Malicious PDF — malware analysis report

Static analysis result for SHA-256 00c2635eae2928b5…

MALICIOUS

PDF

81.6 KB Created: 2021-09-08 23:58:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-02
MD5: af0caac995b6284b9fef0f2c9e0b0c60 SHA-1: ac6f6780a1de6d704ead7e9f375f074535cfd2b8 SHA-256: 00c2635eae2928b5988ecf63f794154ff349dc404ff66b7fed5b15bd02d59a32
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 0.9977

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://pixomot.ru/uplcv?utm_term=miui+12+update+redmi+note+9+pro PDF link annotation
    • http://wernitznigg.at/files/wupefomok.pdfIn PDF document text
    • http://www.cottagegrad.ru/files/file/77011383772.pdfIn PDF document text
    • https://copperscrap.wasteequipment.net/ckfinder/userfiles/files/nolimodufuxukajabifax.pdfIn PDF document text
    • http://kanoonkaraj.ir/dbmanager/filebank/htmlgallery/file///nogosoloxoda.pdfIn PDF document text
    • https://ozanetiket.com/TasarimAcarnet/serhali/upload/files/92980219633.pdfIn PDF document text
    • http://inlovehuahin.com/file_media/file_image/file/sowesolazezuwokasoxe.pdfIn PDF document text
    • http://baheth24aqari.com/ckfinder/userfiles/files/mazaxumolagusikol.pdfIn PDF document text
    • http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/161349765f2b00---58812700262.pdfIn PDF document text
    • http://patronusalapitvany.hu/public_html/upload/baxovimederir.pdfIn PDF document text
    • https://dunaweb.co/bg_image/files/7009199287.pdfIn PDF document text
    • http://tartak-monis.pl/tartak/images/file/96001453440.pdfIn PDF document text
    • http://brixtontaxi.com/survey/userfiles/files/21831588508.pdfIn PDF document text
    • http://esipro.be/userfiles/file/2999290316.pdfIn PDF document text
    • http://philipsphotographystudio.com/81360681745.pdfIn PDF document text
    • http://savitaco.com/uploads/images/files/41090461176.pdfIn PDF document text
    • http://inbiosa.eu/static/cfiles/files/manafokubupuwuwisepida.pdfIn PDF document text
    • https://drbumbnursinghome.in/ckfinder/userfiles/files/845108378.pdfIn PDF document text
    • http://ambvetfanini.eu/userfiles/files/89303599352.pdfIn PDF document text
    • https://mr-alian.com/upload/ckfinder/files/95207884629.pdfIn PDF document text
    • https://eagleegg5k.com/ckfinder/triplebuserfiles/file/mefedozedinuniwole.pdfIn PDF document text
    • https://sirikulsteel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613737aa5250d---71987992807.pdfIn PDF document text
    • https://butzbacher.turnpoint.jo/app/webroot/upload/files/musewuvazeked.pdfIn PDF document text
    • http://modamoda.nl/uploads/pic_lib/file/59955452804.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_off0000d4ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4AE 20044 bytes
SHA-256: 58ba297085517a66d7b773f97497701e5a6e64e985556836143fc24288d7facd
font_01_sfnt_off00010800.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10800 10772 bytes
SHA-256: b6a67d12b67f2bee5bd115583b39c038d0fc0f16cf28f49b977205dc0c705ac3
font_02_sfnt_off000120d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120D9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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