Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbadfc54ca367352…

MALICIOUS

PDF

69.2 KB Created: 2021-03-10 23:42:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 940a89e0efddf7c7089d048499db9527 SHA-1: b7d16448c1b460207085b5f6e059e9891f6726bf SHA-256: fbadfc54ca367352e78fdd6700b93ea721dd3a5336ff901237630db1fe71b987
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains embedded links, one of which points to a known malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, contains keywords related to games and agreements, suggesting a lure to a malicious site for phishing or malware delivery.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/wix?keyword=roblox+hotel+bloxburg In PDF document text
    • https://cdn.sqhk.co/pibutuvopedu/6BOoDjf/foosball_table_free_online_game.pdfIn PDF document text
    • https://cdn.sqhk.co/nakusunegud/jaBjiTw/54072933452.pdfIn PDF document text
    • https://cdn.sqhk.co/vasozaponem/LNb7hjO/my_android_phone.pdfIn PDF document text
    • https://cdn.sqhk.co/rovifatira/e3lLjcf/40477474415.pdfIn PDF document text
    • https://cdn.sqhk.co/ponajadu/yzijEie/on_the_rails_farm.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369908/normal_5fd23edc842c3.pdfIn PDF document text
    • https://cdn.sqhk.co/xedufoga/eijZhd9/dalagejejosemiwup.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487197/normal_5fda8ff89bf61.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455642/normal_60312de997abc.pdfIn PDF document text
    • http://tonemisi.medianewsonline.com/1-5_solving_inequalities_worksheet_answers_algebra_2_form_g.pdfIn PDF document text
    • http://tigafik.mygamesonline.org/wekur.pdfIn PDF document text
    • https://cdn.sqhk.co/ribafesupuro/7hgicha/10235876695.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366008/normal_5feda0d6bc214.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/sazomo/shareholder_loan_agreement_template_hong_kong.pdfIn PDF document text
    • https://s3.amazonaws.com/wexukufedepim/comcast_tv_guide_delray_beach.pdfIn PDF document text
    • https://s3.amazonaws.com/xixonu/avery_5162_template_word_2003.pdfIn PDF document text
    • http://kavezusi.onlinewebshop.net/le_trait_de_westphalie.pdfIn PDF document text
    • https://s3.amazonaws.com/bibejovixapis/how_to_write_a_personal_essay_for_college_admission.pdfIn PDF document text
    • https://s3.amazonaws.com/babetafaperaxov/wilsonart_plastic_laminate_sheet_sizes.pdfIn PDF document text
    • http://rogofideb.onlinewebshop.net/74922414719.pdfIn PDF document text
    • https://s3.amazonaws.com/kaxukok/2008_gmc_acadia_parts_manual.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_off0000d64f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD64F 4776 bytes
SHA-256: e5756d83b4c701e736df288b2d637f1891a291ca72b03c879bf3270d5cdcb86b
font_01_sfnt_off0000e693.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE693 9668 bytes
SHA-256: b7cb15bb4b7ea1f387ffef16b237a29c6be4ecdda6f3233ba6f917918d486d0b

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