Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2a32063814e2c3b…

MALICIOUS

PDF

84.0 KB Created: 2021-04-08 09:42:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: fa58682f13dce421cc2d2fdbe413afdf SHA-1: cccfb2908f9885dda3ff658df1c9dd5e0605f21a SHA-256: f2a32063814e2c3b93140ab2000265e5f9a749029ed62c77f89cad0099dbf652
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 0.9998

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://soxebez.ru/wix?keyword=dns+and+dhcp+interview+questions+and+answers+pdf PDF link annotation
    • https://cdn.sqhk.co/givesaxi/iDiiaij/john_gba_lite_cheats_app.pdfIn PDF document text
    • http://cetakchantek.com/13097490318uaptt.pdfIn PDF document text
    • http://wagotuwowasen.22web.org/kawexabep.pdfIn PDF document text
    • https://zerimesatevig.weebly.com/uploads/1/3/4/8/134879836/f96bd0a0b.pdfIn PDF document text
    • https://cdn.sqhk.co/xufatirumina/hdieZjf/73687853847.pdfIn PDF document text
    • http://smartline58.ru/what_stage_of_eriksons_developmentalhqzhm.pdfIn PDF document text
    • http://shopbest.online/32853542347iswv3.pdfIn PDF document text
    • http://bloomwithdeanna.com/70207765481fnfkw.pdfIn PDF document text
    • http://shtancircul.site/luvebijevuxuzodurerilownpr2f.pdfIn PDF document text
    • https://cdn.sqhk.co/nosimasiv/UijC2zM/galaxy_shooter_2020.pdfIn PDF document text
    • https://vifabuwu.weebly.com/uploads/1/3/1/6/131606679/katus.pdfIn PDF document text
    • http://rawotanu.iblogger.org/novapugavufopepixozite.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://f1c0478e-57b3-422a-b8eb-433964b677d2.filesusr.com/ugd/16c17d_7ae8cce3649647718b7795560ddb4ec0.pdf?index=trueIn PDF document text
    • https://26c1613e-5d28-4fa3-89cb-3d2c9ab59faf.filesusr.com/ugd/fe83c3_caa910ad389f4d51ab8e00755add705a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vuforewebub/42493007278.pdfIn PDF document text
    • https://s3.amazonaws.com/votuweroxigezog/72422961835.pdfIn PDF document text
    • https://178c1879-e916-404b-9861-a2431bd0f83a.filesusr.com/ugd/1aace6_cdf9f4cf4d2347fb88118e78b726090b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gonafoziguwewe/tipujurizipujel.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010cbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CBD 5488 bytes
SHA-256: 08d864a287d8eefd27f44287527d220b9db4a320de16f584b31129721dc868b3
font_01_sfnt_off00011f7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F7C 10780 bytes
SHA-256: c4a06d00d9d49437281cb5e284cf45294afe20f334d0c17e4c9b9d52ba0b0042

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