Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d6e386d4249fb72…

MALICIOUS

PDF

83.1 KB Created: 2021-09-03 09:02:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 418f6570446c474eb6e4dfc3ffe73931 SHA-1: 09649c87305783185fcb2f54ef97ff0f2714a028 SHA-256: 0d6e386d4249fb72b7e4f9bec0d406ddccb33d33451c21d40599c4aa4edaa2ba
156 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://www.haievent.com/wp-content/plugins/super-forms/uploads/php/files/72mgkprfo213scpf6qdau3dlrj/71842355983.pdf In PDF document text
    • http://www.fotografoeventimilano.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab328513a94---78253012867.pdfIn PDF document text
    • https://flycam.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1607b627e5a65d---danexef.pdfIn PDF document text
    • https://maidintown.co.uk/wp-content/plugins/super-forms/uploads/php/files/bea01ab749ed15a4a41fc25ac4deeb20/78281380826.pdfIn PDF document text
    • https://www.litesourcenc.com/wp-content/plugins/super-forms/uploads/php/files/3b9889bb80b2363304897387b89701d1/80327989420.pdfIn PDF document text
    • http://katachizu.com/img/news/files/65794782227.pdfIn PDF document text
    • http://www.americaninvest.net/upls/files/vigeloxurexakopiwijaseda.pdfIn PDF document text
    • https://dichvumayphoto.vn/webroot/img/files/13478683600.pdfIn PDF document text
    • http://grupopiscis.com/upload/files/torokezukazajokixabaxob.pdfIn PDF document text
    • http://ashole.hu/UserFiles/File/1733106773.pdfIn PDF document text
    • http://babywagen24.de/userfiles/file/28821633844.pdfIn PDF document text
    • http://krakow4you.pl/krakow/files/35545907076.pdfIn PDF document text
    • http://www.marcelasemper.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1c68973c27---72206048036.pdfIn PDF document text
    • http://salonlomi.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160a3aa530300e---pufesoda.pdfIn PDF document text
    • https://aprenda-atdi.com/uploads/files/soxavufotagijurilapuge.pdfIn PDF document text
    • http://cokhitienvuong.com/uploads/files/64626149694.pdfIn PDF document text
    • https://xn--80adj7cxa.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/2245756a1da46763277435958dba5e06/susigosigefejesifo.pdfIn PDF document text
    • http://www.olivier-frey.ch/user/web/file/61257463479.pdfIn PDF document text
    • https://melnikhouse.com/userfiles/file/paraguvunukimebow.pdfIn PDF document text
    • http://aksaaydinlatma.com/img/editor/image/file/jajofetozulirikitasonepo.pdfIn PDF document text
    • http://czyxchem.com/upload/files/wepuw.pdfIn PDF document text
    • http://garmagostaran.com/Upload/file/xupokirolarasus.pdfIn PDF document text
    • https://zemiigori.com/uploads/file/jefewiwojakofidukiwum.pdfIn PDF document text
    • http://avandcie-automation.com/ckfinder/userfiles/files/runajik.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=spelling+test+worksheets+to+printPDF 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_off0000de23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE23 18784 bytes
SHA-256: e3826434b7763798a7bd107bf4ff87787c450abaa6e91b699ea5dc43c28ec4fa
font_01_sfnt_off00010edd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EDD 10624 bytes
SHA-256: abbe0934ef1e68f9ca5d9151498c5385e7a8149542fa76c1fbffc6a6d89ebc63
font_02_sfnt_off00012721.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12721 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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