Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e2af3f2523d9f3f…

MALICIOUS

PDF

85.9 KB Created: 2021-07-03 00:32:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 223b9983d25af7fdf50a1fd6869c642e SHA-1: 415618cc1d225dc0823a35ff019766dc2f89c899 SHA-256: 1e2af3f2523d9f3fdf18163437f5bc9c941236321e039ccbf70991908418e261
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple compromised or disposable hosting sites, which is a common tactic for phishing or malware distribution. Although no scripts were extracted, the PDF structure and embedded URLs strongly suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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.
  • 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://colorfulmedia.de/fotki/fotki/file/63728789394.pdf In PDF document text
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/6f2c7b8e47afb20211dedab27568cddb/78261542481.pdfIn PDF document text
    • https://www.hausbootgeiseltalsee.de/wp-content/plugins/super-forms/uploads/php/files/uhpl0gc32mfvvfmbarb8sr2fp1/87591493447.pdfIn PDF document text
    • http://tutek.eu/userfiles/file/94440370915.pdfIn PDF document text
    • http://anatolianlgs.com/userfiles/file/rikonunelivixizotumup.pdfIn PDF document text
    • https://ikima.fr/uploads/file/xotupomamiwi.pdfIn PDF document text
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b3b29e363f---jaxuzutugavizuzorewolote.pdfIn PDF document text
    • https://forkidsvietnam.vn/wp-content/plugins/super-forms/uploads/php/files/o13jdshlc07lckcosk0kauvoaa/mikitidasinomubukovomu.pdfIn PDF document text
    • https://adlinefor.com/home/webagen/public_html/korn/data/file/gigadetobufediwemudes.pdfIn PDF document text
    • https://condicionamentofisico.com/arquivos/file/sonazobodaruxerokelenugef.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a56a18cca2d---numifebepifef.pdfIn PDF document text
    • http://santamariamikado.com/uploads/files/62097777394.pdfIn PDF document text
    • https://victory-agency.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089564d3623d---jesekabudunumigusumalive.pdfIn PDF document text
    • https://nowbali.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/160b2075f400bc---65346076213.pdfIn PDF document text
    • https://nbcmedia.vn/ckfinder/userfiles/files/dujoriporutozowamafi.pdfIn PDF document text
    • http://fashioncenterpoint.com/wp-content/plugins/super-forms/uploads/php/files/6adb646fa4171c74815e6f8ffcc50735/bedukemoperavapire.pdfIn PDF document text
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a19b2c71782---balosax.pdfIn PDF document text
    • https://area34.info/wp-content/plugins/super-forms/uploads/php/files/96tpjpkouoq1go09eqq69n9dr0/gekomotilutonogifokuma.pdfIn PDF document text
    • https://sunarchegypt.com/userfiles/file/17927625492.pdfIn PDF document text
    • http://dnepropress.net/files/file/86668461183.pdfIn PDF document text
    • https://radmangroup-ye.com/rgfiles/file/zifinuxuj.pdfIn PDF document text
    • https://frontiersneurophotonics.org/wp-content/plugins/formcraft/file-upload/server/content/files/1/1607e752ef0e1d---didebunupazuxu.pdfIn PDF document text
    • http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160de71860beb3---54401472952.pdfIn PDF document text
    • https://dolnoslaskialarmsmogowy.pl/imgturysta/files/54716145958.pdfIn PDF document text
    • http://myphamlulanjina.com/upload/files/xegonaponasobixajaxekir.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=12th+std+question+bank+with+answersPDF 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_off0000ee7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE7F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010696.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10696 10936 bytes
SHA-256: 9fd6f44e71cbc9d1e3064ee7fcef6fca7ba938890dcb3acdf3275973ee876bab
font_02_sfnt_off00011fcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FCC 16560 bytes
SHA-256: 3cbf0e2d9f01dc57fd5cd4c18b315574ab63ed5cfe67bc97ffa14423a897603b

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