Malicious PDF — malware analysis report

Static analysis result for SHA-256 93ff615b3c119682…

MALICIOUS

PDF

77.1 KB Created: 2021-03-20 03:27:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 4d7e408899cf23e16c21a404eee7b05f SHA-1: 9575e0f8a3b6c127d91ac4208f429c59f1d57001 SHA-256: 93ff615b3c119682a590240ac1cfc71caba601d8bcf0085b2a4bf60cf33193c7
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 0.9997

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
  • 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://vilenefex.ru/award?keyword=colace+davis+pdf PDF link annotation
    • https://cdn.sqhk.co/wopeporamo/gvihN2C/14248115736.pdfIn PDF document text
    • http://rijebipimaba.getenjoyment.net/gobexotolejigef.pdfIn PDF document text
    • http://bapulesaj.mygamesonline.org/mama_ntilie.pdfIn PDF document text
    • https://cdn.sqhk.co/veletafi/ZY7ilhd/happy_poo_jump_apk.pdfIn PDF document text
    • http://vuvulusigi.scienceontheweb.net/cultural_theory_and_popular_culture_a_reader.pdfIn PDF document text
    • http://wersita.space/nokodexajetuxoh.pdfIn PDF document text
    • https://cdn.sqhk.co/rovujesox/5vDZib3/download_underwater_survival_simulator_mod.pdfIn PDF document text
    • http://mmmmmme.space/answer_to_complaint_sample_californiabzynr.pdfIn PDF document text
    • http://smirno.life/marsha_linehan_dbt_skills_training_handouts_and_worksheetsnx2f5.pdfIn PDF document text
    • http://lady-bug.club/mimanexawagavonexirpiq5t.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/accabf92-44d3-4e78-9093-39cf68836b44/kawobojetilamu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1f9dad8-fe36-4a91-bf1a-97e4157c1216/how_to_rebuild_46re_transmission.pdfIn PDF document text
    • https://s3.amazonaws.com/rubidokezive/2011_bmw_s1000rr_performance_specs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/850c11f7-32ce-4010-b883-85f3c235ef58/verbal_reasoning_sample_question.pdfIn PDF document text
    • http://gumomexad.onlinewebshop.net/jikesemibavadabi.pdfIn PDF document text
    • https://s3.amazonaws.com/mekonulegipero/acrobat_pro_x.pdfIn PDF document text
    • https://s3.amazonaws.com/juwofuxufijup/17185153993.pdfIn PDF document text
    • http://womawujun.atwebpages.com/95995846704.pdfIn PDF document text
    • http://dapizodipe.myartsonline.com/worawajagokegezoxowibon.pdfIn PDF document text
    • https://s3.amazonaws.com/zidenigad/86948284440.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e3c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3C1 4740 bytes
SHA-256: 88e36d40677596585ce551466415134082dc210252fda7960a3707c04310b013
font_01_sfnt_off0000f3ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3EF 11028 bytes
SHA-256: 8ab7d692fdcefdb8f4c053656888242d11347c9625ee36b9b48a36ff567e6956
font_02_sfnt_off00011992.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11992 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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