Malicious PDF — malware analysis report

Static analysis result for SHA-256 feb4025f8f352a56…

MALICIOUS

PDF

79.6 KB Created: 2021-09-12 07:15:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 48758517625d3b4f7f7ef43678c4ff65 SHA-1: 9f2f14aed9d958aecb9af62ba9a5805bcf660e47 SHA-256: feb4025f8f352a56e9ec2982a5585f032fc62326bd45e5c29ff9902b4ae80aaf
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs, many of which point to potentially malicious or disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of an attempt to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://lmetinternationalschool.in/ckeditor/ckfinder/userfiles/files/36795427493.pdf In PDF document text
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/16139ed412fe6d---motiwudejomuxopobewetele.pdfIn PDF document text
    • http://boekenwinkelindex.nl/images/uploads/sojozodinu.pdfIn PDF document text
    • http://superazs.ru/images/news/file/42386900245.pdfIn PDF document text
    • https://homeuu.biz/upload/ckeditor/pages/files/98012696380.pdfIn PDF document text
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613032a01d726---rutinifimukakepasep.pdfIn PDF document text
    • https://apc-algercentre.dz/ckfinder/userfiles/files/12695750711.pdfIn PDF document text
    • https://mimpiindahsatu.com/contents/files/gixosufareli.pdfIn PDF document text
    • https://polymadeniyaglar.com/fckeditor/userfiles/file/99629249592.pdfIn PDF document text
    • http://savvyais.com/userfiles/file/81462112799.pdfIn PDF document text
    • https://csmgh.net/pevron/www/img/file/83463383792.pdfIn PDF document text
    • http://z500.si/files/65917787613.pdfIn PDF document text
    • https://rubfila.in/files/file/sakodofoliv.pdfIn PDF document text
    • https://extremedriveline.com/ckfinder/userfiles/files/96138053566.pdfIn PDF document text
    • http://www.schule.havonix.com/ckfinder/userfiles/files/zomeni.pdfIn PDF document text
    • http://4els.ru/uploads/images/files/natizasak.pdfIn PDF document text
    • https://at1apigroup3.com/contents/files/57694364369.pdfIn PDF document text
    • http://orthodoxvaidikasanghom.org/userfiles/file/2898666951.pdfIn PDF document text
    • http://masterkontroll.hu/ckfinder/userfiles/files/82995647574.pdfIn PDF document text
    • http://xn--80aer5aza.xn----htbdepbihnfb8cyg.xn--p1ai/ckfinder/userfiles/files/67057226986.pdfIn PDF document text
    • http://elpollopaulino.com/cenavarra_userfiles/files/lipezeni.pdfIn PDF document text
    • https://namphuctourist.com/userfiles/file/vikowibegotuta.pdfIn PDF document text
    • http://gbfrjournal.org/pds/userfiles/files/tuzujesisojuxepime.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=zee+tamil+tv+shows+listPDF 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_off0000d342.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD342 17804 bytes
SHA-256: 3b142ac77aed50538f994807e44ec5f683bf266d21a7f7c7355b80edaf92c6ba
font_01_sfnt_off00010154.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10154 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001196b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1196B 10284 bytes
SHA-256: 48ef743ca0fa369de03773403248533717f5ffe8b22f46a3d19ed06624799fca

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