Malicious PDF — malware analysis report

Static analysis result for SHA-256 1abe953263250b6d…

MALICIOUS

PDF

83.0 KB Created: 2021-09-17 17:25:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 170462a7a5bd827881d3429f0db245a3 SHA-1: 15d5c473f887b55acf1c31c616ffbb28392d8063 SHA-256: 1abe953263250b6dca4181507557a0ff8fd0872bad90e78125315fea96099d85
164 Risk Score

Malware Insights

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

This PDF was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, many pointing to compromised CMS upload directories, and presents a visual download button. The embedded URLs suggest a phishing or malware distribution attempt, likely aiming to trick users into downloading a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://drafthe.ru/uplcv?utm_term=the+alchemist+free+pdf PDF link annotation
    • https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/161351931d291b---58049402791.pdfIn PDF document text
    • http://wohingltd.com/userfiles/lutikavejojowawov.pdfIn PDF document text
    • http://phyllisrubensteinlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/57798103276.pdfIn PDF document text
    • https://svetplus.com/userfiles/files/niwikexapi.pdfIn PDF document text
    • https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132667a6a827---43900880662.pdfIn PDF document text
    • http://mercuresamuichaweng.com/admin/file/41743622832.pdfIn PDF document text
    • http://matrixuniverzum.eu/wp-content/plugins/formcraft/file-upload/server/content/files/161410d796649f---54503795905.pdfIn PDF document text
    • https://baust.edu.bd/app/webroot/ckfinder/userfiles/files/mafobetuforakusesiti.pdfIn PDF document text
    • https://adasms.fr/userfiles/file/36680797113.pdfIn PDF document text
    • http://naszymsladem.pl/upload/file/65687876388.pdfIn PDF document text
    • https://longislandinvestmentadvisors.com/nini/userfiles/file/34645718638.pdfIn PDF document text
    • https://comfortinnbarrie.com/phpsites/vertical_living/uploads/file/fijopofesogiwoganurili.pdfIn PDF document text
    • http://zuche0551.com/upload/file/fijalebes.pdfIn PDF document text
    • http://iiiemjobs.com/FCK_Editor_Images/files/49451079293.pdfIn PDF document text
    • https://cultureresortpokhara.com/assets/userfiles/files/vodetupupo.pdfIn PDF document text
    • http://sirmamedia.com/ckfinder/userfiles/files/30335027905.pdfIn PDF document text
    • https://niboparis.com/upload/fckeditor/file/1630889204_1.pdfIn PDF document text
    • http://scamps.biz/userfiles/file/webafetawukupegawagu.pdfIn PDF document text
    • http://konberdbio.com/upload/files/28136194219.pdfIn PDF document text
    • https://ap-qatar.com/userfiles/files/suxepelavosososab.pdfIn PDF document text
    • http://fusheng-vietnam.vn/admin/webroot/upload/image/files/damadabejuve.pdfIn PDF document text
    • http://wonsakai.com/uploads/files/15399351211.pdfIn PDF document text
    • https://get-insurance.in/ckfinder/userfiles/files/zubojufudap.pdfIn PDF document text
    • http://gapp.fr/medias/files/35868702636.pdfIn PDF document text
    • https://dtd.com.pk/ckfinder/userfiles/files/gatokev.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_off0000de8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE8D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f6a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6A4 10624 bytes
SHA-256: db370ec6012dc69403edad858c1973f6900665736d2d2fab217d3ef66645f232
font_02_sfnt_off00010ee7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EE7 18512 bytes
SHA-256: a2f50081caa8f322de3b89b8d21cd19baba27052123b533ecb3e6a51bc08bdcc

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