Malicious PDF — malware analysis report

Static analysis result for SHA-256 704082cafd6a9112…

MALICIOUS

PDF

68.6 KB Created: 2021-04-01 04:56:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 7187773fdbdf9d554277e7a1880adefe SHA-1: 720f72bf27a81753e8a4a24e079648e816ed1451 SHA-256: 704082cafd6a9112c13d89201fb3381947a8559a5baf31f7f3401183d51ec43e
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://jottigo.ru/award?keyword=mastering+algorithms+with+c+pdf PDF link annotation
    • https://cdn.sqhk.co/fusexabuvej/dhfghgj/okay_okay_movie_songs.pdfIn PDF document text
    • http://maska-respirator.com/863304102962zfk5.pdfIn PDF document text
    • http://dfwshootersupply.com/rotator_cuff_tear_surgery_videohlnjq.pdfIn PDF document text
    • http://com-servers.online/funny_love_animation_quotesl2eak.pdfIn PDF document text
    • http://cethq.xyz/dr_seuss_coloring_pages_hat65yar.pdfIn PDF document text
    • https://cdn.sqhk.co/vorebilifi/ighhfau/66755399493.pdfIn PDF document text
    • http://xitemomide.22web.org/pafixomisaxut.pdfIn PDF document text
    • http://kaxowamuva.22web.org/moniezia_spp.pdfIn PDF document text
    • http://idealslimitaly-official.site/cant_get_my_kindle_to_turn_on3adp9.pdfIn PDF document text
    • https://cdn.sqhk.co/pajijolabalu/j3haKBO/bifari.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tesapibebujep/dotabuff_kunkka_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/82645bcb-b187-42ee-b6c7-2951883db961/97661590313.pdfIn PDF document text
    • http://luremanoxe.epizy.com/5621623929.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/430d6113-19bf-46a1-96a7-72f429f17bfc/91107309872.pdfIn PDF document text
    • http://togugufi.epizy.com/tiny_dancer_elton_john_piano.pdfIn PDF document text
    • https://s3.amazonaws.com/fumiposamisur/ascential_annual_report_2017.pdfIn PDF document text
    • http://lanuseponozowut.rf.gd/zezuvotefim.pdfIn PDF document text
    • http://tomunipi.rf.gd/bleacher_report_2020_mock_draft.pdfIn PDF document text
    • http://xagejedidupomup.rf.gd/50360377489.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_off0000ce8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE8D 5668 bytes
SHA-256: 754f1fa62824db0008122a2991c3c5d4b14abfef68df02f02c52a1155e25cb0d
font_01_sfnt_off0000e1ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1CA 10404 bytes
SHA-256: c5798404cd7efc05597c08759a530ca55027b83084b020eeb490c6f028843e7f