Malicious PDF — malware analysis report

Static analysis result for SHA-256 3aed324046aab970…

MALICIOUS

PDF

90.8 KB Created: 2021-09-02 01:07:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 22c132ea612b525cdccd21338a6280ea SHA-1: 0e12dd44280fad0b0a88f2c5ccb0ff87eb542bb7 SHA-256: 3aed324046aab970c977e9a360df026e86377da615e3e2f5b5168bcb8306e7fa
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, indicating a phishing or malware distribution attempt. It functions as a link farm, containing numerous URLs that point to compromised websites, likely to lure victims into downloading further malicious content or submitting sensitive information. The presence of multiple compromised CMS upload links suggests a coordinated effort to host malicious files.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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://wastran.ru/uplcv?utm_term=what+does+declawed+mean+dog PDF link annotation
    • http://penzionnakrizankach.cz/ckfinder/userfiles/files/jujibenudibezuwan.pdfIn PDF document text
    • http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e745db09723---juleruwinuwenuxizomam.pdfIn PDF document text
    • http://ladyvenus.it/userfiles/files/90736524547.pdfIn PDF document text
    • http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a567728abbf---suxufeguliwijawokimejite.pdfIn PDF document text
    • https://ximatinhdongnai.com/app/webroot/files/images/pages/files/1104872361.pdfIn PDF document text
    • http://hoteldarim.ir/basefile/hoteldarimir/files/kedapew.pdfIn PDF document text
    • http://gardenofsound.com/userfiles/files/63395556980.pdfIn PDF document text
    • http://israel-aliya.com/wp-content/plugins/super-forms/uploads/php/files/d86e6521d3032b9bf1a83dea747b2008/11145748868.pdfIn PDF document text
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160ad29bd66ccf---51178447085.pdfIn PDF document text
    • https://bizdrive.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/160da52476ef77---62558890408.pdfIn PDF document text
    • http://fqcycpa.com/jingkelun/userfiles/files/20210610073309.pdfIn PDF document text
    • http://onlineticketreview.com/images/file/baremunimamoledoto.pdfIn PDF document text
    • http://muzeumostrowiec.pl/obrazy/file/bewuderaroje.pdfIn PDF document text
    • http://odesignlab.ru/admin/ckfinder/userfiles/files/sidiwimaxokapapipuw.pdfIn PDF document text
    • https://www.amiunaorchestra.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c2a217260dc---42709710344.pdfIn PDF document text
    • http://www.klpreschool.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072b03f81d1d---dosapimunajexeruna.pdfIn PDF document text
    • https://toananhmedical.com/uploads/files/71519779588.pdfIn PDF document text
    • https://pluviaterra.mx/wp-content/plugins/super-forms/uploads/php/files/63ff328411d9ba45d0a86dad1af9f66f/duzerotavasoneg.pdfIn PDF document text
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609b33fe7df5b---97087871070.pdfIn PDF document text
    • http://cesmclassof68cheyennewy.com/clients/82478/File/44590142333.pdfIn PDF document text
    • http://qtjdb.com/UploadFile/2021/05/12/file/20210512_221813_127.pdfIn PDF document text
    • http://skupka23.ru/upload/m/47702968553.pdfIn PDF document text
    • https://ingatlanfelugyelet.hu/uploads/file/xakujisobavevumofano.pdfIn PDF document text
    • https://bursac.net/userfiles/file/dugorutogufosasudog.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/6243185034.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_off0000ff5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF5E 10704 bytes
SHA-256: ee86e2d73ddaf63e6ab81c9813473e832e2440abf9f1895d17f4a991c068f508
font_01_sfnt_off000117a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117A7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012fb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FB9 17292 bytes
SHA-256: 89f81ba07984b39016b0ba7ae7617d06421378216d09f7ef6dd8cc5067fab6bb

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