Malicious PDF — malware analysis report

Static analysis result for SHA-256 785aca00abd1ec54…

MALICIOUS

PDF

87.3 KB Created: 2021-07-14 07:52:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 5bd9ba9c50d1ecf6fd142ff5bd4d055e SHA-1: 87afe57ac76f430b24cc573849e93572cd789506 SHA-256: 785aca00abd1ec54087e6f45c76236678335bcc7afc45beda6fb4551f03848f5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, directing users to multiple compromised websites and disposable hosting domains, likely for malware distribution or credential harvesting. The presence of external URIs and link farm heuristics strongly suggests a phishing or malicious redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://irlanc.ru/uplcv?utm_term=does+brandon+flynn+have+aids PDF link annotation
    • http://ptaki.info/imgekoprojekty/files/41350628569.pdfIn PDF document text
    • http://drukarnia-skawina.pl/app/webroot/media/files/patuzajilem.pdfIn PDF document text
    • http://showpalmedical.com/userfiles/daxibejuned.pdfIn PDF document text
    • https://kantankacreative.com/wp-content/plugins/super-forms/uploads/php/files/b5b21e72e879a6d7cc8deff44b6f24b6/fugaxapunurobo.pdfIn PDF document text
    • http://kunbot.com/upload/files/82132602076.pdfIn PDF document text
    • https://gaseg.com/wp-content/plugins/super-forms/uploads/php/files/1kqjkjme67dchsms3fre8btu1e/pebawagugenakuke.pdfIn PDF document text
    • http://fontanarosaserigrafia.it/userfiles/file/7056882758.pdfIn PDF document text
    • https://lostsoulsmemorialnj.org/wp-content/plugins/super-forms/uploads/php/files/eeda25ce1af7814f844e1a678a05d7a6/funilaw.pdfIn PDF document text
    • http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d86e390ef60---mimavene.pdfIn PDF document text
    • https://thehamptonsbloomington.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608442f283b18---62448852184.pdfIn PDF document text
    • http://otoozevran.com/resimler/files/70692266443.pdfIn PDF document text
    • http://alarcon-v.com/editor_upload_image/file/80572927612.pdfIn PDF document text
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/29bb21057b56e36aac46ad646b06e9dd/zotixesanubekifemo.pdfIn PDF document text
    • http://veterina-hrib.cz/user-uploads/files/82603247647.pdfIn PDF document text
    • http://agenziaimmobiliarecannavo.eu/userfiles/files/sajumizokegupivepoponu.pdfIn PDF document text
    • http://lbtech.kr/upfile/files/molosawubewuxoj.pdfIn PDF document text
    • https://asigurareingermania.ro/wp-content/plugins/super-forms/uploads/php/files/do43e8q0kuqe2n7763io3vbmeo/judofoteloteli.pdfIn PDF document text
    • https://mk-sito.it/uploads/file/rozelugezuwiwud.pdfIn PDF document text
    • https://skazkavdom.com/wp-content/plugins/super-forms/uploads/php/files/db6c74bba60379bc3aaab7ed23587e4b/kabukogo.pdfIn PDF document text
    • https://indikino.com/ckfinder/userfiles/files/35628218410.pdfIn PDF document text
    • https://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/n34jqi595pdcdbuat339kp8cgb/22225369552.pdfIn PDF document text
    • https://asigurareingermania.ro/wp-content/plugins/super-forms/uploads/php/files/os3i0rio0cht8c53caadhegb51/zevigesenakurufisamor.pdfIn PDF document text
    • http://asianaccounting.com/admin/fckeditor/userfiles/file/wedexatapofoxudabu.pdfIn PDF document text
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/160761931e72cb---jibasadijekenar.pdfIn PDF document text
    • https://goez1.com/10005001208290177/ckfinder/userfiles/files/nixebegusanuwevaniz.pdfIn PDF document text
    • http://www.sevenchurchestour.net/seven/wp-content/plugins/formcraft/file-upload/server/content/files/16080e969c1172---todezabulujibudu.pdfIn PDF document text
    • http://s292376414.onlinehome.fr/datas/imgmail/file/64578531260.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_off0000f2a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2A8 17104 bytes
SHA-256: de6f1ff5a66a392bc14257dae93863cbe78f6baf3dfb4d6cbb66a370099bedb9
font_01_sfnt_off00011f51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F51 10672 bytes
SHA-256: 0785ed9196298c4dc633d6367b2897e2f5c46ad15194bb2b810e04ad891e5754
font_02_sfnt_off000137b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137B4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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