Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f998cfeedcb18ed…

MALICIOUS

PDF

76.7 KB Created: 2021-09-12 08:22:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: 69e8a1c53a264796ed672fc9373e4db5 SHA-1: 56521da4ecc8accc1ce073426dcf8ea59049981c SHA-256: 6f998cfeedcb18ed547727bc6a33ab9367d67eaba2bbc73eb087cb4e7068a410
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://crysiq.ru/uplcv?utm_term=watch+galactik+football+online+free PDF link annotation
    • http://salonorganica.ru/upload/files/2370769595.pdfIn PDF document text
    • http://affordableadobe.com/ckfinder/userfiles/files/vegadujamavimikikaweva.pdfIn PDF document text
    • http://supermarketdv.ru/files/file/sitilitatazobotel.pdfIn PDF document text
    • http://aodaiminhhanh.com/app/webroot/uploads/files/62580592871.pdfIn PDF document text
    • https://hotelpancharatna.com/assets/userfiles/files/rosapavujiku.pdfIn PDF document text
    • http://impex-italia.it/userfiles/files/34321937765.pdfIn PDF document text
    • https://eurosan.pl/user_images/file/bixos.pdfIn PDF document text
    • http://squarcialupirelaxinchianti.com/writable/public/userfiles/file/79378798129.pdfIn PDF document text
    • https://autoradiator.mn/uploads/ckfinder/files/84983535170.pdfIn PDF document text
    • http://evola.it/userfiles/files/93809472152.pdfIn PDF document text
    • http://xn--42-jlclgg6a3e.xn--p1ai/userfiles/file/kefajisap.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132b65e785dd---logorilopigife.pdfIn PDF document text
    • http://nhadatv.com/webroot/img/files/70278319836.pdfIn PDF document text
    • https://baohohoanglong.com/userfiles/file/27518435425.pdfIn PDF document text
    • https://www.bbmnetlicitacoes.com.br/cms/ckfinder/upload/files/saxomanuxosivuvogekusi.pdfIn PDF document text
    • http://rheinmotel.com/userfiles/file/padogawenuki.pdfIn PDF document text
    • https://bhiringisamsankalimandir.org/ckfinder/userfiles/files/lafuvunenapexisog.pdfIn PDF document text
    • https://ekransamara.ru/files/mililibaxus.pdfIn PDF document text
    • https://justforjetscatering.com/userfiles/image/files/golutuvinuvu.pdfIn PDF document text
    • https://demo-calson.garment-pro.com/ckfinder/userfiles/files/tajodonogisutonovato.pdfIn PDF document text
    • https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d60a8d3fa1---87014520757.pdfIn PDF document text
    • http://nedirajtebosnu.net/userfiles/file/82545006740.pdfIn PDF document text
    • http://www.kowel.com/ckfinder/userfiles/files/1630940965.pdfIn PDF document text
    • http://shipsupply.ru/userfiles/files/wopabebusefatuvizimora.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_off0000c8ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8AC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e0be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0BE 16848 bytes
SHA-256: d7a3e8e45842fc282e32195ea188a54b3a78f7bcd63a4dffba12394682a93621
font_02_sfnt_off00010c6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C6F 10672 bytes
SHA-256: 7da039cf0355e860a7d4845341f0003050d4235e52dfe7beda6f442958bb5112