Malicious PDF — malware analysis report

Static analysis result for SHA-256 3132bd2f465d367d…

MALICIOUS

PDF

77.7 KB Created: 2021-09-18 09:24:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: e3ed9f021c100baa0bd149d86e7a4d3a SHA-1: 75bef37cd092ec425df0c2f20fd5698d7321d335 SHA-256: 3132bd2f465d367d065cbb6fda2481d5bd2276d432d1274252ec41e2dcba859e
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

The PDF was flagged by ClamAV as Pdf.Phishing.Trojan and ML classifiers indicated a high probability of maliciousness. It contains numerous embedded URLs pointing to various domains, many of which are associated with compromised CMS uploads or appear to be disposable hosting. The heuristic 'SE_QR_LURE' suggests the document might instruct users to scan a QR code, a common tactic in phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 7

  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://www.kzhep.in.ua/wp-content/plugins/super-forms/uploads/php/files/idgrkabpit95mijc0k6q8f5lm7/61033134835.pdf In PDF document text
    • https://kolbandibileklik.com/resimler/files/wajax.pdfIn PDF document text
    • http://caramelitos.sk/files/33820124598.pdfIn PDF document text
    • http://aquamedia.cn/ckfinder/userfiles/files/1751606622.pdfIn PDF document text
    • http://zeci.nl/im/image/dezukaxegizogotejuvoxibuj.pdfIn PDF document text
    • https://motecx.com/images/file/48783408948.pdfIn PDF document text
    • http://ahdjcm.com/upload/files/jidixudijofanupusogolope.pdfIn PDF document text
    • http://szyoujin.com/UploadFile/file/20210912041948224.pdfIn PDF document text
    • http://thailaundry.com/imgUpload/files/kedewutowosujojisebixip.pdfIn PDF document text
    • https://propbrains.com/wp-content/plugins/super-forms/uploads/php/files/54af4eccfbe146037598218517289197/91990103122.pdfIn PDF document text
    • https://livbiopharma.com/userfiles/file/dagarijenuwesiki.pdfIn PDF document text
    • http://zzzwchem.com/upload/files/begalakibotizosovikavawef.pdfIn PDF document text
    • https://sandp-engineering.com/ckfinder/userfiles/files/talibixazutuwazavok.pdfIn PDF document text
    • http://southportrubbish.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612eebafae61f---51220724495.pdfIn PDF document text
    • https://egokituz.org/files/galeria/files/10222086830.pdfIn PDF document text
    • https://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/bb919c7fa300136238ba7a9a0c67b690/83067608293.pdfIn PDF document text
    • https://rajaunited.com/contents/files/zabedixunipopatefadisi.pdfIn PDF document text
    • https://ofly.om-digitalsolutions.cn/upload/files/rizawubolexazazexabut.pdfIn PDF document text
    • https://huaku3c.tw/uploads/files/202109140342306040.pdfIn PDF document text
    • https://nsck-cykelmotion.dk/userfiles/file/jebilumafarupobawaru.pdfIn PDF document text
    • https://k9-warrior.com/wp-content/plugins/super-forms/uploads/php/files/gcspjimsimr2v6sfc1mefgibmv/61949246488.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/garorodiwutuliku.pdfIn PDF document text
    • http://centronegozi.com/public/finivozura.pdfIn PDF document text
    • http://www.bash.cl/media/file/jobasapodanedututav.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=put+my+phone+on+battery+saverPDF 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_off0000cb73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB73 17344 bytes
SHA-256: c70f7f416e3d2d41424b79cdde5cd802b4496847d4e97478593af621a61f87b3
font_01_sfnt_off0000f87d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF87D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011094.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11094 10800 bytes
SHA-256: f7c833543a2ebade4108ab9276449e7c1236651a142a217c331ecbb5512c3415

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