Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a30c181fa7d2ced…

MALICIOUS

PDF

102.6 KB Created: 2021-07-30 19:06:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 8712a5b5b01667577d2d944fcb5bd172 SHA-1: 4e00797525a745a582dd4e674bce1d3d4ff393a2 SHA-256: 0a30c181fa7d2ced31b814846070659b0b88b079a58bac83ceb8768582846b08
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple external websites, some hosted on compromised CMS uploads. The presence of external URIs and link farm indicators suggests the primary goal is to redirect users to potentially malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://medvor.ru/uplcv?utm_term=a+christmas+carol+charles+dickens+movie PDF link annotation
    • https://angkortaxiservice.com/userfiles/file/lamewa.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/c7af8901dcda91feaad0ea670ac43cef/17464128790.pdfIn PDF document text
    • http://security-m.jp/tool/images/file/funamimusi.pdfIn PDF document text
    • http://techscreening.com/userfiles/files/dogerukoka.pdfIn PDF document text
    • http://www.publicitymailing.ie/wp-content/plugins/formcraft/file-upload/server/content/files/1608649329452f---18927124271.pdfIn PDF document text
    • http://staractivecollection.com/resimler/site/files/wepibulodipiju.pdfIn PDF document text
    • https://247hvac.ca/fabulous1/uploads/files/6938549039.pdfIn PDF document text
    • http://msinternationalbeautypageant.com/clients/8/8c/8c0f0497d7166b07b5568c04be8084ca/File/difixafuvosorafuliroxozo.pdfIn PDF document text
    • https://cualuoihoanmy.com/uploads/userfiles/file/jazejaku.pdfIn PDF document text
    • https://fotobolfestmeny.hu/mvc/userfiles/file/69692088595.pdfIn PDF document text
    • https://classconnbio.com/img-jacson/files/rivuwudat.pdfIn PDF document text
    • http://okeefesreef.com/ckfinder/userfiles/files/titinugemufujewe.pdfIn PDF document text
    • http://abwjefferson.com/uploads/files/86709855435.pdfIn PDF document text
    • http://globaltruthmediagroup.com/clients/a/aa/aa8380eac451876ae6ab993bf3a720d6/File/35207844011.pdfIn PDF document text
    • https://baoyi-chuck.com/ckfinder/userfiles/files/33650179703.pdfIn PDF document text
    • http://skup-laptopow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607faf92123b5---31015993716.pdfIn PDF document text
    • https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16074ac76dd49e---85441093556.pdfIn PDF document text
    • http://ladyqueen.it/userfiles/files/xogojifawunopupop.pdfIn PDF document text
    • http://longhornrings.com/clients/0/08/08da48574b41509ac7bedcf2500dc652/File/48021532653.pdfIn PDF document text
    • https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/367a54650cb099034b40146d165d1bce/54224041550.pdfIn PDF document text
    • https://mides.vn/images/ckeditor/files/besatozuguxikal.pdfIn PDF document text
    • https://www.costaverde.it/wp-content/plugins/formcraft/file-upload/server/content/files/16077276f780dc---79422617622.pdfIn PDF document text
    • http://fongyoskert.hu/userfiles/files/fusifuxarivakurusiwid.pdfIn PDF document text
    • http://historico.uts.edu.co/portal/app/ckfinder/userfiles/files/najufuravuja.pdfIn PDF document text
    • http://geology.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160864eb3b1204---xezakalixijuge.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_off00012da2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DA2 10776 bytes
SHA-256: 53a7d547d2ca2ad6824f87fd4f9882c90c94abb6815b37b2b43ced15415ea5cb
font_01_sfnt_off00014655.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14655 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00015e67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15E67 16660 bytes
SHA-256: 4c8770a3d026f630549017982adfc55dcb7ba7ffc0c8968249d77322f83f0447

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