Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ea26066d61eb118…

MALICIOUS

PDF

76.2 KB Created: 2021-09-09 01:45:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 6c46907b07dc0dd7cdae31ac25d78486 SHA-1: 208649d0a40264db5cab44a46645d916a09094b3 SHA-256: 3ea26066d61eb1184d0a4a383ea910e43bc7b5c6233d6eaef6314a5620c0802c
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs, many of which are hosted on disposable domains and appear to be part of a link farm, a common tactic for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious sites, likely for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

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 https://allytemp.ru/uplcv?utm_term=tutalhub+prince+of+persia+download PDF link annotation
    • http://songpinhao.com/userfiles/files/wotefape.pdfIn PDF document text
    • https://careerroots.net/ckfinder/userfiles/files/8328964945.pdfIn PDF document text
    • https://uangraja.com/contents/files/zovivubipakesazelabuwozuw.pdfIn PDF document text
    • https://habibitoursegypt.com/ckfinder/userfiles/files/4006487309.pdfIn PDF document text
    • https://www.reliancecareuk.com/wp-content/plugins/super-forms/uploads/php/files/cb0ccd44e99dd94356fd518d10a5542e/bajukesajuf.pdfIn PDF document text
    • http://hitmet.slektenkaas.com/bilder/file/datosafimepoketexugifoge.pdfIn PDF document text
    • https://cvenhancer.com/wp-content/plugins/super-forms/uploads/php/files/ccd82c6542c51418f8300996ffa88328/kuzudirilarapuwo.pdfIn PDF document text
    • http://meadescafe.com/userfiles/file/69164300472.pdfIn PDF document text
    • https://ckmandarin.com/uploads/samurarire.pdfIn PDF document text
    • http://cleversystems.ru/userfiles/file/tumadupomas.pdfIn PDF document text
    • http://fs-select.com/images/blog/file/nononiwezaduveko.pdfIn PDF document text
    • http://myflora888.com/ck_files/files/duvuzodimo.pdfIn PDF document text
    • http://quartierdete.fr/uploads/fckeditor/file/51288867281.pdfIn PDF document text
    • http://lncxjzxxw.com/upload_fck/file/2021-9-2/20210902051918121297.pdfIn PDF document text
    • http://atenngo.com/admin/sites/site/documents/17233513323.pdfIn PDF document text
    • http://rungruangsteel.com/public/upload/userfiles/files/39290896730.pdfIn PDF document text
    • http://dmkaudit.sk/101/upload/file/69123610558.pdfIn PDF document text
    • http://koryosushi.com/uploads/files/femisosawogokiwasojutu.pdfIn PDF document text
    • http://scales-center.com/shop/fck_file/file/wenevaz.pdfIn PDF document text
    • https://triptoboloyfoundation.org/editorsfiles/files/mekijezeveto.pdfIn PDF document text
    • http://sake2metustin.com/uploads/files/54908471576.pdfIn PDF document text
    • https://shellserva.nl/docs/Image/file/saxusoletosulira.pdfIn PDF document text
    • http://onelove.cz/file/kebokisuru.pdfIn PDF document text
    • https://tfsroanoke.com/home/tfs/public_html/new/ckfinder/userfiles/files/42427358490.pdfIn PDF document text
    • https://latgalesamatnieki.lv/files/file/badolipajixuxalexijifuwi.pdfIn PDF document text
    • http://195exim.com/datas/files/19880937899.pdfIn PDF document text
    • 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_off0000c641.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC641 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000de58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE58 11008 bytes
SHA-256: 3b8353f9514022bd44db88300881510ebc48c3c6d39f82137dce7bd8f2d62bcf
font_02_sfnt_off0000f7aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7AA 16860 bytes
SHA-256: 0ac5a8bf47f2cbbb950f9d3d147d377a42d6d0e08f31e231f291b33dd44abad7