Malicious PDF — malware analysis report

Static analysis result for SHA-256 beba8e80470e2fce…

MALICIOUS

PDF

79.5 KB Created: 2021-09-21 07:21:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 968ada47395f1fe61cea88573d2f8351 SHA-1: fe74990a2c425dc8f1d1003630c23126347622f3 SHA-256: beba8e80470e2fce07c74e33a9497ae0f09dfe5ab2b9490a3de6b8d638ce69d0
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the document is designed to host numerous links on disposable domains, a common tactic for phishing or distributing further malware. While no scripts were explicitly extracted, the presence of many external URIs, some pointing to potentially disposable hosting, supports the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://www.pratikchoudhury.com/fckimages/file/57845419175.pdf In PDF document text
    • http://abcgsgeds.friendship-match.com/upload/files/75584883720.pdfIn PDF document text
    • http://hhoasis.org/app/webroot/img/fck/file/7993651921.pdfIn PDF document text
    • http://di-tech.kr/fckeditor/userfiles/file/83726590095.pdfIn PDF document text
    • http://yanartextil.com/firma/files/31476108765.pdfIn PDF document text
    • http://aloeverajuice.cz/files/file/vunifokejibunud.pdfIn PDF document text
    • https://sikahaiphong.com/images/news/files/bexanubekotugawore.pdfIn PDF document text
    • http://polesprogettazioni.com/userfiles/files/loxuwerunurobupuxikite.pdfIn PDF document text
    • https://gastrotest.co/ckfinder/userfiles/files/zuvetawadosunoxot.pdfIn PDF document text
    • http://hodori247.com/uploads/files/goxirefakeses.pdfIn PDF document text
    • http://sfipl.in/userfiles/file/sozizepoduzawa.pdfIn PDF document text
    • http://chrisdepanneservices.com/Sites/cds/files/55360481289.pdfIn PDF document text
    • https://atlas-consulting.ro/fckeditor/fisiere/file/63679691049.pdfIn PDF document text
    • http://trubaopt.ru/content/file/pumufumanija.pdfIn PDF document text
    • http://dasbluemchen.com/1887732956.pdfIn PDF document text
    • http://alexlunacoach.com/img/editor/file/37163530240.pdfIn PDF document text
    • https://ahl2005.com/ckfinder/userfiles/files/61819302907.pdfIn PDF document text
    • http://baigeleather.com/userfiles/file/razuvepapotakejarug.pdfIn PDF document text
    • https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/161458147d99dc---tinuvujasinigunixik.pdfIn PDF document text
    • http://smolninskayahotel.com/userfiles/file/sitimejolodogazimug.pdfIn PDF document text
    • https://bienenaktuell.com/sites/bienenaktuell.com/files/file/kebefuvud.pdfIn PDF document text
    • https://atputasbazes.lv/images/userfiles/files/tozonexifuwopafasor.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=ios+vs+android+market+share+by+countryPDF 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_off0000d11c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD11C 17804 bytes
SHA-256: 3ef60866ec3fc939e438a2f6cf845408eb3f772ad9bd51f8539247af326499b7
font_01_sfnt_off0000fe77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE77 11052 bytes
SHA-256: c58395835f87768f91fd4908ae090b5ac948b2287791a1a7cd83bacfda58703e
font_02_sfnt_off0001180d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1180D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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