Malicious PDF — malware analysis report

Static analysis result for SHA-256 e097ef42883e1a3d…

MALICIOUS

PDF

192.1 KB Created: 2021-04-07 21:31:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: fc4f6db293cf429cefbad06f3da000c9 SHA-1: 9d71543ed323ee0ef03d5e71c202f8d820912cca SHA-256: e097ef42883e1a3d6fe1bdd317e085f8e26d7ee72a4e8f13f5f3457512efb9b5
134 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The presence of external URIs and a link farm on disposable hosting suggests a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains elements that, combined with the heuristics, point towards a lure designed to trick users into visiting a malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://jottigo.ru/123?utm_term=attention+bass+tab+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366984/normal_6059bd84d3abc.pdfIn PDF document text
    • http://lelekelosutov.getenjoyment.net/que_es_la_conducta_psicologia.pdfIn PDF document text
    • http://lexaxak.mywebcommunity.org/rozogesariluri.pdfIn PDF document text
    • http://nuxuzuruguli.mypressonline.com/karcher_honda_gcv160_pressure_washer_parts.pdfIn PDF document text
    • http://tikixoji.mywebcommunity.org/basic_english_grammar_book_2_answer_key.pdfIn PDF document text
    • https://debuvubuni.weebly.com/uploads/1/3/4/8/134846467/mamosikitudug.pdfIn PDF document text
    • http://bagutoruramig.mywebcommunity.org/can_you_convert_to_word_on_ipad.pdfIn PDF document text
    • https://fubaxegadajud.weebly.com/uploads/1/3/4/4/134454669/zemopas_sunadonelo.pdfIn PDF document text
    • http://fejekadiwoxobiz.getenjoyment.net/moon_river_chords_eric_clapton.pdfIn PDF document text
    • http://duwinijuj.mypressonline.com/persuasive_writing_samples_grade_5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412762/normal_5ff60544d316e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422382/normal_5fcd2754b58eb.pdfIn PDF document text
    • https://dexulivixuwe.weebly.com/uploads/1/3/0/7/130739852/gesunu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/23f33035-7691-40b4-af79-8486aa7426c3/gokovibuzesave.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a49cb43-d52b-45e0-9a7d-7630079020f8/nazm_hikmetin_iir_yazd_kadn.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48d2bf6f-5e6a-4585-b65f-c9d69427944a/nezalepitur.pdfIn PDF document text
    • https://s3.amazonaws.com/kefefetafij/37615746512.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6969e3f-c7bf-4a72-a508-a561513c5068/bell_jar_quotes_and_analysis.pdfIn PDF document text
    • https://s3.amazonaws.com/legapatatezisa/ronawekubakumot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6b58646-fca9-452f-8d1d-dd914d506dc3/kegofurirudix.pdfIn PDF document text
    • https://s3.amazonaws.com/samopakamefap/chhota_bheem_images_free.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_off0002bb42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2BB42 5036 bytes
SHA-256: 7a84ffc5a7691c9a3eb3fc2df0b78275f157ed4b9f3b3957d7f09a30f4936bcc
font_01_sfnt_off0002cc74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2CC74 11500 bytes
SHA-256: b7434867008e27dc8e10bd122d8e96b15398f14a7c2d2da82a1d8013c70a0205

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