Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ad9e02b422ec50e…

MALICIOUS

PDF

77.8 KB Created: 2021-09-01 16:55:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 573416ad6c2474fb5d8bf7fd7ea3b38f SHA-1: 57bba56a18450163e271e11a742762ab31e5ee93 SHA-256: 7ad9e02b422ec50e5051fe523945e8e15ba16e6ee4b538db1e9f28a6f020bf41
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It functions as a link farm, containing numerous URLs pointing to various domains, many of which appear to be compromised or disposable. The presence of multiple links to WordPress upload directories and the use of UTM parameters suggest an attempt to lure users to potentially malicious content, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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://goldengrowers.com/wp-content/plugins/super-forms/uploads/php/files/65420bb2853cb79468f88c2b82e999df/fonadufoguso.pdf In PDF document text
    • http://saothienemb.com/uploads/images/files/rurowisubebekaporelifuzab.pdfIn PDF document text
    • https://alice-immo.com/userfiles/file/58585853393.pdfIn PDF document text
    • https://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608041691e38f---tozulugajuzaxirezutopur.pdfIn PDF document text
    • https://vashadvokat82.ru/wp-content/plugins/super-forms/uploads/php/files/ffef9d50a14055cc8b0b2563caceee24/19844199072.pdfIn PDF document text
    • http://dydlhx.com/upfiles/file///46658407066.pdfIn PDF document text
    • http://alphasigmaoverseas.com/userfiles/file/mofobipaxizepe.pdfIn PDF document text
    • https://study4student.com/cache/fck_files/file/11304693739.pdfIn PDF document text
    • https://hartwellcook.com/wp-content/plugins/super-forms/uploads/php/files/ff8228e95254cdfaca7131b23d2b2f3b/ganon.pdfIn PDF document text
    • http://nc-israel.ru/upload/files/someraxaxarexogejavuriw.pdfIn PDF document text
    • http://villaturri.it/wp-content/plugins/formcraft/file-upload/server/content/files/160ac171d1f36b---doxil.pdfIn PDF document text
    • http://md-servicios.com/userfiles/file/tukefazenumaratu.pdfIn PDF document text
    • http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/160c40d3beb9cc---18418539921.pdfIn PDF document text
    • http://csc028.com/userfiles/file/20210616075650_j1bukp.pdfIn PDF document text
    • http://austria-ex.com/images/blog//file/46911500707.pdfIn PDF document text
    • http://jfac.kr/ckfinder/userfiles/files/dedilisopesu.pdfIn PDF document text
    • http://orgue-chantepie.info/FCKeditor/upload/file/29754874928.pdfIn PDF document text
    • http://www.trisad.kz/ckfinder/userfiles/files/gigajurogapetubimakimod.pdfIn PDF document text
    • http://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608a780b59b08---dosopagutop.pdfIn PDF document text
    • http://alisawedding.com/upload/users/files/luzuv.pdfIn PDF document text
    • https://nuevocoach.co.uk/wp-content/plugins/super-forms/uploads/php/files/03edc436bd8c6aa87b6079623fcbbacf/31385196955.pdfIn PDF document text
    • http://budoprojekt.eu/obrazy/file/8151574851.pdfIn PDF document text
    • http://fairway.cc/images/blog//file/71465009302.pdfIn PDF document text
    • https://cullinanconstruction.com/wp-content/plugins/super-forms/uploads/php/files/n0g2m0g8p7ljrnp80m1gshc0n8/zalivewezalarunalerus.pdfIn PDF document text
    • http://www.putnamtaxi.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606fc80117b1a---fuvuvemosavez.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=temple+run+2+unlimited+gems+and+coinsPDF 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_off0000cbe5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBE5 11040 bytes
SHA-256: b7c4bc056a048fb85424608c63a2a140efc7c3b556b53dbfb8ded669ac5c658b
font_01_sfnt_off0000e55e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE55E 16764 bytes
SHA-256: b7d8d8a1c1c0df185c70f7c31f89249a63f26e40c8f939f39589281a16da5db7
font_02_sfnt_off000110ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110CA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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