Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ceb31cd5712f5de…

MALICIOUS

PDF

73.1 KB Created: 2021-10-01 00:15:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 2ffbd4a6758987d41f1b5661e19808a6 SHA-1: f489d8d03bdc1f2618c79576629426ba5b9f1f7c SHA-256: 1ceb31cd5712f5def2e88ce589f2f75fa3490114569e9a299227b87e49b8219d
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan threat. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the document's primary purpose is to host numerous links on disposable domains, likely to redirect users to malicious content. While no scripts were explicitly extracted, the nature of PDF-based threats often involves embedded JavaScript for malicious actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9915

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 http://indianapit.thriftstorewebsites.net/flash/indianapit.thriftstorewebsites.net/file/kifaxigomij.pdf In PDF document text
    • https://machnik.net/ckfinder/userfiles/files/walixajuber.pdfIn PDF document text
    • https://bushregenerators.com/userfiles/files/simibalakake.pdfIn PDF document text
    • http://xn--80aer5aza.xn----htbdepbihnfb8cyg.xn--p1ai/ckfinder/userfiles/files/miduxifamotenazejed.pdfIn PDF document text
    • https://vaynhanh365.net/contents/files/ronufadukenulawidelave.pdfIn PDF document text
    • https://laser123.com/geektic/files/nesapemi.pdfIn PDF document text
    • http://fantalife.nl/userfiles/file/wugokaponagobuvabudazobaf.pdfIn PDF document text
    • https://confeccionesruiz.cl/UserFiles/File/tevumijigolijerodolof.pdfIn PDF document text
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/161409fc2678fa---51451626932.pdfIn PDF document text
    • https://aordonez.com/images/contenidos/files/87942069496.pdfIn PDF document text
    • http://otestmanager.org/club/data/userfiles/file/20210905033845.pdfIn PDF document text
    • https://cooperadora.grupocreartel.com/documentos/archivos/90120749684.pdfIn PDF document text
    • http://lightningriskassessment.com/ci/userfiles/files/dalevijomoxov.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1614fda4eeb5a0---98735341045.pdfIn PDF document text
    • http://imhome-listings.com/userfiles/files/38443635535.pdfIn PDF document text
    • http://xutricolor.com/uploadfile/files/pitamu.pdfIn PDF document text
    • http://abwclayton.com/uploads/files/sibutonomikipelakoxeso.pdfIn PDF document text
    • https://actorconseil.com/files/file/9232335714.pdfIn PDF document text
    • https://pspgenuine.com/ci/userfiles/files/9085935532.pdfIn PDF document text
    • https://rafaellopezehijo.com/upload/files/tanezisigumudo.pdfIn PDF document text
    • http://irvine.songhakbbq.com/uploads/files/juwibomagilefifozibuzebip.pdfIn PDF document text
    • http://driver-jazda.pl/upload/file/17372145172.pdfIn PDF document text
    • http://telegid.tv/userfiles/files/21467856357.pdfIn PDF document text
    • https://gulamanis.com/contents/files/94230616686.pdfIn PDF document text
    • http://envisystem.com/upload/userfile/files/xufepixegopewo.pdfIn PDF document text
    • http://phrabat.net/UserFiles/File/39234938215.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=x+factor+italia+appPDF 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_off0000b9a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB9A4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d1bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1BB 10076 bytes
SHA-256: 0f6cded6be1cefd00c255859f540fcc96fabd21462526c95b5e834c451cd032d
font_02_sfnt_off0000e83f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE83F 18104 bytes
SHA-256: ac5d087df43951a3f9bf517ab917a9fc06a6ca0005a51c09b04cde81ac2b0b02