Malicious PDF — malware analysis report

Static analysis result for SHA-256 e77b58de7e6b63c2…

MALICIOUS

PDF

78.7 KB Created: 2021-04-01 17:32:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: fd4d30af921414dbee87ee2fc8adaccc SHA-1: 50528f2983cb6940c5839d47ed83348a4b4f8a5c SHA-256: e77b58de7e6b63c246d14f1032b94e57ced2642e262ebe89623c96bcebd75596
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9961

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://druttle.ru/strik?utm_term=arduino+full+kit+price+in+pakistan PDF link annotation
    • http://nebuxopav.mypressonline.com/what_is_the_effects_of_chemotherapy.pdfIn PDF document text
    • https://cdn.sqhk.co/lilavokolet/H5hdia0/random_deck_for_clash_royale.pdfIn PDF document text
    • https://cdn.sqhk.co/daviwiloma/hhrRBii/jesimixeta.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496812/normal_5fd3dce9dad66.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467564/normal_6015803961bda.pdfIn PDF document text
    • http://vatologox.iblogger.org/xopepevisipafupirigoge.pdfIn PDF document text
    • http://wifisef.medianewsonline.com/chaupai_sahib_path_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/naxetimi/jfOggob/outlook_android_anmeldung_nicht_mglich.pdfIn PDF document text
    • http://wotukujis.sportsontheweb.net/66867166239.pdfIn PDF document text
    • http://nomudepalak.medianewsonline.com/feelings_and_emotions_worksheets_for_kindergarten.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367947/normal_6054032944c12.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502236/normal_60443e88a638d.pdfIn PDF document text
    • https://cdn.sqhk.co/vumulevezuf/djdy70X/talking_tom_gold_run_fun_game_online.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457586/normal_605a02c0a53e9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://batapijas.myartsonline.com/basic_linux_commands_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/pizexopenaxu/budefaxebutidedugovawulo.pdfIn PDF document text
    • https://s3.amazonaws.com/punagilelabon/ferukaba.pdfIn PDF document text
    • http://jufonab.epizy.com/biwako_millennium_framework_for_action_2020.pdfIn PDF document text
    • http://felepav.epizy.com/react_native_cheat_sheet.pdfIn PDF document text
    • http://wigazimo.epizy.com/45962399853.pdfIn PDF document text
    • https://s3.amazonaws.com/pewebopufupe/cic._gc._ca_citizenship_study_guide.pdfIn PDF document text
    • http://rezafenunuritem.epizy.com/narasimham_malayalam_movie_songs_kuttyweb.pdfIn PDF document text
    • http://zosofoladi.rf.gd/thk_linear_guide_installation.pdfIn PDF document text
    • http://rowomasogig.epizy.com/aradhana_telugu_movie_ringtone.pdfIn PDF document text
    • https://s3.amazonaws.com/bojafazes/8173292426.pdfIn PDF document text
    • http://divifafapinuk.rf.gd/physics_solution_class_12_chapter_2.pdfIn PDF document text
    • https://s3.amazonaws.com/nonabafat/xomorebi.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_off0000f3a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3A9 5200 bytes
SHA-256: 76d75ef2d8923f8e061462fabbf5738c6cfabc79f5199735fb11264c1c515ee9
font_01_sfnt_off0001056d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1056D 11228 bytes
SHA-256: 84a806c671513a41b9109615db31a52357a1ebaa605094a9313ef9b828d1c3cc

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