Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ada388b3cea4708…

MALICIOUS

PDF

85.9 KB Created: 2021-08-20 21:49:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-16
MD5: acfb7eb46d676e27d70dcd06eac5c041 SHA-1: 4be21dd902e042d5b9de9243f7fcb4f4ada889ea SHA-256: 5ada388b3cea470844172c7ab0976f70347a8b2bcbc4ea8bffaf7f004af3c0a8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. Several heuristics indicate the PDF is a link farm hosted on compromised or disposable domains, likely intended to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics suggest an attempt to distribute further malware or conduct phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9848

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 http://familiegravesen.dk/ckfinder/userfiles/files/26670008243.pdf In PDF document text
    • https://bringem.de/wp-content/plugins/super-forms/uploads/php/files/692cd9a1ece974b1bf65a691349547da/61551548130.pdfIn PDF document text
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608a3c32b6244---welemamogeluvezizunefad.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/f7qoj909v3qdf4icirsmgtgcr9/wakujexozagifikovigagif.pdfIn PDF document text
    • http://tw-sincere.com/upfiles/editor/files/49593672960.pdfIn PDF document text
    • https://healthmatters.me/userfiles/file/96551840122.pdfIn PDF document text
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c532be1b30e---foxugosateletos.pdfIn PDF document text
    • https://groupunsur1.com/contents//files/kiwerezuwifipin.pdfIn PDF document text
    • https://onderdurdu.com/upload/ckfinder/files/28510158625.pdfIn PDF document text
    • http://scamps.biz/userfiles/file/fitomujaridumivunututak.pdfIn PDF document text
    • http://associacaoguainumbi.org.br/wp/wp-content/plugins/formcraft/file-upload/server/content/files/160ac7c14b1249---12374406424.pdfIn PDF document text
    • http://sugarfree-gelato.com/upload/file/vujetajepor.pdfIn PDF document text
    • http://baaningdoi.com/file_media/file_image/file/raraxufobumob.pdfIn PDF document text
    • http://clair-environnement.eu/catalogue_dynamique/file/divuzuruvome.pdfIn PDF document text
    • http://www.ctnphrae.com/ckfinder/userfiles/files/tokibed.pdfIn PDF document text
    • http://wenxuezj.com/images/File/wajoromimisejitomugosij.pdfIn PDF document text
    • http://arcenevents.nl/site/upload/files/12609609042.pdfIn PDF document text
    • http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1607074d86ed31---7151243735.pdfIn PDF document text
    • https://118highschool.am/wp-content/plugins/super-forms/uploads/php/files/b0fa6ca9b10be3f4e4cf6a568ff855b4/74291825561.pdfIn PDF document text
    • http://hangquangauto.com/files/kutowasutu.pdfIn PDF document text
    • http://adams-gold.ru/archive/image/file/kegol.pdfIn PDF document text
    • https://space1500.com/wp-content/plugins/super-forms/uploads/php/files/1a406fb0b77a957d8cbe1bbcf62c131f/fopodukegonulusefutuxika.pdfIn PDF document text
    • http://immobilieninvestors.eu/userfiles/file/4753390049.pdfIn PDF document text
    • http://bularz-auto.pl/images/userfiles/file/raxazulovisuz.pdfIn PDF document text
    • https://www.sabiamente.es/wp-content/plugins/formcraft/file-upload/server/content/files/16079dc90c6665---20865564649.pdfIn PDF document text
    • https://kachhiproperties.com/wp-content/plugins/super-forms/uploads/php/files/8jtk8a6rth14dmfe7h9mmkaub2/66130804601.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=elan+touchpad+driver+windows+10+64-bit+acerPDF 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_off0000e731.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE731 18304 bytes
SHA-256: 7f1cb9b40d9decd4d9b9530a71180c968cfaab97f16d71b8bca66d92b6e1cea3
font_01_sfnt_off000116ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116CA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012ee1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EE1 11440 bytes
SHA-256: 1b30b8d630c263c3f0ed9bca17ca443f6374d068e8d74350a97792ac513592cc

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