Malicious PDF — malware analysis report

Static analysis result for SHA-256 f763a3ea509c9991…

MALICIOUS

PDF

70.9 KB Created: 2021-02-19 16:06:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 4a48b9347cd8b619b3a62a53483b43a6 SHA-1: 537233545fb9c2d8a7fb86cea038b51de3fd7b87 SHA-256: f763a3ea509c9991564340f99b3a737a8c68e09f30d5b96a16b7b2fdc59fbe52
126 Risk Score

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://leonvi.ru/wix?keyword=ac+market+apk+android+4.2.2 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4371003/normal_5fd9f31431fe2.pdfIn PDF document text
    • http://italiahot.space/ignou_ba_2nd_year_admission_formdgcg2.pdfIn PDF document text
    • http://hurleyshamburgers.com/ankhila_all_album_songf8he4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476564/normal_602e67262c25d.pdfIn PDF document text
    • https://cdn.sqhk.co/vejuwipem/PgfM5hN/gala_bingo_song_original.pdfIn PDF document text
    • http://vemasujananexu.22web.org/tifuzubi.pdfIn PDF document text
    • https://cdn.sqhk.co/kebokeregim/jeIhfjp/87698476048.pdfIn PDF document text
    • https://cdn.sqhk.co/kogoruzojif/s9ihjcL/crossing_over_occurs_during_prophase_ii.pdfIn PDF document text
    • http://kuxakutefop.22web.org/38175981437.pdfIn PDF document text
    • http://idealica-it.website/center_point_scope_3-9x32_manual2oion.pdfIn PDF document text
    • https://cdn.sqhk.co/xedufoga/jiichgt/zenupekebivosenex.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490001/normal_600bfd2e9eb40.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380869/normal_5fdf914854add.pdfIn PDF document text
    • http://just-gopro.com/61667059978a5oac.pdfIn PDF document text
    • http://3bki.ru/teoria_dos_conjuntos_numericosuimtb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://disupenepoka.epizy.com/bhangi_song_free.pdfIn PDF document text
    • http://resuzebapaluga.rf.gd/kivijorowegimetiboleji.pdfIn PDF document text
    • https://s3.amazonaws.com/xelimewat/mapufugajomomajatakerim.pdfIn PDF document text
    • https://s3.amazonaws.com/gowebabuxogiro/light_refraction_and_lenses_lens_practice_answers.pdfIn PDF document text
    • http://potovoz.rf.gd/98573821995.pdfIn PDF document text
    • http://fasevebozumip.rf.gd/60308862983.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_off0000d9fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9FB 5316 bytes
SHA-256: 986e4ce8de5cb130aa13b01227642321e66ec77325fe988b1e7662a4527f2606
font_01_sfnt_off0000ec0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC0C 10092 bytes
SHA-256: 5c59f43b1f2cd08249f772adb5cb7967e54ca082091b4db5bdd65588a1a4f1d1