Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4a055fd0e0713db…

MALICIOUS

PDF

73.1 KB Created: 2021-03-07 15:04:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: b3994d23808e22ae7384ea84549747b9 SHA-1: af2e8de30ef073d543db7d3a8faefad717cc1f97 SHA-256: f4a055fd0e0713db03ef023407e1b4120c836475f1aa9e6a0775600cefe2d547
126 Risk Score

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://zajinet.ru/award?keyword=are+waste+oil+heaters+safe PDF link annotation
    • http://ninuxalezopo.getenjoyment.net/how_to_find_the_half_life_of_a_first_order_reaction.pdfIn PDF document text
    • http://nemosixumeki.mypressonline.com/sekaxipokonadorenu.pdfIn PDF document text
    • http://kosamaritaj.getenjoyment.net/47795886083.pdfIn PDF document text
    • http://zazorin.scienceontheweb.net/how_to_draft_and_interpret_insurance_policies.pdfIn PDF document text
    • https://xekukagakodepa.weebly.com/uploads/1/3/3/9/133999272/c94ea98337e.pdfIn PDF document text
    • http://vowujebotoza.mywebcommunity.org/how_long_to_charge_mophie_juice_pack_air.pdfIn PDF document text
    • https://tasoxagizuj.weebly.com/uploads/1/3/4/7/134734804/7166753.pdfIn PDF document text
    • https://xufidevudog.weebly.com/uploads/1/3/4/3/134389214/jivubikajit.pdfIn PDF document text
    • http://gidilakapajuke.mywebcommunity.org/practice_10-3_areas_of_regular_polygons.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/xewamejixolefaj/composite_shapes_area_worksheets.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6d60eb4-1035-49fe-9df7-159ed42c0c6c/family_feud_canada_contestants.pdfIn PDF document text
    • http://pozidijapepore.atwebpages.com/87575134771.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/305eeb60-10d2-4a82-884b-f267bebb8ae5/reflexive_verb_exercises_spanish.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/92754338-835c-4081-873b-32ba389b9f14/mizesuwutinim.pdfIn PDF document text
    • https://s3.amazonaws.com/tisegovofu/free_printable_worksheets_capitalization_and_punctuation.pdfIn PDF document text
    • http://dezobod.onlinewebshop.net/zesaximefifuzoze.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d7e4967-01dc-489a-8121-09f372497b61/which_is_better_braun_series_5_or_7.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_off0000e3e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3E4 4936 bytes
SHA-256: dbb739cfaa42f957abcb069e3653de810269bb93d478b537831d10de4ede848d
font_01_sfnt_off0000f4b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4B6 10184 bytes
SHA-256: 6e8e9c7106cfbdf98ff2b0773be555b2f50a9a4aa69143123c0970c22017c087