Malicious PDF — malware analysis report

Static analysis result for SHA-256 3730b3da39353f14…

MALICIOUS

PDF

74.0 KB Created: 2021-03-26 13:44:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: b972f95b8185d896633547adfde7bf50 SHA-1: be178d51747e5fe31cdd3c200a2bbf0e3165b553 SHA-256: 3730b3da39353f14345e6f9d1ef489c4f5708584515d06b776a8dae51f52df5e
126 Risk Score

Malware Insights

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

The sample is a PDF document flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains an external URI pointing to 'maypoin.ru', which is likely a phishing or malware distribution site. The document body, though heavily obfuscated, appears to be a lure related to downloading Beatles scores, a common tactic for phishing or malware delivery. No scripts were extracted, but the PDF structure and embedded URLs suggest an attempt to redirect the user to a malicious host.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://maypoin.ru/award?keyword=the+beatles+complete+scores+pdf+download PDF link annotation
    • http://dutov.org/how_to_change_resmed_mini_filterqcaz7.pdfIn PDF document text
    • https://cdn.sqhk.co/veleviziwew/chdbCif/xisigawurukuworategitipe.pdfIn PDF document text
    • http://sparzha.club/43007986359sz6tc.pdfIn PDF document text
    • https://cdn.sqhk.co/zoluxoni/hbHjiha/ev_plug_type_2.pdfIn PDF document text
    • http://idealica-italiaoficial.site/76945426429eshhv.pdfIn PDF document text
    • http://pugorot.mygamesonline.org/black_casio_g-shock_5600_solar_atomic_watch_gwm5610-1.pdfIn PDF document text
    • http://nizagose.66ghz.com/a_form_of_horizontal_analysis.pdfIn PDF document text
    • https://cdn.sqhk.co/vavefamixivi/H2y4hhw/the_blade_2.pdfIn PDF document text
    • http://lienforkid.com/a_series_of_unfortunate_events_film_netflixpr7oy.pdfIn PDF document text
    • http://rotirir.mypressonline.com/broteinheiten_tabelle.pdfIn PDF document text
    • http://filemarker.store/narrative_essay_sample2hu7n.pdfIn PDF document text
    • http://trylait.pro/credit_report_security_freeze_equifaxqqw2r.pdfIn PDF document text
    • http://habercigo.com/2015_jeep_grand_cherokee_pcm_problemszzkzs.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/12d549fe-7df8-469f-acb2-19a98f38b2e3/35040002202.pdfIn PDF document text
    • http://zunaxixe.rf.gd/berimupigeborakudup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9831c779-e071-4aa1-8817-d84ea694c876/the_new_national_baptist_hymnal_21st_century_edition.pdfIn PDF document text
    • http://gifidabula.atwebpages.com/nupamaxuguteva.pdfIn PDF document text
    • http://tunawibiga.rf.gd/xovisodezuwelufebixafuve.pdfIn PDF document text
    • http://xedotowatanulew.rf.gd/96268673173.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22c6f48e-0467-4d00-b81d-4fb4ac996a04/76525955198.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d99d92d9-ce0a-4386-b09e-7566d9624cc6/graco_duet_glide_gliding_swing_with_portable_rocker_reviews.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_off0000e3b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3B2 5576 bytes
SHA-256: ecabf24913483e9d212834b65b92ee5c5933403c5e9ea20709066a0b38eebb5e
font_01_sfnt_off0000f684.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF684 10484 bytes
SHA-256: 22792098734a97ed2c320cdf01da99220e0afce85799835c188d940ed9d108a4

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