Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea0b76bb0809d3e5…

MALICIOUS

PDF

85.4 KB Created: 2021-02-18 06:03:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: e283e7e35205659c7128d99e6bf0dd05 SHA-1: 95214f686826d9fa0f617534c87e27b524afe7bd SHA-256: ea0b76bb0809d3e537bdd54ce10faee7cdf187eb3a017eb57a10799d8d1577dc
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://seumenha.ru/aws?utm_term=pharmacology+and+the+nursing+process+9th+edition+pdf PDF link annotation
    • https://janusizexagelu.weebly.com/uploads/1/3/5/3/135337128/1305857.pdfIn PDF document text
    • https://gixefizavemo.weebly.com/uploads/1/3/4/1/134108956/sajekiregadasow.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425484/normal_5fe09ec6928ee.pdfIn PDF document text
    • https://mopopapepiror.weebly.com/uploads/1/3/2/7/132741339/wiziruz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447251/normal_600b2bc856eee.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/pegek/18202150.pdfIn PDF document text
    • http://tiriburud.rf.gd/73415016152.pdfIn PDF document text
    • https://s3.amazonaws.com/pululusodogi/gejasesonuleboxusebodowa.pdfIn PDF document text
    • https://s3.amazonaws.com/xidulumexi/piano_chords_pack.pdfIn PDF document text
    • http://zumewozuzetarun.epizy.com/circuit_maker_for_mac_free.pdfIn PDF document text
    • https://s3.amazonaws.com/pewebopufupe/popujonabuwexeg.pdfIn PDF document text
    • https://s3.amazonaws.com/lewuli/mediafre_gta_5_mod_menu.pdfIn PDF document text
    • http://sanejiwobar.epizy.com/ccma_condonation_form.pdfIn PDF document text
    • https://s3.amazonaws.com/rakabexozu/7_key_principles_of_public_life.pdfIn PDF document text
    • https://s3.amazonaws.com/vigevot/25284924217.pdfIn PDF document text
    • https://s3.amazonaws.com/rixevozajixezos/32215320885.pdfIn PDF document text
    • https://s3.amazonaws.com/sezebepit/movimiento_rectilineo_uniforme_en_fisica_definicion.pdfIn PDF document text
    • http://walefusariwe.epizy.com/baal_veer_episode_1001_3gp.pdfIn PDF document text
    • http://fibubaxuvuvixik.epizy.com/blank_fax_cover_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/wanasuvedigo/seating_arrangement_questions_and_answers_indiabix.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_off00010ef4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EF4 5828 bytes
SHA-256: 2d717b194124f0360a5afbbea235e7a61e97468d4ec204bb906ba1662717c18b
font_01_sfnt_off000122ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122AB 11084 bytes
SHA-256: a1b0bbc64385cb8e7f3117d2a5afb579a6c176c3e70faa1abf70d30427194eb9

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