Malicious PDF — malware analysis report

Static analysis result for SHA-256 72fcc2ef68beacb5…

MALICIOUS

PDF

89.9 KB Created: 2021-08-08 20:04:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: b8b79133cf5ae56cbf8d9749f68141ec SHA-1: 511473e5ee3658310a77dd3df933ccb1739a44ec SHA-256: 72fcc2ef68beacb5b59c194458117a18670371c00852f26a6b0ed7e1f69adf46
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, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous embedded URLs that point to compromised websites. These sites, in turn, host further PDF files, suggesting a multi-stage distribution or phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://nowackleverkusen.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607e6108e8a60---mewewiragewiresitexigadem.pdf In PDF document text
    • http://soflocops.org/clients/83264/File/26973638793.pdfIn PDF document text
    • http://toanthinh.vn/webroot/img/files/53823934344.pdfIn PDF document text
    • https://hoanghaie.com/Images_upload/files/24962693465.pdfIn PDF document text
    • https://xn--78-6kce7dfhb9dwb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/e5d5b3fecab32240bb830d50c37c586f/31157405311.pdfIn PDF document text
    • https://journeypeople.cc/wp-content/plugins/super-forms/uploads/php/files/648043cbe3df5378f5c5849075f7280e/95542391100.pdfIn PDF document text
    • http://www.gabrielamaciel.net/images/content/file/logeso.pdfIn PDF document text
    • http://rgn2u.com/userfiles/files/2553300242.pdfIn PDF document text
    • http://bigandtallking.com/userfiles/file/xomizemozawagutanil.pdfIn PDF document text
    • https://sayurmateng.com/contents//files/vusowixojewoliwaxofate.pdfIn PDF document text
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607b09748d3d8---79131752916.pdfIn PDF document text
    • http://alnadaoil.com/userfiles/file/41099403360.pdfIn PDF document text
    • http://woods-china.cn/ci2/userfiles/files/20210617225835.pdfIn PDF document text
    • http://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e6807064aa---kazapowoba.pdfIn PDF document text
    • https://lapalettedesarts.fr/gestion/file/fozibizovotezoxunamezo.pdfIn PDF document text
    • https://publicbridge.pl/userfiles/file/jiwesewusa.pdfIn PDF document text
    • https://indacphuc.com/wp-content/plugins/super-forms/uploads/php/files/8c56ss2fe5aolcceuoem4000i4/92522925093.pdfIn PDF document text
    • http://sportingclubalbinia.eu/userfiles/files/8663189199.pdfIn PDF document text
    • http://auto-spec.ca/fck/file/pukaradetol.pdfIn PDF document text
    • http://pvsystreports.com/wp-content/plugins/super-forms/uploads/php/files/80d935j5bl53k56g3ee8mv1bt0/nemowaxesevukokima.pdfIn PDF document text
    • https://big-cash.de/wp-content/plugins/super-forms/uploads/php/files/liuf4u12plqfqb2lj1qr1c9ule/loxubavexovomowiguxaba.pdfIn PDF document text
    • http://crystalsteakandstogie.com/clients/1/1d/1dbb6d5698303b6304ae84622e226a19/File/loxakekulemigikazo.pdfIn PDF document text
    • https://elitestrategyglobal.com/wp-content/plugins/super-forms/uploads/php/files/cfa50bb95fff6c8b49de82aecc20f0a9/vagagigog.pdfIn PDF document text
    • http://bfr-bialapodlaska.pl/userfiles/file/jifuka.pdfIn PDF document text
    • https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076ab743a93c---80579290928.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=alg%C3%A8bre+de+boole+cours+et+exercices+corrig%C3%A9s+pdfPDF 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_off0000f581.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF581 18940 bytes
SHA-256: c906c32673e32b47670cdd4c95ec40f8dbe9392ab3af739991349860996037e1
font_01_sfnt_off000125af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125AF 11164 bytes
SHA-256: c0ac84673916d1de954d2d178fd0e27ca913dc9fd7113ab6eeb72646f465b665
font_02_sfnt_off00013ed1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13ED1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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