Malicious PDF — malware analysis report

Static analysis result for SHA-256 1bf2d7926a6e7d7a…

MALICIOUS

PDF

86.4 KB Created: 2021-08-14 07:58:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: b8d5848265575feca1e8fdd8279b0d92 SHA-1: d6792b005f51d29b5733020d8c072bb563343e54 SHA-256: 1bf2d7926a6e7d7af36a9baaae2b6c963a161247df2933fbdc1285f720b2361d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to compromised websites and disposable hosting, suggesting a phishing or malware distribution scheme. The PDF structure and embedded links are consistent with techniques used to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

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://deepakbatteries.com/uploads/file/xofuli.pdf In PDF document text
    • http://akpanlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/vodutojajuda.pdfIn PDF document text
    • http://at2apigroup3.com/contents//files/7605407972.pdfIn PDF document text
    • http://www.risingstars.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160b45a0a97417---78829581384.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/0mh03l0ne39np3ei5e3ninfdf6/18773843363.pdfIn PDF document text
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160985b6d3c2db---48054597918.pdfIn PDF document text
    • http://satakantaresort.com/user_img/files/6454498197.pdfIn PDF document text
    • http://www.advokat.com/app/webroot/img/fck/file/gewikuzizudozakalumet.pdfIn PDF document text
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1606f184c19a97---meberanesekazakujizexa.pdfIn PDF document text
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/160adf49d17bc7---pawekeb.pdfIn PDF document text
    • http://aklond.com/UploadFilesfile///2021050701010188.pdfIn PDF document text
    • http://sro52.ru/uploads/files/vebimagumixij.pdfIn PDF document text
    • http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a72d798fc7a---5425022679.pdfIn PDF document text
    • http://kodemari.info/data/files/72790531050.pdfIn PDF document text
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8654dc3795---sebokiz.pdfIn PDF document text
    • http://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608c61277ff0d---galoxosisov.pdfIn PDF document text
    • https://mangmalungtea.com/userfiles/file/44029010612.pdfIn PDF document text
    • http://614move.com/clients/4890/File/26269417880.pdfIn PDF document text
    • https://inchirieriavioane.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608aaf94dc2a5---daxelitezi.pdfIn PDF document text
    • http://chinocorporatechallenge.com/clients/6216/File/5075093540.pdfIn PDF document text
    • http://lyzebrno.cz/userfiles/file/37997085039.pdfIn PDF document text
    • http://www.britocunhaadvocacia.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/1606d4569b96d2---63573868013.pdfIn PDF document text
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c6bf2bc74a---55691404024.pdfIn PDF document text
    • https://www.properties-thassos.com/wp-content/plugins/super-forms/uploads/php/files/ei5spc22h31ejkavf3jh2kub3v/52125330862.pdfIn PDF document text
    • https://eventaipei.com/upload/files/gomexibazuvufup.pdfIn PDF document text
    • https://www.penyembuhanholistikreiki.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074bfe8e9f0c---12562056525.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=trioxido+de+azufre+nomenclatura+tradicional+stock+y+sistematicaPDF 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_off0000e7f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7F7 18104 bytes
SHA-256: b70c41f93138c212f34bcb71934360804b9e6aa3408b7a40168fd7ee3ec9f389
font_01_sfnt_off00011625.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11625 11068 bytes
SHA-256: 7482f9ed7eb72f65516375a1ea3130b9874f6a7e3583728976f07cc5e626eb19
font_02_sfnt_off00013001.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13001 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1