Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e06a9b39d3a2571…

MALICIOUS

PDF

86.3 KB Created: 2021-07-30 07:54:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: f8925ab9cc232862904044a8366e2c91 SHA-1: 6674da52b35f411fa507c4e19a1f8f8dab290df9 SHA-256: 0e06a9b39d3a2571b91e0c1181aad5346ac36df7dc2e52cbe352a1afb93afdfd
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF was flagged by multiple heuristics as a link farm, with many URLs pointing to compromised CMS uploads and disposable hosting. The ML classifier and ClamAV also strongly indicated maliciousness, specifically identifying it as a phishing trojan. The file's purpose appears to be to redirect users to other malicious PDF files hosted on compromised websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://leicht-spb.ru/wp-content/plugins/super-forms/uploads/php/files/f6294a7f8c071d61c6154ae7acb478f8/loretazemisozorubapig.pdf In PDF document text
    • https://akapacha.com/userfiles/file/muxuwibitexexese.pdfIn PDF document text
    • https://brokenspoke.com/wp-content/plugins/super-forms/uploads/php/files/a344a57054d2abe771defcdc241a189d/62320693248.pdfIn PDF document text
    • http://n-production.com/upload/fckeditor/file/53054962695.pdfIn PDF document text
    • https://advance-pack.com/editor_upload/file/5168490824.pdfIn PDF document text
    • https://www.glasswindowequipment.com/wp-content/plugins/super-forms/uploads/php/files/fde433e4a5394a27e08a004d6b18bc74/lutupebive.pdfIn PDF document text
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1608f1ed1bf471---36091284253.pdfIn PDF document text
    • http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c11dc879793---76690713016.pdfIn PDF document text
    • http://uniroll.pl/user_images/file/segabisimoxolixeku.pdfIn PDF document text
    • https://kakvkusno26.ru/wp-content/plugins/super-forms/uploads/php/files/f959075e34cb97c782e13884028a62b6/zifimamifam.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/b8lh5025ho4bqinarlcmj3ls94/26217912124.pdfIn PDF document text
    • http://fastgood4cheap.com/clients/4890/File/19585022547.pdfIn PDF document text
    • https://hunghiephuylog.com/upload/files/bekizaweretikugaziviwipe.pdfIn PDF document text
    • https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b435c20fb0c---kaserojale.pdfIn PDF document text
    • http://stepsforstarlight.org/clients/c/c6/c668404594a1c08d975ab50c7bec58f6/File/19280340738.pdfIn PDF document text
    • http://toddfamilyreunion.com/clients/4/48/482e924d5a052aa4a0c13eb8a30e0bc8/File/gugajijud.pdfIn PDF document text
    • https://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/160999fd0db965---29791232196.pdfIn PDF document text
    • http://instant-image.net/UserFiles/Site/File/jarewamomobodat.pdfIn PDF document text
    • http://www.nanodrywash.com/wp-content/plugins/formcraft/file-upload/server/content/files/160de1015b2cd7---99439103266.pdfIn PDF document text
    • https://kodeac.com/wp-content/plugins/super-forms/uploads/php/files/2o1j68f69745lrlsoo0h34g8sk/44933180920.pdfIn PDF document text
    • http://samuiluxurytravel.com/Uploads/file/25655237282.pdfIn PDF document text
    • http://pillshop.ru/uimg/files/japatosimenimovopisebud.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=mixed+conditionals+english+grammar+exercisesPDF 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_off0000eddb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDDB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000105ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105ED 17284 bytes
SHA-256: d39007bc3d0337700f742f6dbd04efb1e993ba9e450fcf61efb5964ee1b0601f
font_02_sfnt_off00013278.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13278 10912 bytes
SHA-256: f73e461b714f3879884c34c0090e88147221a92eb70c88a8ebb44dbb9d97c424

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