbc56e2239020a13c5e2e45d046031
font_02_sfnt_off00012bb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BB7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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