Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5ad227cab7b4baf…

MALICIOUS

PDF

69.9 KB Created: 2021-09-25 20:03:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 4f25a41d5e54c2dbdc4598de07b7334d SHA-1: 00cab028911bdddb6a73e54ae165e5690bf9fcfb SHA-256: c5ad227cab7b4baf258c3724256f9ad6ea782d17d0d6fee0c2369e979bd9f6c3
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It contains numerous external URIs and link farms pointing to potentially compromised websites, suggesting a phishing or malware distribution scheme. The presence of embedded URLs and the nature of the heuristics indicate that the PDF likely serves as a lure to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9916

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://laborke.ru/uplcv?utm_term=paw+patrol+putlocker PDF link annotation
    • https://partroyfuneralhome.com/partroy/assets/file/39571991614.pdfIn PDF document text
    • http://edwindijk.nl/home/edijk/domains/edwindijk.nl/public_html/uploads/file/48034617947.pdfIn PDF document text
    • http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16148196aef674---43407551986.pdfIn PDF document text
    • https://tfsroanoke.com/home/tfs/public_html/new/ckfinder/userfiles/files/xajoxorosufonibebame.pdfIn PDF document text
    • http://chafewyuok.handysociality.com/upload/files/futipodibuwexufizo.pdfIn PDF document text
    • http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1613db6c0efd69---24830103005.pdfIn PDF document text
    • http://85560891.com/upfolder/e/files/20210912135205.pdfIn PDF document text
    • https://lorus.rs/files/javirijilozanogijir.pdfIn PDF document text
    • https://tyko.pl/userfiles/file/famikizatimadubav.pdfIn PDF document text
    • http://edisonprivateschoolbeta.com/cote_dor_import/admin/ckfinder/userfiles/files/49898461600.pdfIn PDF document text
    • http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1613d337a32108---40203711634.pdfIn PDF document text
    • http://www.slenderclub.cz/ckfinder/userfiles/files/wufimojediver.pdfIn PDF document text
    • https://elemental-ia.com/userfiles/file/zerolepobigoj.pdfIn PDF document text
    • http://piri-piri.pl/ckfinder/userfiles/files/kiriboxaxowidowefemun.pdfIn PDF document text
    • http://papienbanana.com/user_file/file/94816617073.pdfIn PDF document text
    • https://goacetours.com/ckfinder/userfiles/files/92128152803.pdfIn PDF document text
    • http://dunakeszi.varosom.hu/userfiles/files/mizowupika.pdfIn PDF document text
    • http://zenkatsu.dk/files/83287864877.pdfIn PDF document text
    • http://celeb.huh.hu/UserFiles/File/farajivujuvotanofepuvo.pdfIn PDF document text
    • https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613440ee87691---virepoxofojiwufomovu.pdfIn PDF document text
    • http://inhome360.ru/admin/ckfinder/userfiles/files/50948275790.pdfIn PDF document text
    • http://www.rosabrockenhaus.ch/ckfinder/userfiles/files/lilidenisonisupojesajuzo.pdfIn PDF document text
    • https://cmoretv.com/userfiles/56006239474.pdfIn PDF document text
    • http://romengo.com/ckfinder/userfiles/files/22322489930.pdfIn PDF document text
    • https://albertscience.com/ckfinder/userfiles/files/matokaparuzuxebaziguxane.pdfIn PDF document text
    • http://belean.pl/userfiles/file/fotutesa.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_off0000b42c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB42C 14496 bytes
SHA-256: df3236451eca78d37f0e9661b4cea3f903fa8907894eacc390251a083434cba2
font_01_sfnt_off0000d88a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD88A 10284 bytes
SHA-256: bd85bcf5f5b6df82329b81362d3f204e5ee22371d76fefdf0a62fba7cbebf61e
font_02_sfnt_off0000eff4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFF4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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