Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ef2a28bfa43adb5…

MALICIOUS

PDF

76.9 KB Created: 2021-03-27 22:45:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 059cfcd30377d74f2e281da65792c2fe SHA-1: 519bdaea8d7b156500367430c268013cd4daba6a SHA-256: 3ef2a28bfa43adb522cc8b063ea0c3f9cbeec1637401da6b9dd0a605d7ce5a7b
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 0.9995

Heuristics 5

  • 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 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://mezovuduw.ru/123?utm_term=aggiornamento+android+pie+huawei PDF link annotation
    • https://cdn.sqhk.co/nobipajami/gjgRNCU/oscar_de_la_hoya_retirement_age.pdfIn PDF document text
    • https://cdn.sqhk.co/gadewekunel/gia2hif/rapunzel_doll_and_dress_set_b_m.pdfIn PDF document text
    • https://cdn.sqhk.co/fodibaniwe/haOp9g9/candylink_vpn_free_no_ads.pdfIn PDF document text
    • https://cdn.sqhk.co/zowonefaso/ide7bw1/europe_golden_boot_race_2018_19.pdfIn PDF document text
    • http://waralolojogeta.sportsontheweb.net/alternative_dispute_resolution_project.pdfIn PDF document text
    • https://cdn.sqhk.co/mujowofapubi/gZ8ha22/sonic_dash_2_mod_apk_unlimited_everything.pdfIn PDF document text
    • https://cdn.sqhk.co/mipijotom/yheGrxq/73195814379.pdfIn PDF document text
    • http://tujidal.mypressonline.com/57671406689.pdfIn PDF document text
    • https://cdn.sqhk.co/faserekino/hj9bAQJ/bingo_live_online_chat.pdfIn PDF document text
    • https://cdn.sqhk.co/gafisasiwu/PhaAjbx/tivodesufefalilusuzejen.pdfIn PDF document text
    • http://gidonuvawugirid.medianewsonline.com/varices_esofagicas_fisiopatologia.pdfIn PDF document text
    • http://nevinidonet.mywebcommunity.org/abrsm_grade_8_scales_piano.pdfIn PDF document text
    • https://cdn.sqhk.co/wefegiwezon/gwiahbv/pegoxudezigekolemavutogo.pdfIn PDF document text
    • https://cdn.sqhk.co/wojipezusax/iagexif/selituxuta.pdfIn PDF document text
    • https://cdn.sqhk.co/zojixemem/gf5je82/psplay_unlimited_ps4_remote_play_review.pdfIn PDF document text
    • http://fovikoxesaweziz.medianewsonline.com/72549620073.pdfIn PDF document text
    • http://nusoxex.iblogger.org/nizegilupuvikebuji.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://bimitev.epizy.com/fawowirinupewodugeli.pdfIn PDF document text
    • http://lozufusudurosok.epizy.com/lectio_divina_guide_catholic.pdfIn PDF document text
    • http://delenujafoxa.rf.gd/baseball_card_sheets_walmart.pdfIn PDF document text
    • http://riromazadejiwa.rf.gd/98506258165.pdfIn PDF document text
    • http://xulufavuso.rf.gd/moonlight_sonata_beethoven_sheet_music.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e0da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0DA 5124 bytes
SHA-256: a3c6c03f2398a56ed8953eaf03ea64fa9e60a49f3addf73d5decee6af06e9da5
font_01_sfnt_off0000f222.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF222 11588 bytes
SHA-256: 9a3206f26cfc8518de87a77f16b02c9a2b10dd68c1f12141a2fab72a74fd4311
font_02_sfnt_off0001182d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1182D 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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