Malicious PDF — malware analysis report

Static analysis result for SHA-256 57e4d30659b8ec74…

MALICIOUS

PDF

95.6 KB Created: 2021-07-13 16:55:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: d0aaecf3eee4b820d7bba44a62b903d2 SHA-1: d31d639dd7df7d616b6098fbf4c80fa7ae8dc41b SHA-256: 57e4d30659b8ec74826e68d6878ef4f056e9517b7e769306eefb9b1b5b143145
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external resources, many of which point to compromised WordPress sites hosting other PDF files. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded links suggest an attempt to lure users to malicious content hosted on compromised infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9918

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://thejinglelab.com/wp-content/plugins/super-forms/uploads/php/files/d5i5s8ojrbf1lsvtk6lc38a2q6/fagaluganuvidakosiwotutov.pdf In PDF document text
    • https://abugfreemind.com/userfiles/file/kodedulevamebid.pdfIn PDF document text
    • https://www.gsccn.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a3835f40a10---38737320327.pdfIn PDF document text
    • https://livingcircles.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160c774e52bb53---dutimawidurirulekax.pdfIn PDF document text
    • https://bokseinstituttet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1609534df5d9b7---vojivozesivedoxafosil.pdfIn PDF document text
    • http://ezstreetautosales.com/clients/876244/File/zeteravag.pdfIn PDF document text
    • https://terravistahometeam.com/wp-content/plugins/super-forms/uploads/php/files/6a8273d93e4eadadea335558913c4a7e/mufigekigeled.pdfIn PDF document text
    • http://bociany.sk/media/file/43624713150.pdfIn PDF document text
    • http://cowmoo.org/ckfinder/userfiles/files/xijero.pdfIn PDF document text
    • https://kund-in.com/userfiles/file/virudupakozopogixilataw.pdfIn PDF document text
    • http://math-talk.kr/wp-content/plugins/super-forms/uploads/php/files/v5npisjmpo3ehcjojpiiouipmc/96771866918.pdfIn PDF document text
    • http://boothbayharborshipyard.com/userfiles/file/wegaretewawemu.pdfIn PDF document text
    • http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f3768eb384---68475609465.pdfIn PDF document text
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a68089870ec---47145927663.pdfIn PDF document text
    • http://sushimura1.com/uploads/files/63756796130.pdfIn PDF document text
    • https://www.charroninc.com/wp-content/plugins/super-forms/uploads/php/files/cb94155b47a09540ad086bf373295944/wavepemumebarot.pdfIn PDF document text
    • https://socialacademy.gr/wp-content/plugins/super-forms/uploads/php/files/c0992540f8cfb792ac29ecf0d9e32112/poxuromimeduwovasi.pdfIn PDF document text
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c69f6248f34---57223085216.pdfIn PDF document text
    • http://suapaiatuipelehakefamily.com/clients/80707/File/zanukopumagezomexokose.pdfIn PDF document text
    • http://kagoshimakojintaxi.com/userfiles/file/85423815552.pdfIn PDF document text
    • http://drentmedischadvies.nl/uploads/files/57241028741.pdfIn PDF document text
    • http://erdbau-rauch.at/sugufosijutode.pdfIn PDF document text
    • http://muszempilla.com/files/file/lezim.pdfIn PDF document text
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f540f70918---12692176778.pdfIn PDF document text
    • https://nonbodepsg.com/uploads/files/5901732504.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=somewhere+to+disappear+alec+sothPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00015126.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x15126 18664 bytes
SHA-256: 889bc38c6bdf2d0365bf76316ddb9f130ece50fddf0030f16fc2fa9b582cedea
font_00_sfnt_off0000ef92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF92 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000107a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107A9 10836 bytes
SHA-256: b8adaf6c610ee4a9065fb7a9d6dc246627d3209de8bc6d8884d2ecc4c1647da0
font_02_sfnt_off000120b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120B3 19008 bytes
SHA-256: 0806cb1b9523f5bcf6eba4c2cc7d650bb37b64cfcc8ce7354ea90d4a1175321e

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