Malicious PDF — malware analysis report

Static analysis result for SHA-256 14b2bc5151cdc6ef…

MALICIOUS

PDF

88.6 KB Created: 2021-08-19 10:34:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 8852a3737ff5bc17f2f029179bd01c2b SHA-1: 0b413fd6baff09151eabc2aed5eacc974cd22255 SHA-256: 14b2bc5151cdc6efaae938197c5ae973b361c6436fb06b959b83f3b2ebcf6df3
156 Risk Score

Malware Insights

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

The sample is identified as malicious by ML classifiers and ClamAV, indicating it is likely a phishing or malware distribution lure. It contains numerous links pointing to compromised websites and disposable hosting, suggesting an attempt to redirect users to malicious content. The PDF structure and embedded links are consistent with techniques used to host phishing pages or distribute further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9877

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 https://myveolife.com/wp-content/plugins/super-forms/uploads/php/files/458afad436d11a9b5ef949eba88d6dc8/26752898388.pdf In PDF document text
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b8a4cfa6c40---42564477992.pdfIn PDF document text
    • https://lllk.ru/wp-content/plugins/super-forms/uploads/php/files/50f7d50e7414490a5a64a6ac0a2c6440/kezuwezabamiwulekosaj.pdfIn PDF document text
    • https://duext.com/wp-content/plugins/super-forms/uploads/php/files/856cd4ebadf6766731fd4912a929769e/99390696662.pdfIn PDF document text
    • https://aquafilling.com/userfiles/file/61306767442.pdfIn PDF document text
    • https://xn----8sbaavnccwq4am.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/15d06a64c383298c063afa4971427499/99962858549.pdfIn PDF document text
    • http://reanda.com/jingkelun/userfiles/files/20210601025827.pdfIn PDF document text
    • http://airconbank.com/upload/fckeditor/file/73428437814.pdfIn PDF document text
    • https://duext.com/wp-content/plugins/super-forms/uploads/php/files/312bcc4081151866ade9492f5711eb6e/sejixujesuk.pdfIn PDF document text
    • https://binarbaidequipment.com/public_html/userfiles/file/reribodamipizikafutikiji.pdfIn PDF document text
    • https://franchiseharbor.com/files/files/16468644910.pdfIn PDF document text
    • https://akproauto.com/nbloom/fckuploads/file/barowunodanerivixejewuwo.pdfIn PDF document text
    • https://mbzl-pro.xyz/web/img/podborky/files/latepexinog.pdfIn PDF document text
    • https://pypconsultores.mx/userfiles/file/46132172614.pdfIn PDF document text
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b61569bee46---pakufemamezuwudelikutifu.pdfIn PDF document text
    • https://skazkavdom.com/wp-content/plugins/super-forms/uploads/php/files/7adecd460a24891745aa9c6fd3374f8b/dedopotememofoxel.pdfIn PDF document text
    • http://halongbaycruises.org/upload/files/zuxamiduletugubolofagozuv.pdfIn PDF document text
    • http://www.greddy.com/admin/common/ckfinder/userfiles/File/wukulilapidarelususin.pdfIn PDF document text
    • http://aardbeienfeesten.nl/uploadimages/files/2146186671.pdfIn PDF document text
    • http://vuadiemtayninh.com/hinhanh_fckeditor/file/mojisizegojakew.pdfIn PDF document text
    • https://www.tahitotfalu.hu/ckfinder/userfiles/files/zijosebabuweji.pdfIn PDF document text
    • https://astoriareiki.com/wp-content/plugins/super-forms/uploads/php/files/d74530f2ab10d4695dccaab24f779b33/87378708318.pdfIn PDF document text
    • http://beastyenergy.com/userfiles/file/30609189440.pdfIn PDF document text
    • http://dgjinhak.kr/DATA/upload/files/202107140301077736.pdfIn PDF document text
    • http://teechart.com/uploads/images/files/zilewiv.pdfIn PDF document text
    • http://chono.mn/uploads/userfiles/files/63374042612.pdfIn PDF document text
    • http://www.heksan.com.pl/file/27518352544.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=pronombres+personales+en+ingl%C3%A9s+actividades+pdfPDF 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_off0000ea17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA17 11324 bytes
SHA-256: f4527ba77d4fd94ce227cc72fa8d4830f709d4eecf96aa76db714dfa0ecae14c
font_01_sfnt_off00010400.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10400 21304 bytes
SHA-256: 5743988f5eac02e186e561f2cecdff90153e6226e720b561515878a0a5e2db0b
font_02_sfnt_off000138c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x138C4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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