Malicious PDF — malware analysis report

Static analysis result for SHA-256 14ddca4fea3e0f0b…

MALICIOUS

PDF

75.4 KB Created: 2021-03-20 17:24:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 56fd129096321dd43810d08e3f2b5818 SHA-1: 58aa4202f06e7844fb77deaafd96ea6a5eac0fa8 SHA-256: 14ddca4fea3e0f0bb3a166db2e3a9d166ca73ed30bde6de2e52805a0750a3920
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 0.9997

Heuristics 6

  • 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 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://soxebez.ru/award?keyword=telugu+catholic+bible+pdf+free+download PDF link annotation
    • https://cdn.sqhk.co/bejomewuv/emge0Tj/build_a_bear_baby_yoda_review.pdfIn PDF document text
    • http://fresh-ita.space/long_form_marriage_certificate_nova_scotiay2qwg.pdfIn PDF document text
    • https://kegozorud.weebly.com/uploads/1/3/0/7/130740561/4bb25b5cb182.pdfIn PDF document text
    • http://lnstagram-blue-ticks.com/what_is_form_ssa-1099-sm_1-202177yim.pdfIn PDF document text
    • https://cdn.sqhk.co/duzoxibuf/yijQMih/37758993258.pdfIn PDF document text
    • https://cdn.sqhk.co/jemowevu/xji9Mo3/3707524657.pdfIn PDF document text
    • https://metasabuvaro.weebly.com/uploads/1/3/2/6/132681671/lofilovune.pdfIn PDF document text
    • https://cdn.sqhk.co/gagowuname/geZjfif/nesukiniwerojojopirom.pdfIn PDF document text
    • https://zesasanigemi.weebly.com/uploads/1/3/4/6/134646319/wabonivaputabubiromi.pdfIn PDF document text
    • https://pejoguroboxifuj.weebly.com/uploads/1/3/1/6/131637830/b994affd9244.pdfIn PDF document text
    • https://cdn.sqhk.co/molipigi/ifhepaY/belomukinikit.pdfIn PDF document text
    • https://cdn.sqhk.co/lilomovetum/ajbharU/zoom_cloud_meetings_app_download_for_pc_free.pdfIn PDF document text
    • https://tugixafebav.weebly.com/uploads/1/3/2/6/132681891/nuruzidero.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tamefizorala.epizy.com/zutakimixarizebelopodal.pdfIn PDF document text
    • https://s3.amazonaws.com/damerirazib/14167756929.pdfIn PDF document text
    • https://s3.amazonaws.com/gazivemon/89319608880.pdfIn PDF document text
    • http://sasaroguri.rf.gd/29574815752.pdfIn PDF document text
    • http://besevinoferoza.epizy.com/13906512535.pdfIn PDF document text
    • https://s3.amazonaws.com/xapidajovaji/muwatoboxu.pdfIn PDF document text
    • https://s3.amazonaws.com/bofake/bedtime_lullabies_for_babies_free.pdfIn PDF document text
    • https://s3.amazonaws.com/tibanepoxilibud/aadhaar_card_without_otp.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_off0000e88a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE88A 5420 bytes
SHA-256: c5fc7f2b285c45456be199edbc65a59c61e9ac3bf34765b79733f2110ac658ea
font_01_sfnt_off0000fb06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB06 10900 bytes
SHA-256: 90c6ffae9209cce975f5f2e84bf5395c77e74bc7bf041a88675db8c8bcf2b943

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