Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ebaa2e7d4a63a56…

MALICIOUS

PDF

76.4 KB Created: 2021-09-01 01:08:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 00c8a4783ecae0188e7c946c133d2f23 SHA-1: 36c41535ccd8df7339b7c80385e793f739906a26 SHA-256: 2ebaa2e7d4a63a56b5e7c1f0754d5283eeac383a4f59150cc3eee1d46e7f9d14
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1055.012 Process Injection T1204.002 Malicious Link

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links, many pointing to compromised WordPress sites, suggesting it functions as a link farm. The presence of these links indicates an attempt to lure users to external malicious resources, likely for phishing or malware distribution. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://caribsplash.org/wp-content/plugins/formcraft/file-upload/server/content/files/160f06ee1ce5cb---84810498841.pdf In PDF document text
    • https://balance-global.com/wp-content/plugins/super-forms/uploads/php/files/u9ehmjp3gm418ft3sjp58r5chk/17219376811.pdfIn PDF document text
    • http://arcos-eff.it/userfiles/files/bojuzewubi.pdfIn PDF document text
    • http://www.nisbd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a09ee722f13---59113410179.pdfIn PDF document text
    • https://braindevelopmentmaps.org/userfiles/files/33908820916.pdfIn PDF document text
    • http://pericosrentcar.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1608ade69d199d---66084119874.pdfIn PDF document text
    • http://polloricowings.com/uploads/files/mifusutepilelonir.pdfIn PDF document text
    • http://deccanquest.com/konadnew/userfiles/file/2005113270.pdfIn PDF document text
    • https://www.uniqueartzz.com/wp-content/plugins/super-forms/uploads/php/files/odp6s4rktocn48s24ssuh8cpsg/tiniwatine.pdfIn PDF document text
    • https://suprizpin.com/calisma2/files/uploads/puxurojujazapedubujazede.pdfIn PDF document text
    • http://futurepoolandspa.com/ckfinder/userfiles/files/2383009295.pdfIn PDF document text
    • http://albino-pitti.com/pub_img/file/24738538463.pdfIn PDF document text
    • http://ibshop.gr/uploads/_uploads/files/putaxizenuxomelop.pdfIn PDF document text
    • https://areicon.com/images/file/14672412468.pdfIn PDF document text
    • http://www.combatsim.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160c53407e7d4f---3752445323.pdfIn PDF document text
    • http://ventilatoryzlin.cz/images/file/setenedufasasuketizusen.pdfIn PDF document text
    • https://maydongy.com/wp-content/plugins/super-forms/uploads/php/files/rjunsc65r35ikgudpfosodhg28/xawogadalopofowirupixu.pdfIn PDF document text
    • https://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160f7db0c6dd54---36203757857.pdfIn PDF document text
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/160a299db2dda3---vulafalu.pdfIn PDF document text
    • https://www.die-umzugsfabrik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f40ab7b5c3---rirof.pdfIn PDF document text
    • http://hoangnamjsc.com/upload/files/47277697703.pdfIn PDF document text
    • https://rockyshairsalon.com/wp-content/plugins/super-forms/uploads/php/files/4vr3vbti16vb4din9194uve07o/fupenutokivogixewopu.pdfIn PDF document text
    • http://fields-on-earth.com/images/blog/file/zodamixum.pdfIn PDF document text
    • http://land89.com/ckupload/files/52213510962.pdfIn PDF document text
    • https://grupahatak.pl/admin/_fck_files/file/76473356517.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=temperance+river+state+parkPDF 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_off0000c825.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC825 10488 bytes
SHA-256: 5a2c6d2c6da01e7706ffc9573c1bb3703a231fec66384829b19339e7b46b190f
font_01_sfnt_off0000e005.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE005 16912 bytes
SHA-256: cbbfdc3eb45d0a2a16e93113b22442c69b28b7c019a06fd6df772e08b93e9b5a
font_02_sfnt_off00010bb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BB6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1