Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a94c86b8566c20e…

MALICIOUS

PDF

73.1 KB Created: 2021-06-09 03:18:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 7899e28dcc47bf6a11121c21d071c21d SHA-1: 4cd5772b269d5021f1b8ae0b3fc772bf4728f1fd SHA-256: 8a94c86b8566c20e823e359a51d1f65ed2810c45c1561278c30ad99d5ed00d34
186 Risk Score

Malware Insights

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

The sample is a PDF document that contains numerous embedded URLs, with one prominent URL pointing to a suspicious domain. The heuristic 'SE_SECRET_RECOVERY_LURE' indicates the document's content is designed to trick users into revealing sensitive information like private keys or recovery phrases. Although no scripts were explicitly extracted, the presence of external URIs and the nature of the lure suggest a phishing attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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://coretry.ru/pbw?utm_term=fourth+of+july+frederick+douglass PDF link annotation
    • https://lavupujewefi.weebly.com/uploads/1/3/4/6/134631736/1603306.pdfIn PDF document text
    • https://wajifisawebe.weebly.com/uploads/1/3/4/4/134480175/6292414.pdfIn PDF document text
    • https://zisirusezudi.weebly.com/uploads/1/3/4/8/134846547/687dbd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rumusapage.pbworks.com/f/dibadagavutox.pdfIn PDF document text
    • http://duziruromeja.pbworks.com/w/file/fetch/144498954/is_doom_slayers_collection_worth_it.pdfIn PDF document text
    • http://siseraxoru.pbworks.com/w/file/fetch/144910458/bobuvemuwowomuzunuxaz.pdfIn PDF document text
    • http://wigonewakil.pbworks.com/w/file/fetch/144826398/40313957450.pdfIn PDF document text
    • http://nidibewuzi.pbworks.com/w/file/fetch/144660468/plants_vs_zombies_garden_warfare_pc_download_highly_compressed.pdfIn PDF document text
    • http://lebunurivugu.pbworks.com/f/12849050359.pdfIn PDF document text
    • http://fijovolumi.pbworks.com/w/file/fetch/144834837/28303637517.pdfIn PDF document text
    • http://bajaduxaxusi.pbworks.com/w/file/fetch/144802707/celebrate_recovery_codependency.pdfIn PDF document text
    • http://bovojigu.pbworks.com/w/file/fetch/144418572/hollywood_hindi_dubbed_movies_watch_online_sites.pdfIn PDF document text
    • http://xuruzinijub.pbworks.com/f/55962770416.pdfIn PDF document text
    • http://wekibivu.pbworks.com/f/ac_market_mod_apk_2020_download.pdfIn PDF document text
    • http://pitavumiza.pbworks.com/w/file/fetch/144901599/how_to_find_isotopes_protons_electrons_and_neutrons.pdfIn PDF document text
    • http://funinupun.pbworks.com/f/extreme_landings_pro_pc_free_download.pdfIn PDF document text
    • http://barumena.pbworks.com/w/file/fetch/144778734/learn_to_play_the_clarinet_notes.pdfIn PDF document text
    • http://guronavageba.pbworks.com/f/tutexaninomek.pdfIn PDF document text
    • http://jesababa.pbworks.com/f/nedaborijamatolerugoded.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_off0000e19c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE19C 5480 bytes
SHA-256: d262a68dc29fd6e5c89d9471255acf3eaac6dd2186a0b3ccfef7cbb6297346cb
font_01_sfnt_off0000f450.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF450 10496 bytes
SHA-256: cf7c4f7bc2b552db5078581b354e3a6904dddea224e5a16a8a55d6e82f8b5f87

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