Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5d2d14086b53ec4…

MALICIOUS

PDF

78.1 KB Created: 2021-09-16 20:11:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: fe6039c75311946813308efceaac8825 SHA-1: 84ce189c04145002b67eeb07ea9cb929fa96298e SHA-256: e5d2d14086b53ec46d3fd657477f757d494fc85fe6be9c7e56285f09de388db8
156 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as a phishing trojan and ML classifier. It contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable hosting, suggesting a link farm designed to distribute malicious content. One URL specifically mentions 'download new version of pubg lite', indicating a lure for users seeking game updates.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://sushixusa.com/userfiles/files/1214784734.pdf In PDF document text
    • http://themadthinker.com/temp/vinney/HTML/userfiles/file/16679227757.pdfIn PDF document text
    • https://ap-qatar.com/userfiles/files/suxepelavosososab.pdfIn PDF document text
    • http://gccde.com/downloads/blog/geust/files/73180725893.pdfIn PDF document text
    • https://tommytest.dish1314.com/data/html_editor/files/35757609378.pdfIn PDF document text
    • https://pragatitic.org/ckfinder/userfiles/files/rexalunivodafikes.pdfIn PDF document text
    • http://www.ecrivains-consult.fr/easyonline/ckfinder/userfiles/files/jogito.pdfIn PDF document text
    • http://isotech.si/uporabnik/file/mepunokig.pdfIn PDF document text
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/161410f47bfc50---rofemabisu.pdfIn PDF document text
    • https://frontivo.ro/userfiles/file/tapabizivejegapumaka.pdfIn PDF document text
    • http://playoz.com/ckfinder/userfiles/files/42989823961.pdfIn PDF document text
    • https://centaur.vri.cz/docs/files/gofetisuremopidaba.pdfIn PDF document text
    • https://studio45.live/wp-content/plugins/super-forms/uploads/php/files/o8oh5c39r79nl5dmha5pavufsg/31075783724.pdfIn PDF document text
    • http://etnorom.hu/pictures/56995111532.pdfIn PDF document text
    • http://zit-tech.com/userfiles/files/bezogixu.pdfIn PDF document text
    • http://tythb.cn/uploadfile/files/kukitex.pdfIn PDF document text
    • http://thecargonepal.com/userfiles/file/59315663563.pdfIn PDF document text
    • https://polaria.cz/images/file/15183624.pdfIn PDF document text
    • https://ka-base.no/images_students/files/begatufagi.pdfIn PDF document text
    • http://wienbildarchiv.com/upload_files/files/99107297012.pdfIn PDF document text
    • http://izumrud38.com/ckfinder/userfiles/files/86940079660.pdfIn PDF document text
    • https://elitteaccesorios.com/wp-content/plugins/super-forms/uploads/php/files/4lpj4lbclvmohdvk7eupif2jul/26304098543.pdfIn PDF document text
    • https://www.cifphosteleriayturismo.es/ckfinder/userfiles/files/zagebubawem.pdfIn PDF document text
    • https://riosemarescentrodemergulho.com/ckfinder/files/53470671866.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=download+new+version+of+pubg+litePDF 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_off0000c608.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC608 11068 bytes
SHA-256: e136ad3901fc9867bacb9307005870613d319c8caac87d36cf66afd628c91099
font_01_sfnt_off0000df88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF88 19460 bytes
SHA-256: bfead3c223df3f9bb7f60ed49dafe973b84865928978ba7a0511ca9fa675395f
font_02_sfnt_off000112bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112BF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1