Malicious PDF — malware analysis report

Static analysis result for SHA-256 59f81de25d296fca…

MALICIOUS

PDF

88.1 KB Created: 2021-07-14 01:56:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 380c44cc8ce02cd98c3d91442bbbf92e SHA-1: 69a2e0e6ef217a53f5a3378543aad4370b02ecce SHA-256: 59f81de25d296fca31670dcd56f630859aa139d42df6c72e9200574b63976993
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan payload. It contains a link farm pointing to multiple distinct hosts, many of which are hosted on compromised WordPress installations. The primary purpose appears to be redirecting users to other PDF files, likely for further obfuscation or delivery of malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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 http://alternativefitness.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16071847f9c578---peveranitepubunibo.pdf In PDF document text
    • http://ingenermarket.ru/userfiles/pajapidosi.pdfIn PDF document text
    • https://dm288.rs/slicice/file/23391888652.pdfIn PDF document text
    • https://caravanandre.it/wp-content/plugins/super-forms/uploads/php/files/9f141b7446d543ac347698948f39db68/pedikurubupewofuwoxixajik.pdfIn PDF document text
    • http://biatlonbreza.sk/editorfiles/files/jelilugiwadaropun.pdfIn PDF document text
    • http://vote4dannybarry.com/clients/2/2f/2f5d4f67c16906f9b09010289963de11/File/pubuwolusa.pdfIn PDF document text
    • http://fabrykakonwersji.pl/wp-content/plugins/super-forms/uploads/php/files/6ef4e96ca657d254d71852c1b1fd7c60/83104256357.pdfIn PDF document text
    • https://atpl.aero/ckfinder/userfiles/files/98814069635.pdfIn PDF document text
    • https://marwaautorepair.com/nbloom/fckuploads/file/modijukipaguladok.pdfIn PDF document text
    • https://boumqueur-edition.com/upload/fckeditor/file/4382556574.pdfIn PDF document text
    • https://xn--80adj7cxa.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/59fdc0759410c61a2afe9e03eeee099d/28646459808.pdfIn PDF document text
    • http://ipceurope.com/assets/file/11079579202.pdfIn PDF document text
    • http://memphiscentral1969.com/clients/865565/File/46208492033.pdfIn PDF document text
    • https://hyosungulf.com/uploads/file/97930440720.pdfIn PDF document text
    • http://manufim.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160adbf6dc70ac---nariwo.pdfIn PDF document text
    • https://bestcoloringpages.com/userfiles/file/rizegulamogadosafavaduxuk.pdfIn PDF document text
    • https://www.ezhealthcheck.com/wp-content/plugins/super-forms/uploads/php/files/ubc6e5o47nj8sla3o4dci55at6/tuwiwatoxufavo.pdfIn PDF document text
    • https://www.heracles-hotel.eu/wp-content/plugins/super-forms/uploads/php/files/tccs89k0d8fhtarcmua1nc4hpk/jenenom.pdfIn PDF document text
    • https://realestateconnect.pro/wp-content/plugins/super-forms/uploads/php/files/8h60a1oeesehcav6khs5an63j0/29972639484.pdfIn PDF document text
    • https://kodeac.com/wp-content/plugins/super-forms/uploads/php/files/hl6gm987t504596bfgshiskun7/11928762947.pdfIn PDF document text
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dd4863bf55---ruzetoludeduti.pdfIn PDF document text
    • http://teresachild.com/upload/files/30591852427.pdfIn PDF document text
    • https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608930398aaa8---retidawuwubavuxezazan.pdfIn PDF document text
    • http://doreenindiatours.com/userfiles/file/levota.pdfIn PDF document text
    • http://animationcoach.com/userfiles/file/26306956117.pdfIn PDF document text
    • http://mattstergamer.com/wp-content/plugins/super-forms/uploads/php/files/kdicdemocpro1iqejv29gk5hts/94004035764.pdfIn PDF document text
    • https://go2germany.ru/files/file/57835244218.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=parrot+fish+red+seaPDF 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_off0000f1e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1E0 10300 bytes
SHA-256: 9656da13d8e7bb5f9602264ca93a396f05201904043a25997947da8f93aec90b
font_01_sfnt_off0001093c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1093C 18512 bytes
SHA-256: 7136c1fa505341bb39e79eca03d9602af68f5e7f4c867c5532966d29dd23e54d
font_02_sfnt_off00013994.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13994 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.