Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5ae317672dfdd18…

MALICIOUS

PDF

98.9 KB Created: 2021-03-15 00:40:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: a3a3932a758d83c31238aab63cb25bc4 SHA-1: 8220a42d938c555a472eab98a07477af7f91b9d9 SHA-256: e5ae317672dfdd18a9f1091f0f9fdde8667fb140f9353285dd2f5845e88c3d8f
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

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 0.9995

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://seumenha.ru/123?utm_term=citroen+c5+aircross+spec+sheet PDF link annotation
    • https://gamiwejejorar.weebly.com/uploads/1/3/4/4/134498461/7480217.pdfIn PDF document text
    • https://budekimezarusij.weebly.com/uploads/1/3/5/9/135964348/8649695.pdfIn PDF document text
    • https://cdn.sqhk.co/gubogezemazo/iighijd/dorotigawixeda.pdfIn PDF document text
    • http://ragitikevuwa.22web.org/24257207321.pdfIn PDF document text
    • https://pefisidedufe.weebly.com/uploads/1/3/4/9/134902532/kazasos_muguvovebiguda_bovor_patapulova.pdfIn PDF document text
    • https://cdn.sqhk.co/vobipibomuk/hiwcUXX/lurexakeworesalupebo.pdfIn PDF document text
    • http://xenifizonuk.22web.org/82368241192.pdfIn PDF document text
    • https://luwujapi.weebly.com/uploads/1/3/4/7/134751522/283cd63e6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • https://09d56968-2ae9-412d-ad86-e67dc63a1c23.filesusr.com/ugd/e8b91f_9e8129dde79d4e2598e35dc98789382b.pdf?index=trueIn PDF document text
    • http://xopemaw.rf.gd/40245512195.pdfIn PDF document text
    • https://167c8e7b-8160-49a2-a88e-f26749d647c8.filesusr.com/ugd/1ad47d_387d2852c2234d53bb8a3476970b0bb6.pdf?index=trueIn PDF document text
    • https://bad3f395-1638-4667-b349-d6f934eeab49.filesusr.com/ugd/ed2d23_7ae5deb5c16d4deea0c7f9df9e696b4f.pdf?index=trueIn PDF document text
    • https://0f4267a5-27df-427f-b7ff-de3c6d4a4cd0.filesusr.com/ugd/9e4921_f2e5aa8704474512b87fc9441448ac9b.pdf?index=trueIn PDF document text
    • http://pupenedu.rf.gd/75755383353.pdfIn PDF document text
    • https://a7563df4-ba19-4d82-a8a0-b2470d957038.filesusr.com/ugd/61f964_3296dbd64655493fa8d7317f078333ea.pdf?index=trueIn PDF document text
    • http://feduneve.rf.gd/thales_nshield_connect_6000_datasheet.pdfIn PDF document text
    • https://493f174a-a540-412c-bacb-e5b7b26cbfcf.filesusr.com/ugd/95bb70_7e32deafd1cc4efc9dfdf9dac2a93100.pdf?index=trueIn PDF document text
    • https://7c3a386c-9197-44ff-a2a0-26a6be1b6260.filesusr.com/ugd/bba797_44102159712946279fa675c3b64431da.pdf?index=trueIn PDF document text
    • https://d0a6b1b1-1773-4622-8b5e-0ab5990a7ed3.filesusr.com/ugd/b90ba1_97e89de3c7a5452b8a5025b48c231da2.pdf?index=trueIn PDF document text
    • https://a7474f5d-6ec7-41e4-954d-8cb0a6a0c5ec.filesusr.com/ugd/b987d2_131cb03cd1a14fe28e6d022848e7f332.pdf?index=trueIn 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
    • http://scripts.sil.org/OFLIn PDF document text
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00015522.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x15522 22276 bytes
SHA-256: e2f6630721c72885d60ca7b573f6fd094e362ad46bd87c5c81ad5d8eb4a54709
font_00_sfnt_off000107c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107C9 5020 bytes
SHA-256: 873c5eabe37b3e47be378e4876ce039b5df8872ddf154328aebd64843f75f955
font_01_sfnt_off000118ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118CA 6920 bytes
SHA-256: 930a7d66c42c17c02cea46b4811398151201f48cec48b58817071c00958e28f5
font_02_sfnt_off00012b43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B43 12596 bytes
SHA-256: fe7bfa23e3ab953e82e79203d004c8775cbf7107250a1973880b6307d8a25ac9

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