Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce350e0bf113bbfc…

MALICIOUS

PDF

81.5 KB Created: 2021-04-06 12:14:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 33b242428d7c860fa6b4c249c0a84baf SHA-1: 1c56c69030832c3150d9ccf52923611fbf803611 SHA-256: ce350e0bf113bbfc8b922021a52e0dc0ff2c9404414fe7d9451743cef6da5fce
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 0.9993

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://pelibifir.ru/strik?utm_term=how+to+pair+jam2+speaker PDF link annotation
    • https://cdn.sqhk.co/jasurisunav/lXibhaN/nisodegoxuvepibezamelemo.pdfIn PDF document text
    • https://cdn.sqhk.co/zoribakim/eUihHZZ/22709103825.pdfIn PDF document text
    • http://molupopedidi.iblogger.org/sorununaxaruxo.pdfIn PDF document text
    • http://tinesemexogo.mygamesonline.org/13533321520.pdfIn PDF document text
    • https://cdn.sqhk.co/kapidibewomu/ib2NhaN/98666104895.pdfIn PDF document text
    • https://cdn.sqhk.co/volumusigu/fhcxhja/custom_keyboard_color_changer_app.pdfIn PDF document text
    • http://bazufilonunax.iblogger.org/a_dolls_house_characters_act_1.pdfIn PDF document text
    • https://cdn.sqhk.co/bukoxomule/ijiprRf/5876814903.pdfIn PDF document text
    • https://cdn.sqhk.co/xuzuvazol/janigMZ/marketplace_cars_under_1500.pdfIn PDF document text
    • http://vopukisavenif.medianewsonline.com/nutcracker_pas_de_deux_piano_sheet_music_free.pdfIn PDF document text
    • https://cdn.sqhk.co/vujagefamig/ibhguJ6/60671850860.pdfIn PDF document text
    • https://cdn.sqhk.co/mezadisedud/gc9JGYB/42828718639.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/292944e1-5303-45fb-a67b-a70e565aa065/82642681112.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b9530eb-925f-4fee-8156-73c253bc8540/51406982317.pdfIn PDF document text
    • https://s3.amazonaws.com/sutawowirosuvuv/pagurorubimilaxamepuwavub.pdfIn PDF document text
    • http://paremijabi.rf.gd/how_to_put_together_a_little_tikes_car_bed.pdfIn PDF document text
    • http://sibuxolubi.epizy.com/subject_verb_agreement_worksheet_grade_6.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df7850d9-cbad-4080-8777-d56906c0a710/1626606369.pdfIn PDF document text
    • https://s3.amazonaws.com/fadobirak/marketing_information_system_meaning_and_definition.pdfIn PDF document text
    • http://navipulazem.epizy.com/mofowilije.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0fa934ff-d568-4df8-ae95-5df1d171fdd0/lightning_thief_summary_chapter_1.pdfIn PDF document text
    • https://s3.amazonaws.com/gumegulaxi/lututubozelufure.pdfIn PDF document text
    • https://s3.amazonaws.com/resixexi/zugorotuxipe.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_off0000ff41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF41 5256 bytes
SHA-256: 2afcdd3c96c7ffd9731567e4516bdc92f5027ed08f640f3608eb4cb3eb102cbc
font_01_sfnt_off00011121.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11121 11984 bytes
SHA-256: 972bbc6d4c64219bd716bb06adebbb55b3aa33afd8eab37fdeb679002a7845f5

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